what is ditra
Second, Ditra is a decoupler, meaning (in this case) there's no chemical bond between the tile and the subfloor. With cementboard, the tile is mortared to the cementboard and the cementboard is mortared to the substrate, so there's a chemical bond. proprietary product created by Schluter Systems, Ditra is a polyethylene decoupling membrane designed to manage movement in wood and many other types of floor systems to prevent cracking and other problems with tile installations.