Tiling On Mdf

Can i tile over mdf board.

Tiling on mdf.

Most grout adhesive will completely stop water your best bet if you intend to keep the mdf is to tank it with something like bal wp1 tanking system this will create a water proof barrier and you can tile straight onto it preferably using the same make of adhesive grout. It is recommended to sand the floor using 80 grit sandpaper. In either case i would not use mdf myself. As jit says the mdf has sucked out the moisture from the adhesive leaving it powdery remove tiles and scrape of remaining adhesive give a rub over with course grit sandpaper p60 will do it you need to seal the mdf prior to tiling not pva though use an acrylic primer or sbr.

Bare plasterboard mdf or particleboard should be sealed. Space the field and edge fasteners correctly the top layer of plywood should be screwed down every 8 inches on the edge and every 6 inches in the field or interior section. After the tile has been sanded clean and remove all particles and dust before applying a floor leveler product to fill in grout lines and level the surface completely for the new tile application. You find that even paint will not stck without.

What type of mdf is it. The tiles are absolutely solid and after two months there is no sign of anything moving or falling off. Always be careful with mdf and water as they don t go well together. Use a thin set product to install ceramic tile over existing tiles.

If the mdf shows any sign of moving or flexing gun a nail of silcone can be used to stick the tiles as it will have a little give in it. You have got to size the mdf with a pva and water. Mdf board or chipboard can also be tiled over but not in wet or humid areas. At a minimum it should be moisture resistant better still external grade.