Concrete Slab Prep For Tile

Scrub the floor with a brush and tsp and allow it to dry thoroughly.

Concrete slab prep for tile.

Masons often use a crack isolation membrane when setting tile outdoors. Let the primer dry and then apply the membrane photos 3 and 4. How to prepare concrete for a tile installation 1. No matter how dirty or clean the concrete floor looks start the process by sweeping the floor.

Mix up a bucket of tsp tri sodium phosphate solution. Cut the membrane so it s 1 1 2 times the width of your tiles. Lay down a sheet of crack isolation membrane before tiling if your concrete floor is severely damaged or aged. Mix thinset mortar with water in a bucket according to package instructions.

If you attach the tile to concrete you need to take special precautions by uncoupling the tile from the concrete. Stir the thinset thoroughly with a trowel. Follow the directions on the packaging to properly mix the thin set mortar. A sound surface is necessary when preparing concrete floor for tile installation.

Identify and fill any cracks in the concrete. Tsp is a high strength cleaner which is useful for removing dirt grease and oil from your existing surface. How to prepare for laying tile over a concrete floor things you will need. Before you get to work take the time to gather the supplies and tools you ll need.

With the cracks patched apply a latex modified crack resistant thin set. Some also keep water out of the installation area. Don t lay tiles on a concrete slab with cracks that appear to be spreading or irregularities that prevent you from leveling it. Crack isolation membranes keep imperfections in the concrete slab from spreading up to the tile.

Rather than using cement boards cbus the favored method is to use an uncoupling membrane. The substrate for tiles shorter than 15 inches must be so flat that it varies no more than 1 16 inch per foot according to the ceramic tile education foundation. There are different kinds to choose from. Cracks and depressions may create weak spots that cause tile to crack in the future.

Patch little cracks or holes with a cement patching compound. Pour the thinset in any cracks to about 1 4 inch 0 6 cm above the floor surface. Use a large bucket and. Then prime the concrete see photo 2 with the recommended solution consult the membrane manufacturer s literature.

Use a trowel to apply and use the edge to ensure the patch has edges level with the surrounding concrete. Never lay tile over a damaged concrete floor without repairing it or your tiles may crack or lift.