Schluter??-DITRA-HEAT Installation Handbook 2016

Electric Floor Warming System

with Integrated Uncoupling Technology???

WOOD

Every substrate presents unique challenges

All wood materials, including OSB, plywood, and framing members, are subject to expansion, contraction, bending, and deflection as a result of changes in moisture content and loading. Further, these deformations fluctuate over the life of the building structure.

DITRA-HEAT???s uncoupling function protects the ceramic or stone tile covering from the aforementioned deformations by neutralizing the differential movement stresses between the wood structure and the tile, thus eliminating the major cause of cracking and delaminating of the tiled surface. Therefore, DITRA-HEAT can replace a second layer of plywood in most applications.

Since wood structures are sensitive to moisture, DITRA-HEAT???s waterproofing function adds an essential element to the flooring assembly by providing simple, effective, and permanent moisture protection.

Wood continually absorbs and releases moisture. The free space beneath the DITRA-HEAT membrane allows the wood to breathe and provides a route for any residual moisture in the wood substrate to escape.

Since DITRA-HEAT is virtually incompressible within the tile assembly, the advantages of uncoupling are achieved without sacrificing point load distribution capabilities.

By addressing all of the challenges associated with today???s fast, lightweight construction methods, DITRA-HEAT provides a durable installation system for ceramic and stone tile over wood substrates.

DITRA-HEAT combines the flexibility of loose heating cables with the ease of installation of mat systems. Cables can be placed wherever heat is desired, without creating height differences in the floor. Self-leveling compounds are not required to encapsulate the cables, significantly reducing installation time and effort compared to uncoupling membranes over other electric floor warming systems.

4 WOOD ??? Floors, Interior - Ceramic or Porcelain Tile

WOOD ??? Floors, Interior - Ceramic or Porcelain Tile 5

6 WOOD ??? Floors, Interior

Floors, Interior - Existing Vinyl Floors

WOOD ??? Floors, Interior 7

CONCRETE

Every substrate presents unique challenges

There are various challenges associated with the installation of hard surface coverings on concrete substrates.To begin, the coefficient of thermal expansion of concrete is close to twice that of ceramic tile. Additionally, tile contractors are often expected to install tile over young concrete (concrete cured less than 28 days). However, rigid surface coverings installed over young concrete are susceptible to damage as a result of shrinkage during curing. Pre-stressed/post-tensioned concrete slabs are also commonplace in today???s construction environment. Although pre- stressing is used to help control deflections in concrete structures, these slabs are still subject to deformations caused by changes in moisture, temperature, and loading. Many concrete slabs on or below grade are subject to moisture migration, which can be problematic. Furthermore, these structures experience the same deformations as stated above.

DITRA-HEAT???s uncoupling function protects the ceramic or stone tile covering by neutralizing the differential movement stresses between the concrete substrate and the tile, thus eliminating the major cause of cracking and delaminating of the tiled surface.

DITRA-HEAT???s waterproofing ability not only protects the substrate from harmful substances, it also slows the drying of fresh concrete, which reduces the chances of cracking and curling of the slab.

The configuration of the DITRA-HEAT matting provides free space to accommodate vapor emissions from the concrete slab. This allows the installation of DITRA-HEAT and the tile covering as soon as the slab can be walked upon. Vapor management is also essential for slabs subject to moisture migration.

Since DITRA-HEAT is virtually incompressible within the tile assembly, the advantages of uncoupling are achieved without sacrificing point load distribution capabilities.

By addressing all of the challenges associated with today???s fast construction methods, DITRA-HEAT provides a durable installation system for ceramic and stone tile over concrete substrates.

DITRA-HEAT combines the flexibility of loose heating cables with the ease of installation of mat systems. Cables can be placed wherever heat is desired, without creating height differences in the floor. Self-leveling compounds are not required to encapsulate the cables, significantly reducing installation time and effort compared to uncoupling membranes over other electric floor warming systems. DITRA-HEAT-TB features an integrated thermal break to reduce heat loss to concrete substrates and improve floor warming response times.

Floors, Interior - Ceramic or Stone Tile

GYPSUM

Every substrate presents unique challenges

Bonding ceramic or stone tiles directly to gypsum concrete substrates is generally considered questionable or not recommended. The challenges associated with gypsum-based underlayments include the requirement of an extended drying period before installing tile and continued sensitivity to the reintroduction of moisture throughout the life of the installation. In addition, since the coefficient of thermal expansion of gypsum concrete is substantially greater than that of ceramic tile, shear stresses caused by temperature fluctuations can result in delamination or cracking of the tile covering. This is particularly important when gypsum concrete is used as a thermal mass for radiant heated floors. With the increasing popularity of radiant heated floors, which typically utilize gypsum concrete, tile installers need a reliable installation system to address these issues.

DITRA-HEAT???s uncoupling function protects the ceramic or stone tile covering by neutralizing the differential movement stresses between the gypsum concrete substrate and the tile, thus eliminating the major cause of cracking and delaminating of the tiled surface.

DITRA-HEAT???s waterproofing function prevents the reintroduction of moisture to gypsum concrete underlayments, which, if not prevented, could significantly compromise performance of the underlayment and lead to damage of the tiled surface.

The configuration of the DITRA-HEAT matting provides free space to accommodate vapor emissions from the gypsum.

Since DITRA-HEAT is virtually incompressible within the tile assembly, the advantages of uncoupling are achieved without sacrificing point load distribution capabilities.

By addressing all of the challenges associated with today???s fast, lightweight construction methods, DITRA-HEAT provides a durable installation system for ceramic and stone tile over gypsum substrates.

DITRA-HEAT combines the flexibility of loose heating cables with the ease of installation of mat systems. Cables can be placed wherever heat is desired, without creating height differences in the floor. Self-leveling compounds are not required to encapsulate the cables, significantly reducing installation time and effort compared to uncoupling membranes over other electric floor warming systems. DITRA-HEAT is useful even in applications where hydronic radiant-heating tubes are incorporated in gypsum concrete, as there may be times when floor warming is desirable while radiant heating is not necessary.

Floors, Interior - Ceramic or Stone Tile

GYPSUM ??? Floors, Interior - Ceramic or Stone Tile 9

WATERPROOFING

Every substrate presents unique challenges

Today???s construction methods, which include the use of lightweight, moisture-sensitive materials, such as plywood, OSB, and gypsum concrete, have made the installation of hard surface coverings particularly challenging. If wood or gypsum concrete substrates are exposed to moisture, the tile covering above can be damaged as a result.

Typical areas that require waterproofing include tub surrounds and showers. However, there are other commonly tiled areas that may, through unexpected circumstances, become exposed to significant amounts of water; for example, an overflowed toilet, or ruptured dishwasher, icemaker, or washing machine lines, which can result in flooding.

Waterproofing these floors can save an owner from replacing the tile assembly and substructure in the event of a leak. DITRA-HEAT and DITRA-HEAT-TB installations can be made waterproof with minimal effort. Since the matting is made of waterproof polypropylene, the only extra step necessary is to seal the seams and floor/wall connections. This is easily accomplished by applying KERDI-BAND to these areas using an unmodified thin-set mortar. The result is a waterproof installation that will not suffer damage in the event of an unexpected water leak. KERDI-DRAIN or KERDI-LINE may be used to provide drainage in DITRA-HEAT and DITRA-HEAT-TB installations.

10 WATERPROOFING ??? Floors, Interior

MOVEMENT JOINTS

Every substrate presents unique challenges

DISCUSSION

Movement joints are an integral part of any tile assembly. The various components of a tile assembly (tile, mortar, substrate, etc.) have unique physical characteristics that affect their behavior. Specifically, these components will expand and contract at different rates, according to each component???s intrinsic physical properties, with changes in moisture, temperature, and loading (both dead and live loads). This differential expansion/contraction of attached components results in internal stresses. Furthermore, structures that restrain overall expansion of the tile field (walls, columns, etc.) cause stress buildup within the system. If the aforementioned movements are not accommodated through the use of movement joints in the tile field and at restraining structures, the resulting stresses can cause cracking of the grout and tile and delamination of the tile from the substrate. Thus, movement joints are an essential component of any durable tile assembly.

SOLUTIONS

Movement joints must be incorporated within the tile field, at doorsills, and at transitions to walls and other restraining structures to allow movement of the assembly and prevent stresses that can damage the system. Schluter??-Systems??? prefabricated movement joint profiles protect tile edges and prevent sound bridges and surface water penetration, resulting in a permanent, maintenance-free installation. The family of Schluter??-DILEX prefabricated movement profiles includes a variety of shapes, sizes, and materials to suit different applications. Please see Schluter??-Systems??? Illustrated Price List and visit www. schluter.com for more detailed information on DILEX movement profiles.

TECHNICAL NOTES

The Tile Council of North America (TCNA) and the Terrazzo, Tile, and Marble Association of Canada (TTMAC) provide guidelines (EJ171 and 301MJ, respectively) for the placement and construction of movement joints in and around the tile field. Schluter??-Systems accepts these guidelines. However, given the increased use of larger tiles, smaller grout joints, and lighter building materials, which are more susceptible to movement, Schluter??-Systems recommends that movement joints within the tile field be placed at more frequent intervals, as indicated below.

Guidelines for the placement of movement joints

Applications without heating cables: 16' - 20' (4.9 m - 6.1 m) in each direction

Applications with heating cables or exposed to direct sunlight or moisture: 12' - 16' (3.7 m - 4.9 m) in each direction

Place around the perimeter of any size floor and/or against all restraining surfaces

Fields should be as square as possible. The ratio between length and width should not exceed 1:1.5.

MOVEMENT JOINTS 11

12 MOVEMENT JOINTS

Note regarding residential applications

Due to the increased popularity of continuous tile installations (i.e., tile continuing from room to room on a given floor), movement joints have become both increasingly important and increasingly difficult to provide. For instance, consider the residential installation shown in Figure 5. It is almost certain that the homeowner will resist the idea of placing movement joints across any of the rooms shown in the figure, despite TCNA, TTMAC, and Schluter??-Systems guidelines. However, the need for movement joints in this installation is undeniable, given the extended size of the field. The question then becomes, ???How does one provide the movement joints necessary to ensure a durable installation without compromising the aesthetic qualities of the continuous tile field????

The easiest way to accomplish this goal is to begin by providing movement joints at the perimeter of the installation. Perimeter joints are absolutely necessary and do not interrupt the tile field. The next step would be to place movement joints at the thresholds between rooms or where a tiled hallway meets a larger tiled room. These locations are relatively inconspicuous and the lines formed by the movement joints are logical in that they reflect the natural perimeter of each room. Finally, determine if any other characteristics of the floor plan invite the placement of additional movement joints. In this example, the intersection of the nook area and kitchen/family room may be a reasonable choice.

Schluter??-Systems understands that the tile setter must take into account the needs of his or her client in determining the placement of movement joints in a tile installation. For example, a client may not wish to interrupt a continuous tile field that spans multiple rooms. However, as indicated by the orange lines above, there are ways to meet industry guidelines that will serve to provide the client with a durable installation that remains aesthetically pleasing.

MOVEMENT JOINTS 13

WOOD UNDERLAYMENT

Plywood/OSB underlayment installation guidelines

DISCUSSION

In some applications referenced in this Handbook, adding a layer of plywood or OSB before installing DITRA-HEAT and the ceramic or stone tile covering is required to reduce deflection and curvature of the sheathing between the joists.

INSTALLATION GUIDE

Place underlayment panels (Exposure 1, plugged-face plywood or OSB) with long dimension perpendicular to floor joists such that the following conditions are met:

1.Abut all underlayment end joints at quarter points between joists.

Example: Abut underlayment panels on either side of the joist centerline at: 4" (102 mm) for 16" (406 mm) o.c. joists, 5" (127 mm) for 19.2" (488 mm) o.c. joists, or 6" (152 mm) for 24" (610 mm) o.c. joists (see figures 1 & 2).

Note: Underlayment end joints should be placed as far away from subfloor end joints as possible.

2.Underlayment to overlap edge joints of subfloor by 1/2 of the width of the subfloor panel (24" - 610 mm). At restraining surfaces, overlap may be less than 24" (610 mm) when the subfloor panel is less than 48" (1.2 m)-wide (see figure 1).

3.Gap underlayment panels 1/8" (3 mm) on all ends and edges, and 1/4" (6 mm) at perimeter walls, cabinetry, or other restraining surfaces.

Figures 1 & 2 ??? Typical Subfloor/Underlayment Detail (Not to Scale)

Figure 1

Figure 2

Plywood/OSB Type and Fastener Schedule Guidelines

The following guidelines must be followed when fastening underlayment panels:

1.Use ring shank nails (no staples) or wood screws (no drywall screws).

2.Fasteners must pass through entire thickness of underlayment and subfloor panels with minimal penetration into joists (see figure 2).

FINAL WORD

As stated previously, Schluter??-Systems requires that any underlayment panel must have a minimum thickness of 3/8" (10 mm). When in doubt, increase underlayment thickness.

14 WOOD UNDERLAYMENT

INSTALLATION

Schluter??-DITRA-HEAT membrane and heating cables

Planning

For access to the DITRA-HEAT Calculation Sheet and DITRA-HEAT Online Calculator, see www.schluter.com.

???Select DITRA-HEAT and DITRA-HEAT-TB membrane according to the size of the area to be tiled.

???Select DITRA-HEAT-E-HK heating cable according to the size of the area to be heated. Be sure to measure accurately. The heating cable CANNOT be cut to fit. The allowable heated area is limited by the minimum required spacing from fixed elements such as:

???Walls = 3" (75 mm)

???Fixed cabinets = 2" (50 mm)

???Heat sources (baseboard heaters, fireplaces, forced air heating ducts, etc.) = 8" (200 mm)

???Floor drains = 6" (150 mm)

???It is helpful to plan the location of a buffer zone, as it is not possible to predict exactly where the heating cable will end. The buffer zone is an area where floor warming is not essential and heating cable installation is not planned (e.g., behind a toilet or adjacent to a door opening). This area allows for placement of excess heating cable. Heating cables may also be installed 6" (150 mm) from the wall to create a buffer zone.

???For more information on installing DITRA-HEAT-E-HK heating cables on 208 V circuits, please see page 25.

???Two DITRA-HEAT-E-HK heating cables can be connected and controlled by a single DITRA-HEAT-E-RT/-RSD/-R thermostat if the total current is less than 15 amps. The heating cable leads must be wired in parallel according to applicable electrical and building codes.

???Multiple DITRA-HEAT-E-HK heating cables over 15 amps cannot be connected to a single DITRA-HEAT-E-RT/-RSD/-R thermostat. Additional DITRA-HEAT-E-RT/-RSD/-R thermostats must be used or the DITRA-HEAT-E-RT thermostat may be combined with the DITRA-HEAT-E-RR power modules.

Preparation

??? ???The substrate must be clean, even, and load bearing. Any leveling of the subfloor must be done prior to installing DITRA-HEAT and DITRA-HEAT-TB.

??? ???For wood substrates, verify that panels are properly fastened. Tightly butted and/or tented plywood or OSB seams must be addressed prior to installing DITRA-HEAT and DITRA-HEAT-TB. If a plywood/OSB underlayment is to be installed, follow the Wood Underlayment guidelines on page 14.

??? ???For vinyl substrates, ensure that the structure beneath is sound and adequate and that the vinyl is well adhered. Remove any wax and clean the surface. For vinyl over wood structures, nail off floor with ring shank flooring nails every 4" (102 mm) o.c. - fasteners must pass through entire thickness of assembly with minimal penetration into joists.

??? ???For concrete substrates, remove any waxy or oily films and curing compounds (if present) by mechanical scarification. When bonding DITRA-HEAT and DITRA-HEAT-TB to particularly dry, porous concrete, the slab should be moistened to saturate the concrete and help prevent premature drying or skinning of the bond coat. Excess or standing surface water must be removed prior to installation.

??? ???For gypsum substrates, residual moisture in gypsum screed must be 2.0% or less before installing DITRA-HEAT and DITRA-HEAT-TB. Follow gypsum manufacturer???s directions for additional substrate preparation.

Membrane

Heating Cables

Warning

???Before installing and operating this product, the user and/or installer must read, understand and follow these instructions and keep them handy for future reference. If you have a question, please contact Customer Service by phone 800-472-4588 (USA) or 800-667-8746 (Canada) or from our website at www.schluter.com.

???If these instructions are not followed, the warranty will be considered null and void and the manufacturer deems no further responsibility for this product.

???The following instructions must be adhered to in order to avoid personal injuries or property damages, serious injuries and potentially fatal electric shocks.

???This product must be installed by a qualified person in accordance with this installation handbook and with the Canadian Electric Code Part I (Canada) or the National Electric Code (U.S.) as applicable. All electric connections must be made by a qualified electrician, according to the electrical and building codes effective in your region.

???A dedicated circuit is required for each application.

???A ground fault circuit interrupter (GFCI) is required for each circuit. The DITRA-HEAT-E-RT/-RSD/-R thermostats include a GFCI, thus a GFCI circuit breaker is not required when using these thermostats.

???NEVER install a cable designed for a 120 V power source on a 240/208 V power source.

???This cable must be grounded. Connect the heating cable ground to the ground wire from the electrical panel.

???Mark the circuit breaker in the electrical panel that is dedicated to the DITRA-HEAT floor warming system using the identification sticker provided. Additional stickers provided may be placed on the electrical panel door.

???De-energize all power circuits before installation and servicing.

???Very important: Never CUT or modify the heating cable in any way. This would change the cable resistance, will cause damage to the cable, and could cause cable overheating.

???Heating cables shall not be altered in the field. If the installer or the user modifies the unit, he will be held responsible for any damage resulting from this modification, and the warranty and the product certification will be void.

???The heating section of the cable must be entirely installed under the floor covering. The installation is characterized as a Type C (Embedded Floor Warming) application. In order to prevent a fire hazard, do not install it anywhere else (e.g. in a wall).

???Do not run the heating cable under a wall, from one room to another; an individual cable must not heat more than one room.

???NEVER install the heating cable under vanities, bathtub platforms, kitchen cabinets or any other fixtures or in closets. Excessive heat will build up in these confined spaces and may cause cable overheating.

???NEVER use the heating cable for any purpose other than heating a floor INSIDE a building.

???Always keep a 3 stud (3-1/2" ??? 9 cm) spacing between cable runs. A narrower spacing may cause a fire or damage the floor covering. A wider spacing (e.g., 4 studs) may not provide sufficient power to warm the floor to the desired temperature. Exception: a two stud spacing is used when connecting the 240 V cable to a 208 V power supply. See page 25 for more information.

???Heating cables may not touch, cross over, or overlap one another.

???Minimum spacing from walls is 3" (75 mm).

???Minimum spacing from fixed cabinets is 2" (50 mm).

???Minimum spacing from other heat sources (baseboard heaters, fireplaces, forced air heating ducts, etc.) is 8" (200 mm).

???Minimum spacing from any plumbing drain is 6" (150 mm).

???It is helpful to plan the location of a buffer zone, as it is not possible to predict where the heating cable will end. The buffer zone is an area where heating is not essential and heating cable installation is not planned (e.g., behind a toilet or adjacent to a door opening). This area allows for placement of excess heating cable. Heating cables may also be installed 6" (150 mm) from the wall to create a buffer zone.

???NEVER install the factory splice (i.e., black plastic junction between the cold lead and gray heating cable) in the wall. This will cause overheating, system failure, and could cause a fire. This splice must be installed entirely under the floor covering, as shown in the heating cable installation instructions.

???Heating cable testing is required while the heating cable is on the spool and at two subsequent steps during installation to ensure cable quality and for warranty purposes.

???If a break or damage is detected during the heating cable testing, return the cable to the original place of purchase. Do not proceed with heating cable installation into the DITRA-HEAT or DITRA-HEAT-TB matting or with the tile covering installation.

???NEVER energize the cable while it is on the spool. This would lead to overheating that could damage the cable and may cause a fire.

???Keep ends of heating devices and kit components dry before and during installation.

???The minimum temperature at which the cable should be installed is 32?? F (0?? C).

???Avoid folding the heating cable on itself, a radius of curvature less than 0.0625 inch (1.6 mm) could damage its sheath.

???The minimum installed bending radius of the heating cable is 0.5 inches (12.7 mm).

16 INSTALLATION

i

To avoid damaging the DITRA-HEAT-E-HK heating cable spool due to handling, we recommend turning the box over to remove the spool from the packaging box. Then pick up the spool from underneath the heating cable coil, but not by the cardboard washers.

Heating Cable Tests

To qualify for resolution for failure of the Schluter??-DITRA-HEAT-E-HK heating cables within the Schluter??-DITRA-HEAT & Schluter??-DITRA-HEAT-TB Limited System Warranty for ten (10) years, complete the following tests:

???Test 1: Conductor Resistance

???Test 2: Conductor and Ground Braid Continuity

???Floor Temperature Sensor Test

(Test 3: Insulation Resistance is recommended, but not required)

To extend the term for resolution for failure of the Schluter??-DITRA-HEAT-E-HK heating cables within the Schluter??-DITRA-HEAT & Schluter??-DITRA-HEAT-TB Limited System Warranty from ten (10) years to fifteen (15) years, complete all tests as follows:

???Test 1: Conductor Resistance

???Test 2: Conductor and Ground Braid Continuity

???Test 3: Insulation Resistance

???Floor Temperature Sensor Test

Please refer to the Heating Cable Tests Log on page 30 of this Handbook and Warranty on page 31 of this Handbook for further information.

Test 1: Conductor resistance (required)

In order to perform the resistance test, you must set your multimeter for resistance measurement and take an ohms reading between the two power leads. If the ohms reading taken on the two power leads varies significantly (10% or more) from the value printed on the spool, it either means that the cable has been damaged, or that the measuring instrument is not set properly, or that it is simply out of calibration. The ohms measurement must be recorded in your heating cable tests log (page 30).

Test 2: Conductor and ground braid continuity (required)

The heating cable is protected by a ground braid. An electrical insulator prevents any contact between the braid and the two conductors. To make sure there is no contact between the braid and the two conductors, you must perform a continuity test. Using the continuity test (buzzer logo) function of your multimeter, test your cable between the braid and one of the two power leads. If there is no continuity (if the test is successful), the multimeter will display, depending on the instrument used, either ???OL ??? for ???over load??? or ???I??? for ???infinity???. Otherwise, if the test fails, neither ???OL ???, nor ???I??? will be displayed and a warning tone will be heard. The test result must be recorded in your heating cable tests log (page 30).

Test 3: Insulation resistance (recommended)

This test is meant to detect very small breaks throughout the cable insulation. These breaks often remain undetected during the continuity test since they are not necessarily short circuits between the conductor and the ground braid. Even though they are small, these breaks are likely to cause a current leakage to ground. Such a leakage is usually detected by the mandatory ground-fault circuit interrupter ???GFCI??? (thermostat with integrated GFCI or panel mount GFCI). When a current leakage is detected, the GFCI trips the circuit, thus disabling the floor heating system. In order to perform the insulation resistance test, you must, using a megohmeter (Mohm logo), take an insulation measurement between the braid and one of the two power leads. Make sure the megohmeter range is set at 1000 V. The insulation resistance measurement must be equal to or greater than 1 Gigaohms (1 Gigaohms = 1 G ohms = 1000 M ohms = 1000 Mega ohms). The insulation resistance measurement must be recorded in your heating cable tests log (page 30).

DITRA-HEAT Thermostat Floor Temperature Sensor Test (required)

Test the floor temperature sensors using a multimeter to verify accuracy of the sensors. Set the multimeter for resistance at 10K ?? +/- 2 (at room temperature) and take a reading between the sensor leads. The resistance will vary according to the temperature (i.e., the colder the sensor, the higher the resistance). Compare the measured values with the table of expected values and record in the heating cable tests log on page 30.

INSTALLATION 17

Installation

Check to ensure the heating cable(s) purchased match the power supply (i.e., 120 V with 120 V or 240 V with 240 V, or 240 V with 208 V). Check to ensure you are not exceeding the 15 amp limit of the thermostat. Compare the purchased cable area to the floor area to be heated. Important: The cable area purchased should be as close to the heated area as possible, without going over. The heating cable CANNOT be trimmed or shortened to fit.

It is recommended that the installation of the DITRA-HEAT system is photographed (e.g., heating cable layout, floor temperature sensor placements, transition splice location, end splice location, and wide view of the room) for reference with future renovation work and troubleshooting. The homeowner/end user should retain these photos for their records.

hot glue). Embed the sensor wire in the matting without overlapping or crossing the heating cable.

Extending the heating cable cold lead

The cold lead is made up of two 14 AWG conductors with a copper braided shield, that is used as the grounding conductor. The extension must be made with building wire that is suitable for this application and complies with applicable building and electrical codes. The cold lead itself is not made of building wire and therefore cannot pass through studs unless run through a conduit. Extension of the cold lead requires the addition of a ???code compliant??? junction box that must be accessible at all times. The maximum length for extending the cold lead is 75 ft (23 m).

Extending the floor temperature sensor

The floor temperature sensor can be extended using an 18 AWG, 2-wire cable. The sensor wire itself is not made of building wire and therefore cannot pass through studs unless run through a conduit. We recommend twisting and soldering the wires and using electrical tape to insulate them. There is no maximum length that is recommended, however the longer the extension the greater the possibility that the quality of the signal (and resulting temperature sensing) will be skewed. Regardless of the method used, the resulting splice must comply with applicable building and electrical codes. A loose connection between the extension and the sensor will result in a false reading or an error code.

18 INSTALLATION

Waterproofing

The following steps are required for waterproofing only:

Note: While the heating cable is protected by the DITRA-HEAT and DITRA-HEAT-TB matting, be careful when applying the mortar to not damage the cable with the notched trowel.

INSTALLATION 19

Tiles

Note: While the heating cable is protected by the DITRA-HEAT and DITRA-HEAT-TB matting, be careful when applying the mortar to not damage the cable with the notched trowel.

Note: Coverage may vary with mortar consistency, angle at which the trowel is held, substrate flatness, etc. If full coverage is not achieved, remove and reapply, making sure to verify proper mortar consistency and application. For large-format tiles, e.g., 12" x 12" (305 mm x 305 mm) and larger, back-buttering the tiles with a skim coat of thin-set mortar is a useful way to help ensure proper coverage. The skim coat can fill in the concave area on the back of the tile (ceramic tiles are not perfectly flat) and improve contact with the mortar combed on the substrate.

ESTIMATED THIN-SET COVERAGE

To bond DITRA-HEAT to the substrate:

Use one 50 lb. (22.68 kg) bag of mortar per 100 ft2 (9.3 m2).

To bond the tile to the DITRA-HEAT, using a 1/4" x 3/8" (6 mm x 10 mm) square- or U-notched trowel:

Use one 50 lb (22.68 kg) bag of mortar per 40 - 50 ft2 (3.7 - 4.6 m2).

To bond the tile to the DITRA-HEAT, using a 1/2" x 1/2" (13 mm x 13 mm) square- or U-notched trowel:

Use one 50 lb (22.68 kg) bag of mortar per 30 - 40 ft2 (2.8 - 3.7 m2).

4Once the tile installation is complete, retest the heating cable and record values in the heating cable tests log (page 30).

Allow the assembly to cure for 7 days after grouting before putting the floor warming into service.

Operating Tips

???Do not place furniture or mats over the floor temperature sensor. They can act as insulation and raise the floor temperature reading at the thermostat. This may cause the heating to turn off before the remainder of the floor reaches the desired temperature.

???Area rugs are not recommended over the DITRA-HEAT system.

???Futons, mattresses, floor-level furniture, pillows, etc. must not be placed directly onto the heated floor. Placement of items directly onto the heated floor will prevent heat diffusion (i.e., air circulation) and could result in damage.

20 INSTALLATION

THIN-SET FACTS

Discussion of thin-set mortars and Schluter??-DITRA-HEAT installations

QUESTION: Can ceramic tile, including porcelain tile, be set on DITRA-HEAT with unmodified thin-set mortar?

ANSWER: YES. In fact, we recommend it. Here???s why:

Portland cement-based unmodified thin-set mortars are dependent on the presence of moisture for hydration in order to gain strength. Since DITRA-HEAT is impervious, it does not deprive the mortar of its moisture. This allows the cement to properly hydrate, resulting in a strong, dense bond coat. In fact, after the mortar has reached final set (usually within 24 hours), unmodified thin-set mortars achieve higher strengths when cured in continually moist conditions.

QUESTION: Can ceramic tile, including porcelain tile, be set on DITRA-HEAT with latex-modified thin-set mortar?

ANSWER: We DON'T recommend it. Here???s why:

Latex-modified mortars must air dry for the polymers to coalesce and form a hard film in order to gain strength. When sandwiched between two impervious materials such as DITRA-HEAT and ceramic tile, including porcelain tile, drying takes place very slowly through the open joints in the tile covering. [According to the TCNA Handbook for Ceramic, Glass, and Stone Tile Installation, this drying period can fluctuate from 14 days to over 60 days, depending on the geographic location, the climatic conditions, etc.]. Therefore, extended cure times would be required before grouting if using modified thin-set mortars between DITRA-HEAT and ceramic tile, including porcelain tile. If extended cure times were not observed, the results could be unpredictable.

ADDITIONAL NOTES

Over 25 years of field experience and testing by the Tile Council of North America (TCNA) support the efficacy of using unmodified thin-set mortars to bond ceramic tile, including porcelain tile, to uncoupling membranes.

Remember, the type of mortar used to apply DITRA-HEAT depends on the type of substrate. The mortar must bond to the substrate and mechanically anchor the fleece on the underside of the DITRA-HEAT. For example, bonding DITRA-HEAT to wood requires latex-modified thin-set mortar. When bonding DITRA-HEAT to particularly dry, porous concrete with unmodified thin-set mortar, the slab should be moistened to saturate the concrete and help prevent premature drying of the mortar. Excess or standing surface water must be removed prior to installation. Additionally, all mortars (modified and unmodified) have an acceptable temperature range that must be observed during application and curing.

THIN-SET FACTS 21

TESTING & CERTIFICATIONS

Product Evaluation

Schluter??-Systems is committed to providing reliable installation systems for ceramic and stone tile. As part of this commitment, we have invested considerable resources in testing our products and obtaining certifications where applicable to provide our customers and local code officials with relevant data that supports the efficacy of our systems. All the testing referenced below was performed by independent laboratories.

Uncoupling and Support/Load Distribution

The method used to establish the overall performance of a tile assembly under loading is the ASTM C627 ???Standard Test Method for Evaluating Ceramic Floor Tile Installation Systems Using the Robinson Type Floor Tester.??? The assembly is tested in cycles using a loaded, revolving carriage. Load, wheel hardness, and number of revolutions vary with each cycle. Once a specified level of damage is exceeded, the test is stopped. The TCNA Handbook for Ceramic, Glass, and Stone Tile Installation assigns performance levels to an assembly based on the number of cycles successfully completed. The ratings include residential, light, moderate, heavy, and extra heavy, in order of improving performance.

Assembly Notes:

1.All plywood and OSB subfloors were 23/32" (3/4" nom.) -thick; 11/32" (3/8" nom.) -thick OSB underlayment added for carrara marble test

2.Modified thin-set mortar (ANSI A118.11) to bond membrane to plywood and OSB

3.Unmodified thin-set mortar (ANSI A118.1) to bond membrane to concrete

4.Unmodified thin-set mortar (ANSI A118.1) to bond tile to membrane

5.High Performance Cement Grout (ANSI A118.7)

The test results above demonstrate that DITRA-HEAT performs extremely well under load while at the same time providing flexibility within the shear plane. DITRA-HEAT-TB was found to be suitable for residential and light commercial traffic, depending on the substrate and tile chosen.

Waterproofing

DITRA-HEAT and DITRA-HEAT-TB provide reliable waterproofing in interior applications. The products have been found to meet or exceed the requirements of the American National Standard Specifications for Load Bearing, Bonded, Waterproof Membranes for Thin-set Ceramic Tile and Stone Installation A118.10.

Vapor Management

The free space under the DITRA-HEAT and DITRA-HEAT-TB mattings allow the substrate to breathe, while the material composition provides for a very low water vapor permeance, which prevents any significant vapor intrusion in the tile assembly from below.

*Using the water method at 73??F (23??C) and 50% RH

The result is the DITRA-HEAT and DITRA-HEAT-TB effectively manage vapor and prevent damage to the tile covering as a result.

22 TESTING & CERTIFICATIONS

Certifications

Heating cables

The DITRA-HEAT-E-HK heating cables sets are certified or listed to the following standards and usage:

???CAN/CSA-C22.2 No. 130-03 "Requirements for Electrical Resistance Heating Cables and Heating Device Sets" under usage markings GXW for general use (G) with a wet rating (W), but specifically (X) for embedded indoor floor warming applications.

???UL 1673 "Electric Space Heating Cables" for installation in poured masonry floors within enclosed structures.

???ANSI/IEEE 515.1-2005 "IEEE Standard for the Testing, Design, Installation, and Maintenance of Electrical Resistance Heat Tracing for Commercial Applications" for installation Type C embedded floor warming within enclosed structures.

Thermostat

The DITRA-HEAT-E-RSD digital thermostat is:

???Certified to CSA C22.2 No. 24-93 (Reaffirmed 2003) ???Temperature-Indicating and Regulating Equipment???.

???Listed to UL 873 ???Temperature-Indicating and Regulating Equipment??? 11th Edition, containing revisions through and including April

18th, 2006.

The DITRA-HEAT-E-RT/-R digital thermostats are UL listed according to the following standards:

???UL 60730-1 ???Automatic Electrical Controls for Household and Similar Use ??? Part 1: General Requirements???

???UL 60730-2-9 ???Automatic Electrical Controls for Household and Similar Use ??? Part 2-9: Particular Requirements for Temperature Sensing Controls???

???CSA E60730-1:13 ???Automatic Electrical Controls for Household and Similar Use ??? Part 1: General Requirements???

???CSA E60730-2-9 ???Automatic Electrical Controls for Household and Similar Use ??? Part 2-9: Particular Requirements for Temperature Sensing Controls???

???UL 943 4th ed. ???Ground-Fault Circuit Interrupters???

???CSA C22.2 No. 144.1-06 ???Ground-Fault Circuit Interrupters???

Certifications and listings may be accessed Membranevia our website at www.schluter.com

DITRA-HEAT:

???ICC-ES Report No. ESR-2467

???ICC-ES PMG Report No. PMG-1204

???U.S. Pat. No. 8,950,141, and U.S. DES. PAT. No. D706459 Canada D Schluter Systems L.P. and other patents pending

DITRA-HEAT-TB:

???ICC-ES Report No. ESR-2467

???ICC-ES PMG Report No. PMG-1204

???Patent pending

Green Building

DITRA-HEAT has been independently tested for VOC emissions per California Specification 01350: ???Standard Practice for the Testing of Volatile Organic Emissions from Various Sources Using Small-Scale Environmental Chambers???.

DITRA-HEAT was found to emit 0.03 mg/m3 total VOCs. Thus, DITRA-HEAT complies with tolerable levels outlined in CA 01350. Products in compliance with the tolerable levels outlined in this specification are specified by many green building standards and rating systems, including:

???LEED v4, IEQ Credit: Low-Emitting Materials

???NAHB National Green Building Standard (ICC 700), 901.7, 901.8: Pollutant Source Control - Hard-Surface flooring, Wall coverings

???Green Globes for New Construction 2014 (v1.3), 3.7.1: Volatile Organic Compounds

???International Green Construction Code (IgCC), 806.4, 806.5: Flooring, Wall Systems

???Standard for the Design of High Performance Green Buildings (ASHRAE 189.1), 8.4.2.3, 8.4.2.6: Floor Covering Materials, Wall Systems

???California Green Building Standards Code (CALGreen), 4.504.2 (Res), 5.504.4 (Non-Res): Finish Material Pollutant Control

???CHPS, EQ2.2: Low-Emitting Materials

TESTING & CERTIFICATIONS 23

DITRA-HEAT-TB

Solution to improve floor warming response time

The challenge of concrete substrates

Concrete substrates can absorb enough heat energy to significantly increase the time it takes for floors to warm up, particularly when there is no insulation layer below the concrete. In some cases, floors may never reach the desired temperature. There are solutions to address this challenge, such as installing the heating cables at closer spacing for increased energy output or installing a thermal break prior to heating cable installation to reduce heat loss into the substrate. However, both of these solutions increase material and labor costs.

A one-step solution

Schluter??-DITRA-HEAT-TB offers the same functions as the Schluter??-DITRA-HEAT membrane, but also features an integrated thermal break in the form of a thicker bonding fleece. The thermal break reduces heat loss to the substrate and improves the floor warming response time at the standard three stud cable spacing. Since an effective thermal break can be created with a relatively low R-value, the DITRA-HEAT-TB membrane is only 5/16" (8 mm)-thick, compared to DITRA-HEAT at 1/4" (5.5 mm)-thick.

Thermal resistance

The DITRA-HEAT-TB thermal break was tested according to the ASTM C518 ???Standard Test Method for Steady-State Thermal Transmission Properties by Means of the Heat Flow Meter Apparatus??? and determined to have an R-value of 0.35. This value may seem low, but it is sufficient to improve the system warm up time. Increased thermal resistance may be required if improving overall energy efficiency is also desired and the floor warming system is to be used for extended periods instead of limited hours during the morning and at night.

Floor warming performance

In laboratory testing, DITRA-HEAT-TB reduced floor warming response time from 68??F (20??C) to 78??F (25.5??C) by approximately 80% (90 minutes) compared to DITRA-HEAT over a concrete substrate.

Wood substrates act as insulators and typically do not pose the same challenges as concrete substrates. In the same laboratory testing, DITRA-HEAT-TB only reduced floor warming response time from 68??F (20??C) to 78??F (25.5??C) by approximately 20% (5 minutes) compared to DITRA-HEAT over a plywood substrate.

Schluter??-DITRA-HEAT-E-HK heating cables were spaced at three studs in all of the above tests.

Results above are based upon laboratory testing. Actual results may vary depending on various factors, including concrete substrate thickness, concrete substrate temperature, room temperature, heat losses, etc.

24 DITRA-HEAT-TB

208 V APPLICATIONS

Discussion of Schluter??-DITRA-HEAT-E-HK Heating Cables in

208 V Applications

Schluter??-DITRA-HEAT offers complete flexibility when creating warm floors in any application. Schluter??-DITRA-HEAT-E-HK heating cables are designed for use with common 120 V and 240 V power sources. 208 V power sources are used in some cases to handle larger loads (e.g., HVAC equipment, motors, etc.) or to improve energy efficiency.

Schluter??-Systems recommends using the DITRA-HEAT-E-HK 240 V heating cables when a 208 V power source is present. However, this will reduce the heating power by 25% to 9.5 W/ft2 at the standard 3-stud cable spacing, which may not be sufficient power to warm the floor in these applications. To offset the effect of the lower voltage, we recommend installing the heating cable at a 2-stud spacing in these applications. This results in an increased heating power of 14.2 W/ft2, which will ensure adequate performance.

The heating cable will cover 33% less area when spaced at 2 studs compared to 3 studs. Therefore, a longer heating cable must be selected to cover a given area in these applications. Coverage for each 240 V heating cable spaced at 2 studs can be found in the table below.

DITRA-HEAT-E-HK 240 V Heating Cables in 208 V Applications at 2 Stud Spacing

We recommend consulting with a qualified electrician for design and installation of your DITRA-HEAT system on a 208 V power source. Keep in mind during design of the system that the DITRA-HEAT-E-RT/-RSD/-R thermostats have an electrical current limit of 15 A.

208 V APPLICATIONS 25

NATURAL STONE

Discussion of natural stone and single-layer wood subfloors

Natural stone is a product of nature with a wide variety of colors, patterns, and textures that come together to distinguish it as one of the premiere surface coverings available on the market. Some of stone???s characteristics, which add to its beauty and uniqueness, are veins, fissures, starts, and dry-seams. While these characteristics enhance its aesthetic appeal, they???re also indicators that point to the inherent variability of the flexural strength of natural stone, which can have detrimental effects on serviceability. This variability is underscored by examining the range of typical flexural (bending) strengths of ceramic tile compared to the range of strength for some common natural stones.

Schluter??-Systems contracted the Tile Council of North America (TCNA) to perform flexural strength testing on various commercially available ceramic tiles and dimension stones guided by the ASTM C880 Standard Test Method for Flexural Strength of Dimension Stone. Five samples of each tile and stone were tested, with the minimum recorded values displayed in the figure below. We have chosen to show only minimum values since these represent the weakest samples, which would be most prone to cracking in service over a bending substrate.

It is clear from the figure that the minimum recorded flexural strengths of these dimension stones tend to be significantly less than those of the ceramic tiles. In some cases, the differences are dramatic. For example, the minimum recorded flexural strength of the weakest travertine sample (337 psi) was only 14% of the minimum flexural strength of the weakest ceramic sample (2438 psi). In other words, the weakest ceramic sample was more than 7 times as strong as the weakest travertine sample. As another example, the minimum recorded flexural strength of the weakest porcelain sample is more than 12 times as strong as the minimum recorded flexural strength of the weakest travertine sample.

Q.Why does Schluter??-Systems recommend a double-layer wood floor for installing natural stone over DITRA-HEAT and DITRA-HEAT-TB?

A.There are three principle reasons: 1) As illustrated above, the fact that most stone products have a minimum flexural strength that is substantially lower than what is typical for ceramic tile; 2) Stones are products of nature and complex heterogeneous materials with naturally occurring regions of discontinuity, such as veins and fissures. Such features can be weaker than the surrounding stone fabric and act as ???stress risers,??? concentrating bending stresses within the region of discontinuity; and 3) When wood floor assemblies are subjected to forces such as loading ??? both live and dead loads ??? they produce flexural stresses in the surface covering which can cause weak and brittle materials to break or crack.

Engineering mechanics as well as field observations show that the location of maximum flexural stresses in the floor assembly is directly over the floor joists and at seams in the subfloor panels. Therefore, we recommend double-layer wood floors when installing natural stone in order to increase the stiffness of the sheathing assembly and position underlayment seams away from the joists to minimize flexural stresses in the stone covering directly above the joists and at seams. Refer to page 14 for underlayment installation guidelines. For more information on the development of these guidelines, please refer to the article titled ???Position of Underlayment to Prevent Cracked Tile and Grout??? on our website at www.schluter.com/5138.aspx.

26 NATURAL STONE

PRODUCT & ORDERING INFO

The ordering information for the Schluter??-DITRA-HEAT, DITRA-HEAT-TB, and KERDI components outlined in this Handbook is located below. For technical support, Illustrated Price List, or to receive additional information on our complete product line, please call 800-472-4588 (USA) or 800-667-8746 (Canada), or visit our comprehensive website at www.schluter.com.

Schluter??-DITRA-HEAT

DITRA-HEAT is a polypropylene membrane with a cut-back stud structure and an anchoring fleece laminated to the underside. The matting is 1/4" (5.5 mm) thick. The stud structure is specifically designed to secure DITRA-HEAT-E-HK electric floor heating cables. DITRA-HEAT integrates customizable electric floor warming with the functions associated with DITRA: uncoupling, waterproofing, vapor management and support to ensure a long lasting installation.

Uncoupling and waterproofing membrane (1/4" ??? 5.5 mm)

U.S. Pat. No. 8,950,141, and U.S. DES. PAT. No. D706459

Canada D Schluter Systems L.P. and other patents pending

Schluter??-DITRA-HEAT-TB

DITRA-HEAT-TB is a polypropylene membrane with a cut back stud structure and a thermal break anchoring fleece laminated to the underside. The matting is 5/16" (8 mm) thick. The stud structure is specifically designed to secure DITRA- HEAT-E-HK electric floor heating cables. The thermal break fleece reduces heat loss to the substrate while improving floor warming response time. DITRA-HEAT integrates customizable electric floor warming with the functions associated with DITRA: uncoupling, waterproofing, vapor management and support to ensure a long lasting installation.

Uncoupling and waterproofing membrane with thermal break (5/16" - 8 mm)

Patent pending

PRODUCT & ORDERING INFO 27

Schluter??-DITRA-HEAT-E-HK-RK Repair Kit

The DITRA-HEAT-E-HK-RK heating cable repair kit is used to make one repair to the heating portion (gray section) of the DITRA-HEAT-E-HK cable in the event of damage such as cuts by other trades.

Repair kit for Schluter??-DITRA-HEAT-E-HK Heating Cables

Schluter??-DITRA-HEAT-E-RSD

DITRA-HEAT-E-RSD is a digital thermostat to control the DITRA-HEAT-E-HK heating cables (either 120 V or 240 V). The thermostat features a 5 mA built-in ground fault circuit interrupter (GFCI) with indicator light. DITRA- HEAT-E-RSD features more than 250 pre-set programs and anticipated start function. A floor temperature sensor is included. Multiple heating cables may be connected to the thermostat, up to the total heating load limit of 15 amps.

Digital thermostat with remote floor temperature sensor

Schluter??-DITRA-HEAT-E-KIT

The DITRA-HEAT-E-KIT is an all-inclusive package containing the DITRA-HEAT uncoupling membrane, heating cable, and DITRA-HEAT-E-RSD programmable thermostat.

Kit containing all necessary components

Schluter??-KERDI-BAND

KERDI-BAND is a waterproofing strip used to seal butt joints and floor/wall connections with the KERDI and DITRA membranes.

Note: 1 mil = 1 one-thousandth of an inch

28 PRODUCT & ORDERING INFO

Schluter??-KERDI-FLEX

KERDI-FLEX is a flexible polyethylene waterproofing strip used to seal movement joints over DITRA-HEAT in specialty applications where large movements are expected (e.g., over expansion joints).

Note: 1 mil = 1 one-thousandth of an inch

Schluter??-KERDI-KERECK-F

KERDI-KERECK-F are preformed, seamless corners made of KERDI for waterproofing inside and outside corners.

Schluter??-KERDI-FIX

KERDI-FIX is a single-component sealing and bonding compound with a silane-modified polymer base. It is odor-neutral, UV- and weather-resistant, and contains no solvents. KERDI-FIX is elastomeric and bonds well to most materials, such as wood, stone, concrete, metal, glass, and many plastics. KERDI-FIX is suitable for the bonding of KERDI waterproofing membrane to vertical sections of floor/wall transitions that will not accept a bond to unmodified thin-set mortar.

Schluter??-DITRA-ROLLER

Used to embed DITRA membranes in the bond coat during membrane installation. The lightweight DITRA-ROLLER features a 14-1/2" (37 cm) wide roller and a shelf for placing 50 to 75 lbs of weight (e.g., bag of thin-set mortar or grout, box of tiles, etc.). Between uses, it can be conveniently disassembled for transport and storage.

Used to embed uncoupling membranes in the bond coat

PRODUCT & ORDERING INFO 29

HEATING CABLE TESTS LOG

Validation for warranty coverage

Each heating cable is subject to factory quality control. However, damage to the cables may happen after the product leaves the factory. In order to ensure that the cable quality remains unchanged throughout the installation process and for warranty purposes, tests must be conducted while the cable is still on the spool and during two specific subsequent steps. Measurements must be recorded in the table below and compared to initial measurements taken when the cable was on the spool in order to enable you to detect any changes related to the electrical property of the cable. Any installation-related cable damages are not covered by the warranty. See page 17 in this DITRA-HEAT Installation Handbook for complete heating cable testing instructions.

The homeowner/end user must submit a copy of the completed heating cable tests log, including ???Test 1: Conductor Resistance,??? ???Test 2: Conductor and Ground Braid Continuity,??? and ???Floor Temperature Sensors Test???, with the warranty registration card within 14 days of installing the product to qualify for resolution for failure of the Schluter??-DITRA-HEAT-E-HK heating cables within the Schluter??-DITRA-HEAT & Schluter??-DITRA-HEAT-TB Limited System Warranty for ten (10) years. Completion of ???Test 3: Insulation Resistance,??? in addition to those listed above, will extend the term for resolution for failure of the Schluter??-DITRA-HEAT-E-HK heating cables within the Schluter??-DITRA-HEAT & Schluter??-DITRA-HEAT-TB Limited System Warranty from ten (10) years to fifteen (15) years. Registration can be completed by mail or online at www.schluter.com/registerwarranty.

Completion of warranty registration qualifies customers for the system warranty, in which Schluter??-Systems shall a) reinstall or replace the failed portion of the floor covering assembly or b) pay an amount not to exceed the original square foot cost of the installation of the floor covering assembly verified to be defective.

Failure to complete this warranty registration will result in a twenty-five (25) year Limited Product Warranty that the Schluter??-DITRA-HEAT-E-HK heating cable purchased shall be free from defects in material and workmanship effective on the date of purchase by or for the original purchaser. The maximum liability of the company, in this case is limited to the cost of the original cable multiplied by the percentage of the warranty period remaining.

Homeowner/end user must retain this heating cable tests log for warranty purposes.

Heating Cable Tests Log

Test 1: Conductor Resistance Test

Readings must fall within 10% of the factory value printed on the silver heating cable identification tag.

Test 2: Conductor and Ground Braid Continuity Test

Infinity (I) or

Overload (OL)

Test 3: Insulation Resistance Test

* Allow the assembly to cure for 7 days after grouting before putting the floor warming into service. **1 Gigaohms = 1 G ohms = 1000 M ohms = 1000 Mega ohms

30 HEATING CABLE TESTS LOG

WARRANTY

Schluter??-DITRA-HEAT and Schluter??-DITRA-HEAT-TB 10-Year Limited System Warranty

COVERAGE AND CONDITIONS: Subject to the conditions and limitations as stated hereinafter, Schluter??-Systems* warrants that the Schluter??-DITRA-HEAT system (the ???Products???)** will meet all composition and performance criteria for a period of ten (10) years from the date of purchase only when the Products are used and installed in accordance with the terms and conditions of the Schluter??-DITRA-HEAT Installation Handbook and industry standard guidelines that are not in conflict with the Handbook in effect at the time of installation. Further, efflorescence is considered to be a natural occurrence with cementitious materials and is therefore not considered to be a defective condition and is not covered by this warranty. It is the responsibility of the owner/ builder/ installer to ensure the suitability of all building materials and all associated building materials for the owner???s intended use. It is recommended that the owner consult with an experienced and professional installer. This warranty is conditioned and will be considered null and void and Schluter??- Systems will have the right to refuse any claims if: (a) the Products have been improperly stored or installed, (b) any Schluter product comprising the system has been altered or otherwise modified in any way without the prior written authorization of Schluter??-Systems, (c) the Products are subject to abusive or abnormal use, lack of maintenance, or use other than that for which the Products were manufactured, and (d) the nameplate numbers have been removed or modified from any applicable parts (wire), and (e) the homeowner/end user fails to return a copy of the completed heating cable tests log with the warranty registration card. Homeowner/end user(s) is responsible to return the warranty registration card with the logs, which may be by mail or www.schluter.com/registerwarranty. (It is AN INSTALLATION REQUIREMENT THAT the heating cable tests log be completed by the installer at time of installation and a copy returned with the registration card. We recommend the original logs be retained by homeowner/end users.)

RESOLUTION: Upon return of the registration card with the heating cable logs*** and compliance with all the aforementioned conditions, if the Products fail to meet this warranty, then the owner???s exclusive remedy and the sole obligation of Schluter??-Systems, at its election, shall be to a) reinstall or replace the failed portion of the floor covering assembly or b) pay an amount not to exceed the original square foot cost of the installation of the floor covering assembly verified to be defective. Floor covering assembly is defined to include all DITRA-HEAT materials (e.g., matting and heating cables), non-reusable flooring surfaces, and the appropriate setting and grouting materials. Further, due to conditions beyond the control of Schluter??-Systems (e.g., color and shade availability, discontinuation, normal wear and tear), Schluter??-Systems cannot guarantee or warrant an exact match to the specific tile, stone, or other flooring materials used in the installation. In such events, substantially similar materials may be substituted. This warranty does not cover scratches, dents, corrosion or discoloration caused by excessive heat, chemical cleaning products and abrasive agents. This warranty does not cover the cost of disconnection or installation.

In the event that the registration card and or heating cable tests log is not completed and returned then the Schluter??-DITRA-HEAT-E-HK heating cable shall be subject to a twenty-five (25) year Limited Product Warranty that each Schluter Heating Cable purchased shall be free from defects in material and workmanship effective on the date of the purchase by or for the original purchaser. The maximum liability of the company is limited to the cost of the original Cable multiplied by the percentage of the warranty period remaining.

DISCLAIMER: THERE ARE NO WARRANTIES BEYOND THIS EXPRESSED WARRANTY AS STATED ABOVE. ALL OTHER WARRANTIES, REPRESENTATIONS

OR CONDITIONS, EXPRESSED OR IMPLIED, ARE DISCLAIMED AND EXCLUDED, INCLUDING WARRANTIES, REPRESENTATIONS OR CONDITIONS OF

MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE ARISING BY STATUTE OR OTHERWISE BY LAW OR FROM A COURSE OF DEALING OR

USAGE OF TRADE. SCHLUTER-SYSTEMS EXCLUDES AND IN NO EVENT SHALL HAVE ANY LIABILITY FOR LOST PROFITS OR ANY OTHER INDIRECT, SPECIAL,

INCIDENTAL, PUNITIVE, EXEMPLARY, OR CONSEQUENTIAL DAMAGES, ARISING OUT OF OR OTHERWISE CONNECTED TO FAILURE OF THE PRODUCTS OR

FLOORING SYSTEM OF WHICH THEY ARE PART, NOR MISUSE OF THE PRODUCTS OR FLOORING SYSTEM, REGARDLESS OF ANY STRICT LIABILITY, ACTIVE OR

PASSIVE NEGLIGENCE OF SCHLUTER SYSTEMS, AND REGARDLESS OF THE LEGAL THEORY (CONTRACT OR TORT OR EXTRA-CONTRACTUAL OR OTHER),

NOR FROM ACTS OF WAR, TERRORISM, OVERVOLTAGE, FAULTY AND NEGLIGENT PENETRATION OF THE SYSTEM, FIRES, EXPLOSIONS, ACTS OF GOD,

INTENTIONAL ACTS OF DESTRUCTION OR ANY LOSSES DUE TO STRUCTURAL FAILURE OR OTHER CAUSES UNRELATED TO THE PRODUCTS OR DELAYS,

OR ANY OTHER INCIDENTAL OR CONSEQUENTIAL DAMAGES. THIS WARRANTY IS GIVEN IN LIEU OF ANY OTHER WARRANTY EXPRESSED OR IMPLIED. THE

REMEDIES CONTAINED HEREIN ARE THE ONLY REMEDIES AVAILABLE FOR BREACH OF THIS WARRANTY. THIS LIMITED WARRANTY GIVES YOU SPECIFIC

LEGAL RIGHTS; SOME STATES AND PROVINCES DO NOT ALLOW DISCLAIMERS OR OTHER RESTRICTIONS OF IMPLIED WARRANTIES, SO SOME OF THE ABOVE

DISCLAIMERS MAY NOT APPLY TO YOU.

TRANSFERABILITY: This Limited Warranty extends ONLY to the original end user (defined as original intended owner and user of the property/unit in which the installation is incorporated - herein referred to as ???Owner???) and is not transferable or assignable, unless approved in writing by the Technical Director or an Officer of Schluter??-Systems or otherwise prohibited by specific state or provincial law.

MODIFICATIONS TO WARRANTY: No changes or modification of any terms or conditions of this warranty are allowed unless authorized by written agreement and signed by the Technical Director or an Officer of Schluter??-Systems.

EFFECTIVE DATE: This warranty shall supersede and replace any and all prior oral or written warranties, agreements, or other such representations made by or on behalf of Schluter??-Systems relative to the Products or the application of the Products and shall apply to any installation occurring on or after March 1, 2016.

CLAIMS ON THIS LIMITED WARRANTY: To make a claim under this Limited Warranty, the Owner must provide Schluter??-Systems with written notice within 30 days of any alleged defect in the Products covered by this Limited Warranty, together with date and proof of purchase of the Products, proof of the costs of the original installation and name and address of all installers and completed heating cable tests log, failing which this Limited Warranty shall be of no legal effect. Schluter??-Systems reserves the right at its election and as a condition of this Limited Warranty to inspect the alleged failed and defective condition.

*For the purpose of this warranty Schluter Systems, L.P. shall provide the warranty for end users located in the United States, and Schluter Systems (Canada) Inc. shall provide the warranty for end users located in Canada. This warranty is limited to sales of the Products made in and intended for use in the United States and Canada.

**Schluter??-DITRA-HEAT System (???the Products???): The products are defined to include Schluter??-DITRA-HEAT and DITRA-HEAT-TB matting and DITRA-HEAT heating cables.

***To qualify for resolution for failure of the Schluter??-DITRA-HEAT-E-HK heating cables within the Schluter??-DITRA-HEAT & Schluter??-DITRA-HEAT-TB Limited System Warranty for ten (10) years, complete ???Test 1: Conductor Resistance,??? ???Test 2: Conductor and Ground Braid Continuity,??? and ???Floor Temperature Sensors Test???. Completion of ???Test 3: Insulation Resistance,??? in addition to those listed above, will extend the term for resolution for failure of the Schluter??-DITRA-HEAT-E-HK heating cables within the Schluter??-DITRA-HEAT & Schluter??-DITRA-HEAT-TB Limited System Warranty from ten (10) years to fifteen (15) years.

WARRANTY 31