Schluter DITRA 25 Uncoupling Membrane

Tile installation with Schlüter-DITRA. Air release vents mean filling the cavities is effortless with fewer trowel passes. Pre-formed grooves make straight and precise cutting more accessible than ever. Enhanced undercuts give an even stronger anchoring of the tile to the membrane.

Application & Function:

Schlüter-DITRA is a polypropylene membrane with EasyCut gridlines, square, dovetailed EasyFill recesses, and an anchoring fleece laminated to the underside. In conjunction with tile coverings, Schlüter-- 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 a thin-bed tile adhesive suitable for the substrate, using a notched trowel (Recommended Size: 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.

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

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.

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.
Schlüter-DITRA can be installed under 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.
System-certified tile adhesives are mandatory in areas requiring assemblies according to abP (certificate of technical approval). Please contact us at the address in this data sheet for further information about such tile adhesive products and the corresponding certificates of technical approval.
Schlüter-DITRA effectively protects the sub-structure from damage caused by permeating moisture or aggressive substances.

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.

Load distribution (load induction):

Tiles installed over 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 Schlüter-DITRA transfer mechanical stresses impacting the tile covering directly to the substrate. That makes tile coverings installed on DITRA exceptionally 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 complex objects must be avoided on ceramic coverings.

Bonded assembly:

Based on the fleece fabric bond in the thin-set mortar on the substrate and through mechanical anchoring of the thin-set mortar in the square, dovetailed recesses, Schlüter-DITRA creates a strong bond between the tile assembly and the substrate. That makes Schlüter-DITRA suitable for wall and floor installation. Additional anchoring wall plugs may be used to attach wall coverings.