Ditra Membrane Over Concrete

To set ditra over concrete or gypsum schluter systems recommends an unmodified thin set mortar meeting the requirements of ansi a118 1.

Ditra membrane over concrete.

Depends on the condition of the slab and if it has any issues. The type of thin set mortar used to install ditra depends on the substrate material. Schluter ditra and redgard uncoupling mat are two popular brands of tiling membranes that lessen the chance of concrete events becoming tile events. For example to set ditra over plywood or osb a modified thin set mortar meeting the requirements of ansi a118 11 is used.

The schluter ditra heat duo membrane is 5 16 8 mm thick compared to ditra heat at 1 4 5 5 mm thick and has 4 benefits. Uncoupling membranes are primarily designed for use over concrete slabs and subfloors especially ones with defects such as depressions or high moisture levels. Ditra is 1 8 3 mm thick which minimizes tile assembly thickness and reduces transitions to lower surface coverings e g carpet engineered wood and vinyl. I would prefer a crack isolation mat like noble ts.

The integration of ditra s uncoupling waterproofing load distribution and vapor management functions makes consistent results viable. If it s newer and has cracks i wouldn t use ditra. Ditra over concrete floors. Legend essential significant helpful uncoupling.

Schluter ditra is specifically designed to allow the installation of ceramic and stone tile over any even and load bearing substrate. Installing tile directly on concrete ceramic and porcelain tile are so frequently installed at or above grade level on a cement board underlayment or directly on plywood that it almost seems novel to install tile directly on concrete. If it damp ditra would be my choice. The combination of these four essential functions allows for the successful installation of tile over a wide range of substrates including plywood osb concrete gypsum heated floors etc.

Please consult the schluter ditra installation handbook before beginning your tile project to confirm the proper materials selection.