Cushioned vinyl is unacceptable.
Ditra uneven floor.
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.
It s completely waterproof and it allows the subfloor and tile layer to move independently.
Some limitations include the following.
First time floor diy i would like to install porcelain stone or thin brick on my 1955 kitchen and hall floor.
A seasoned floor that never sees moisture you could skip the ditra.
Un modified under and over the ditra.
There are various types of tile underlayment but all serve to smooth out uneven spots in a subfloor and create an unbending layer that prevents the floor from flexing underfoot.
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.
I plan to use the thinner ditra uncoupling membrane.
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.
Multiple layers of vinyl is unacceptable.
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.
Yes schluter ditra or ditra xl can be installed over vinyl.
Can schluter ditra and schluter ditra xl be installed over vinyl flooring.
Perimeter bonded vinyl tile 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.
