Fixing ceramic tiles to SCHLÜTER®-DITRA on timber floors with UltraTile adhesive.24th March 2016
Schlüter®-DITRA acts as an intermediate substrate system on floors, prior to the fixing of ceramic and natural stone tiles with UltraTile adhesive.
As an uncoupling system it is used on timber substrates such as wood-based sheets and board where possible movement at board junctions could otherwise lead to the floor tiles cracking. Schlüter®-DITRA is also designed for overlaying timber substrates where a waterproofing system is required, in areas such as bathrooms, wetrooms and showers.
Installation of ceramic tiles to Schlüter®-DITRA on timber floors with UltraTile adhesive:
Ensure adequate underfloor ventilation.
Remove any existing floor coverings. The timber floor construction should be load bearing, clean, dry and level. Re-fix loose boards. Additional bracing should be used if the floor flexes.
Dry lay the Schlüter®-DITRA and cut to fit before adhering to the sub-floor.
Using a 3x3mm notched trowel, apply a layer of UltraTile ProFlex SP over the floorboards to a sufficient depth to secure the fabric fleece on the Schlüter®-DITRA underside of the matting.
Lay the matting into the wet/tacky adhesive and press firmly into place, abutting all edges. If a waterproofing system is required, the mat joints should be sealed with Schlüter®-KERDI-KEBA sealing band and the sealant adhesive Schlüter®-KERDI-COLL.
Select UltraTile ProFlexSP adhesive and apply into the mat surface to completely fill the dove-tailed square cavities.
Apply additional UltraTile ProFlex SP to the filled mat surface with a notched trowel that is appropriate to the size of tile being fixed, ensuring solid bedding of the tiling. Please note that the minimum tile size where Schlüter®-DITRA is used should be 50x50mm.
UltraTile ProFlex SP is a single part, rapid set tile adhesive specially formulated to achieve enhanced adhesion and flexibility where slight movement or vibration can occur.
The adhesive’s unique qualities make it suitable for fixing glass, porcelain, mosaic and ceramic tiles. It is available in grey in 20kg and 10kg sizes, and white in 20kg.
NOTE: Movement joints should be included at room perimeters or where tiling abuts fixed objects. Tile surface movement joints should be incorporated over any substrate change and in larger tiled areas, according to industry standards.
This information is intended as a guide only and should be used in conjunction with manufacturers’ current technical information and recommendations.
For further information, please call 01827 871871.