Ditra Uneven Floor

Un modified under and over the ditra.

Ditra uneven floor.

The garage floor was very uneven so i tiled it because most of the big project was problem to work on this uneven floor when it comes welding and all. Perimeter bonded vinyl tile is unacceptable. Ditra xl allows for ceramic tile application over single layer plywood osb subfloors on joists spaced at 24 610 mm o c. Cushioned vinyl is unacceptable.

First time floor diy i would like to install porcelain stone or thin brick on my 1955 kitchen and hall floor. Ditra is good for new concrete. Can schluter ditra and schluter ditra xl be installed over vinyl flooring. It s completely waterproof and it allows the subfloor and tile layer to move independently.

Ditra xl is 5 16 7 mm thick to create an even transition between typical 5 16 7 mm thick tile and 3 4 19 mm thick hardwood flooring. I plan to use the thinner ditra uncoupling membrane. The subfloor must be free of moisture damage including rot and sponginess and must be securely fastened to the joists and squeak free don t lay tiles on a concrete slab with cracks that appear to be spreading or irregularities that prevent you from leveling it. Tile installers usually use cementboard as a tile underlayment over a standard plywood subfloor but as home flooring pros advises there are situations for which an uncoupling membrane is a better choice.

The subfloor is 3 4 x 7 tongue and groove plank with some knots set on the diagonal. Floor joists are 1 75 x 9 16 oc longest support span is about 12 feet. Yes schluter ditra or ditra xl can be installed over vinyl. Multiple layers of vinyl is unacceptable.

Before laying tile or installing a tile underlayment like schluter ditra it s important to check the subfloor to ensure a flat even surface at its worst a very uneven floor will result in broken or loose tiles and cracked grout joints. Some limitations include the following.