Please consult the schluter ditra installation handbook before beginning your tile project to confirm the proper materials selection.
Ditra membrane over concrete.
If it s newer and has cracks i wouldn t use ditra.
Schluter ditra is specifically designed to allow the installation of ceramic and stone tile over any even and load bearing substrate.
If it damp ditra would be my choice.
Ditra over concrete floors.
The type of thin set mortar used to install ditra depends on the substrate material.
The ditra heat duo has fleece liner that results in a 70 faster floor warming response time.
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.
Depends on the condition of the slab and if it has any issues.
In addition they provide a stable substrate for tile installation on oily asphalt or extremely smooth surfaces for which adhesion is a problem.
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.
To set ditra over concrete or gypsum schluter systems recommends an unmodified thin set mortar meeting the requirements of ansi a118 1.
The best part is that it solved my issue of heat loss through the cold concrete floor.
For example to set ditra over plywood or osb a modified thin set mortar meeting the requirements of ansi a118 11 is used.
The integration of ditra s uncoupling waterproofing load distribution and vapor management functions makes consistent results viable.
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.
I would prefer a crack isolation mat like noble ts.
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.