Ditra Uneven Floor

Un modified under and over the ditra.

Ditra uneven floor.

Perimeter bonded vinyl tile is unacceptable. 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. Can schluter ditra and schluter ditra xl be installed over vinyl flooring. Floor joists are 1 75 x 9 16 oc longest support span is about 12 feet.

I plan to use the thinner ditra uncoupling membrane. A seasoned floor that never sees moisture you could skip the ditra. 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 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.

Ditra is good for new concrete. First time floor diy i would like to install porcelain stone or thin brick on my 1955 kitchen and hall floor. Some limitations include the following. Yes schluter ditra or ditra xl can be installed over vinyl.

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. Ditra xl allows for ceramic tile application over single layer plywood osb subfloors on joists spaced at 24 610 mm o c. It s completely waterproof and it allows the subfloor and tile layer to move independently. Megabond from lowes or kerabond are good un modified thin sets.

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.