Ardex DS 20 Decoupling Mat is a decoupling layer manufactured from polyethylene, with both sides laminated with polypropylene fleece. Ardex DS 20 Decoupling Mat is designed for renovation, new construction and to decouple tiles, slabs, natural stone and concrete pavers on internal domestic and commercial floors with loads up to 2KN/m².
Ardex DS 20 Decoupling Mat can also be used for the unbonded installation of tiles and slabs in domestic areas where there is a requirement to avoid damage to the existing sub-floor e.g. rental accommodation.
Ardex DS 20 Decoupling Mat will bridge non-moving cracks up to 3mm in width. If there are any differences in height between the cracks the area will require smoothing with the appropriate Ardex levelling and smoothing compound before the application of the matting.
Installation of tiles and slabs on top of Ardex DS 20 Decoupling Mat:
The table on the datasheet (link below) provides detailed information on sub-floor preparation and the appropriate use of primers and adhesives used in the installation of the matting.
The tiles to be installed should have a minimum size of 10 x 10cm and a minimum breaking strength of 1500 N. Ceramic floor tiles should be at least 8mm thick and natural stone should be at least 15mm thick.
We recommend the use of X78, or X78S when installing non-moisture sensitive natural stone or concrete pavers. To avoid staining or warping moisture sensitive natural stones should be installed using one of the ARDEX Natural Stone Adhesives (S27, S28, X7001 or X32).
The adhesive bed should be no thicker than 4mm on top of an unbonded layer of the matting. The adhesive bed should be no greater than 5mm on top of a bonded layer.