How to install the Durabase CI matting system

This matting system is for floors with existing lateral movement or cracks in the substrate. It creates a waterproof and crack resistant membrane that isolates the tile from the original surface allowing you tile directly onto it and further protect your tiles from cracking due to movement in the floor.

The floor making up the foundation of your space must be dry and free of any material that would impair adhesion. It must be level and able to bear weight. In outdoor areas, the underlay slope must be dimensioned sufficiently (approx. 2%). Any possible corrections must be carried out prior to installation of DURABASE CI.

In accordance with the applicable regulations, cement screeds must be at least 28 days old before tiles are laid and must have a residual moisture level of < 2 cm %. However, hot screeds and floating screeds are also prone to deformation and the formation of cracks later on. With Durabase CI, tiles can be laid over cement screed as soon as it is possible to walk on the screed without causing damage (residual moisture approx. 4 %).

In accordance with the applicable regulations, when laying tiles, calcium sulphate screed may have a residual moisture content of max. 0.5 cm % only. With Durabase CI, tiles can be laid over calcium sulphate screeds as soon as the residual moisture content of the screed is less than 2%. The screed surface must be retreated prior to installation (sanding, priming etc.). Please follow the usual technical regulations and the manufacturers’ specifications. To bond Durabase CI matting, the use of hydraulically-setting thin bed screed to DIN EN 12004 C2 is recommended.

Concrete is subject to long-term deformation due to shrinkage. Additional stresses can also occur in concrete due to creep. With Durabase CI, shrinkage stresses are absorbed between the concrete and the tiled surface, consequently, tile laying can begin as soon as the concrete has reached a sufficient hardness level according to the concrete class. When laying CI matting on fresh concrete, corresponding technical advice on Dural’s application technique will be required.