Schlüter-DITRA  Uncoupling mat

The Schlüter-DITRA uncoupling mat, with its functional versatility, has been tried, tested and trusted all over the world. When it comes to waterproofing, uncoupling, vapour pressure equalisation, load transfer and heat distribution, nothing parallels the DITRA mat installed under tiles. We’re always looking for new ways that we can innovate with our products and DITRA is no exception. We're now on the third version of DITRA which was redesigned to make it even easier to install.

The EasyCut gridlines make the mat even easier and faster to cut and the EasyFill design features integrated air release vents for better air circulation, which in turn make the tile adhesive quicker to spread and help it lock with the modified undercuttings of the mat.

Where to buyData sheet
  • EasyCut
  • EasyFill
Product image DITRA 1©Schlüter-Systems KG
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Cross-section drawing DITRA 1
Product image DITRA 1
Product image DITRA 2
 
 
 
 
 
 
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General product information

What this product does

Schlüter-DITRA is a polypropylene mat with EasyCut gridlines as well as square, dovetailed EasyFill recesses and an anchoring fleece laminated to the underside.

In conjunction with tile coverings, DITRA provides waterproofing, vapour pressure equalisation for underside moisture and uncoupling for problematic substrates.

The substrate must be level and load-bearing. DITRA is installed in cementitious tile adhesive that is suitable for the substrate, using a notched trowel (recommended size: 3 x 3 mm or 4 x 4 mm). The anchoring fleece on the underside of DITRA is fully embedded and the fabric bonds with the adhesive. The curing time of the adhesive must be observed.

The tile covering is installed directly over DITRA in accordance with the applicable regulations, using the thin-bed method. The cementitious tile adhesive bonds with the square, dovetailed recesses of the DITRA membrane.

Summary of functions

a) Uncoupling

Schlüter-DITRA uncouples the covering from the substrate and neutralises stresses between the substrate and the tile covering that result from various deformations. It also bridges tension cracks from the substrate and prevents them from affecting the tile covering.

b) Waterproofing

Schlüter-DITRA is a waterproof polypropylene membrane with a relatively high water vapour diffusion seal. With properly installed abutting joints and carefully sealed transitions to walls and structural elements, DITRA creates a certified bonded waterproofing assembly with the tile covering.

DITRA can be installed in accordance with the waterproofing standards 18531-5 or 18534 applicable in Germany. Water exposure classes: W0-I to W3-I. DITRA also features the national technical approval (abP) required in Germany.

The use of system-certified tile adhesives is mandatory in areas that require assemblies with a certificate of technical approval (abP in Germany). Please contact us using the details listed at the bottom of this page for further information about such tile adhesive products and the corresponding certificates of technical approval.

DITRA effectively protects the sub-structure from damage caused by permeating moisture or aggressive substances.

c) Vapour pressure equalisation

The air channels of Schlüter-DITRA, which remain open on the underside, also enable vapour pressure equalisation in case of moisture impact from below.

d) Load distribution (load induction)

Tiles installed over Schlüter-DITRA in floor areas should have a minimum size of 5 x 5 cm and a thickness of at least 5.5 mm. The adhesive-filled, square recesses of DITRA transfer mechanical stresses impacting the tile covering directly to the substrate. That makes tile coverings installed on DITRA especially durable. The tiles for the corresponding application area must be sufficiently thick and have adequate compressive stability to withstand high traffic loads (e.g. in commercial areas) or large point loads (such as concert pianos, forklifts, or shelf systems). The information and tile thicknesses specified in the ZDB information sheet "Ceramic floor coverings with high mechanical stress resistance", valid in Germany, must be observed.

Tiles in high-stress areas must be solidly embedded in the tile adhesive. The impact of hard objects must be avoided on ceramic coverings.

e) Bonded assembly

Based on the fleece fabric bonded in the cementitious tile adhesive on the substrate, and through mechanical anchoring of the cementitious tile adhesive in the square, dovetailed recesses, Schlüter-DITRA creates a strong bond between the tile assembly and the substrate. That makes DITRA suitable for wall and floor installation. Additional anchoring wall plugs may be used as needed for the attachment of wall coverings.

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Video Schlüter-DITRA - New Enhanced Features
Schlüter-DITRA - New Enhanced Features