Ditra Uneven Floor

Ditra is good for new concrete.

Ditra uneven floor.

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. Un modified under and over the ditra. 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.

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

A seasoned floor that never sees moisture you could skip the ditra. The subfloor is 3 4 x 7 tongue and groove plank with some knots set on the diagonal. 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. First time floor diy i would like to install porcelain stone or thin brick on my 1955 kitchen and hall floor.

Megabond from lowes or kerabond are good un modified thin sets. I plan to use the thinner ditra uncoupling membrane.