Masonary/Maixed Substrates
Masonary consisting of brick, stone, limestone,cement block, lightweight concrete, or similar is generally a suitable substrate for Ditra. Uneven areas must be levelled in advance. Particulary in refurbishments or extensions, different materials (mixed masonry) mat be encountered. At the transition, movement can cause cracks. With Ditra, stresses and cracks do not transfer to the tile covering.

Stucco/Plaster
Plaster substrates should be examined in accordance with the applicable building codes to ensure they are dry. The surface may need to be pretreated with a primer. Ditra can be applied using thin-bed tile adhesives that are suitable for the substrate.

Synthetic flooring and surface coatings
In principle, the surface must be load bearing and prepared in such a way that a suitable tile adhesive will adhere to it and anchor the fleece on the underside of the Ditra mattinf. The compatability of the adhesive for the substrate and Ditra must be verified ahead of time.

Plywood and oriented strand board (OSB)
There materials are particularly prone to deformation under the influence of moisture (or significant change in atmospheric humidity). The ply wood or OSB panels used in construction should therefore be exterior grade.In principle, plywood and OSB can be used as backing materials for Ditra on both floors and walls in interior application. The thickness of the panels must be sufficient to ensure stability in conjunction with a suitable supporting construction. Attach the panels with screws set at the required minimum spacing, The joints must feature tongue and groove connections and should be secured with additional adhesive. Movement joints of at least 10mm must be left at the transition to other construction parts. Ditra neutralises the stresses occurring in the tile covering and prevents the penetration of moisture.

Structural plank floorboarding
Sufficently load bearing structarl plank subflooring in tongue and groove construction, with appropriate screws in place, in principle is suited as a substrate for ceramic tiles. The timber substrate should have reached the equilibrium moisture content prior to installing Ditra. However, an additional layer of plywood or OSB panels is recommended. Uneven floors must be levelled using an appropriate levelling compound.