Schluter Ditra

 

 

 

 

Material

 

Schluter-DITRA is manufactured using high-density polyethylene (HDPE), which does not rot and is highly resistant to solutions containing salts, acids, and alkalis, as well as many organic solvents, alcohols, and oils. It is manufactured to be resistance to specific stresses that can be provided if concentration, temperature, and exposure time are known. Schluter-DITRA is waterproof and resists the transmission of vapor. The material is inert, non-toxic, and physiologically safe. Schluter-DITRA also meets the American National Standard for Load Bearing, Bonded, Waterproof Membranes for Thin-Set Ceramic Tile and Dimension Stone Installations (ANSI A118.10) and is listed by cUPC.

 

Function

 

Schluter-DITRA is a polyethylene membrane with a grid structure of square cavities, each cut back in a dovetail configuration, and an anchoring fleece laminated to its underside. Schluter-DITRA is bonded to the substrate using thin-set mortar. The anchoring fleece on the underside of Schluter-DITRA is meant to be fully engaged in the mortar and provide a mechanical bond to the substrate. Tile is installed over Schluter-DITRA using the thin-bed method in such a way that the thinset becomes mechanically anchored in the square, cutback cavities of the Schluter-DITRA matting.

Schluter-DITRA is designed specifically for ceramic tile, porcelain tile and dimension stone installations. Schluter-DITRA serves as an uncoupling layer, waterproofing membrane, and vapor management layer that accommodates moisture from beneath the tile covering. Further, DITRA performs all these functions while still providing adequate support/load distribution for the tile covering.
a) Uncoupling
Tile has been successfully installed for thousands of years by incorporating an uncoupling layer, or forgiving shear interface, within the tile assembly. Schluter-DITRA provides uncoupling through its open rib structure, 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.
b) Waterproofing
Schluter-DITRA provides reliable waterproofing in interior and exterior applications. Its polyethylene composition protects the substrate from moisture penetration, which is particularly important in today’s building environment where most substrates are moisture sensitive.
c) Vapor management
The distinguishing feature of Schluter-DITRA is the existence of free space created by the configured channels on the underside of the matting. This free space provides a route for excess moisture and vapor to escape from the substrate that could otherwise cause damage to the tile layer above. Thus, DITRA effectively manages moisture beneath the tile covering. Vapor management is one of the great advantages of Schluter-DITRA.
d) Support/load distribution
Columns or pillars can support tremendous loads when placed on a solid foundation,. The same physical principle applies to Schluter-DITRA installations. Columnlike mortar structures are formed in the cutback cavities of the matting. Loads are transferred from the tile covering through these column-like mortar structures to the substrate. Since DITRA is virtually incompressible within the tile assembly, the advantages of uncoupling are achieved without sacrificing point load distribution capabilities. The ability of DITRA installations to support and distribute heavy loads while preserving the integrity of the tiled surface has been verified through extensive laboratory and field testing, including applications exposed to vehicular traffic.

 Schluter-DITRA

Uncoupling and waterproofing membrane

Item No.

Thickness

Dimensions

DITRA5M

1/8” – 3 mm

3’ 3” x 16’ 5” = 54sf

DITRA150

1/8” – 3 mm

3’ 3” x 45’ 9” = 150sf

DITRA30

1/8” – 3 mm

3’ 3” x 98’ 5” = 323sf