Schluter®-DITRA-HEAT-DUO

Uncoupling membrane with integrated sound control and thermal break

Schluter®-DITRA-HEAT-DUO is an uncoupling and waterproofing membrane with an integrated bonding fleece that provides sound control, as well as a thermal break. Optionally, the system can be customized with floor heating cables to create a warm, luxurious tile floor.
  • Features integrated sound control and thermal break
  • Reduces impact sound transmission through floor-ceiling assemblies, making it ideal for multi-story construction
  • Reduces heat loss to the substrate for up to 70% faster heat-up times over concrete during temperature increase demands
  • Nominal 5/16” (8mm) thickness minimizes tile assembly thickness and reduces transitions to lower surface coverings
  • Self-leveling compounds are not required to encapsulate the cables into the membranes
  • Available by the roll or by the sheet to accommodate various room sizes
  • The stud structure of DITRA-HEAT-DUO is specifically designed to allow for the easy installation of DITRA-HEAT-E-HK heating cables
  • Quick and easy to install and few tools are required
  • Patent pending
  • Provides electric floor warming for use beneath tile, stone, or other resilient floor coverings (e.g. LVT)
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Floor Warming
Load Support
Sound Control
Thermal Break
Uncoupling
Vapor Management

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Schluter®-DITRA-HEAT-DUO integrates customizable, comfortable electric floor warming with the functions of DITRA: uncoupling, waterproofing, vapor management and support to ensure a long lasting installation. DITRA-HEAT-DUO features an integrated thermal break to reduce impact sound transmission through floor-ceiling assemblies, reduce heat loss to the substrate, and improve floor warming response time.

Sound Control

Controlling impact sound transmission through floor-ceiling assemblies in multistory construction can present challenges, particularly when ceramic and stone tiles are used. Sound control materials tend to be compressible and not all provide adequate support for tile covering in thin-set applications. DITRA-HEAT-DUO reduces sound transmission, while supporting the covering to ensure a lasting installation.

Floor Warming

DITRA-HEAT-DUO 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.

Uncoupling

Tile has been successfully installed for thousands of years by incorporating an uncoupling layer, or forgiving shear interface, within the tile assembly. DITRA-HEAT-DUO provides uncoupling through its geometric configuration, which allows for in-plane movement that effectively neutralizes the differential movement stresses between the substrate and the tile, thus eliminating the major cause of cracking and delaminating of the tiled surface.

Waterproofing

DITRA-HEAT-DUO provides reliable waterproofing. Its polypropylene composition protects the substrate from moisture penetration, which is particularly important in today’s building environment where most substrates are moisture-sensitive.

Vapor Management

The free space on the underside of DITRA-HEAT-DUO provides a route for excess moisture and vapor to escape from the substrate that could otherwise cause damage to the tile covering above. Thus, DITRA-HEAT-DUO effectively manages moisture beneath the tile covering.

Support/load distribution

When placed on a solid foundation, columns or pillars can support tremendous loads. The same physical principle applies to DITRA-HEAT-DUO installations. Column-like mortar structures are formed in and between the studs on the surface of the matting. Loads are transferred from the tile covering through these column-like mortar structures to the substrate. Since DITRA-HEAT-DUO is virtually incompressible within the tile assembly, the advantages of uncoupling are achieved without sacrificing point load distribution capabilities.

Alternate Floor Coverings over DITRA-HEAT

DITRA-HEAT is suitable for applications with engineered wood, vinyl, wood plastic composite (WPC), luxury vinyl tiles (LVT), luxury vinyl planks (LVP), stone plastic composite (SPC) tiles and planks, and laminate flooring. See the Alternate Floor Coverings over DITRA-HEAT Technical Bulletin for more information, including requirements and limitations.

All substrates must be clean, even, and load bearing. Bond inhibiting surfaces must be removed prior to the application of DITRA-HEAT-DUO. For complete installation guidelines and warranty criteria, please refer to the downloadable Schluter®-DITRA-HEAT Installation Handbook and the installation video online.

Note: Type, thickness, and format of the tile or stone surface covering must be suitable for the intended application. Minimum tile format is 2" x 2" (5 cm x 5 cm).

1. Apply thin-set mortar that is suitable for the substrate (mixed to a fairly fluid consistency, but still able to hold a notch) using the DITRA-HEAT trowel, or other 1/4" x 1/4" (6 mm x 6 mm) square-notched trowel.

2. Apply DITRA-HEAT-DUO to the floor, fleece side down. Solidly embed the matting into the mortar using a float, screed trowel, or DITRA-ROLLER, making sure to observe the open time of the bonding mortar. If the mortar skins over prior to matting installation, remove and reapply.

3. Lift up a corner of the matting to check coverage. Proper installation results in full contact between the fleece webbing and the thin-set mortar. 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.

4. Abut end and side sections of adjacent sheets. Note: Aligning the studs on the top of the matting during installation can help make subsequent heating cable installation easier.

Alternate Floor Coverings over DITRA-HEAT

Please refer to detail DH-AFC (see the Alternate Floor Coverings over DITRA-HEAT Technical Bulletin available for download below,) and the Schluter®-DITRA-HEAT Installation Handbook for complete installation guidelines. Use our DITRA-HEAT calculator to find out what products you need to complete your specific installation.

Product Table

11206-preview
24.75 KB
Floor_Warming
366.43 KB
Pdf

Handbooks

Technical Bulletin - DITRA-HEAT with Alternate Floor Coverings
3.81 MB
Pdf
DITRA-HEAT Installation Handbook
1.6 MB
Pdf
DITRA-HEAT Calculation Sheet
1.27 MB
Pdf

Data sheets

DITRA-HEAT Data Sheet
5.72 MB
Pdf

Warranties

Schluter®-DITRA-HEAT and Schluter®-DITRA-HEAT-DUO 10-Year Limited Warranty
57.36 KB
Pdf
DITRA-HEAT Thermostat Warranty
56.66 KB
Pdf
Schluter®-DITRA-HEAT System 15-Year Limited Warranty
58.74 KB
Pdf
Q:

What is the minimum stud spacing when installing the Schluter®-DITRA-HEAT-E-HK heating cables?

A:

A cable spacing of 3 studs between runs is standard. However, cable may also be spaced at continuously alternating 3 stud – 2 stud intervals in isolated...

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Q:

Can mosaic tile be used with Schluter®-DITRA-HEAT?

A:

The minimum required tile format for use with DITRA-HEAT is 2" x 2" (50 mm x 50 mm). Please call Schluter®-Systems...

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Q:

Can Schluter®-DITRA-HEAT be installed over vinyl flooring?

A:

Yes, DITRA-HEAT can be installed over vinyl. Some limitations include the following: 1- Cushioned vinyl is unacceptable...

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Q:

Can Schluter®-DITRA-HEAT be installed over hardwood flooring?

A:

We don't recommend or warranty DITRA-HEAT installation over existing hardwood flooring as it is very unstable and difficult to bond...

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Q:

I plan to install an electric floor warming system on slab on grade. Are there any available Schluter products that can act as a thermal break?

A:

We recommend using Schluter®-DITRA-HEAT-DUO uncoupling membrane...

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Spec. Guides

Product Spec Guide 2019
1.25 MB
Pdf
DITRA HEAT DUO Spec
67.05 KB
Pdf

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Watch & Learn
About the product

Schluter®-DITRA-HEAT-DUO: Membrane Installation over Concrete

Schluter®-DITRA-HEAT-DUO: Membrane Installation over Concrete

02:03
Schluter®-DITRA-HEAT: Main Functions

Schluter®-DITRA-HEAT: Main Functions

03:56
Schluter®-Systems Warranties

Schluter®-Systems Warranties

02:17
Mike Holmes on Schluter®-DITRA-HEAT

Mike Holmes on Schluter®-DITRA-HEAT

03:40

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