Concrete Slab Prep For Tile

Pour the thinset in any cracks to about 1 4 inch 0 6 cm above the floor surface.

Concrete slab prep for tile.

Identify and fill any cracks in the concrete. Rather than using cement boards cbus the favored method is to use an uncoupling membrane. Patch little cracks or holes with a cement patching compound. Mix thinset mortar with water in a bucket according to package instructions.

Before you begin to lay the tile over your concrete slab make sure the concrete is properly prepared. How to prepare concrete for a tile installation 1. Never lay tile over a damaged concrete floor without repairing it or your tiles may crack or lift. There are different kinds to choose from.

How to prepare for laying tile over a concrete floor things you will need. Tsp is a high strength cleaner which is useful for removing dirt grease and oil from your existing surface. If you attach the tile to concrete you need to take special precautions by uncoupling the tile from the concrete. Crack isolation membranes keep imperfections in the concrete slab from spreading up to the tile.

Lay down a sheet of crack isolation membrane before tiling if your concrete floor is severely damaged or aged. Don t lay tiles on a concrete slab with cracks that appear to be spreading or irregularities that prevent you from leveling it. With a trowel scoop out and spread enough mortar on. With the cracks patched apply a latex modified crack resistant thin set.

Before you get to work take the time to gather the supplies and tools you ll need. Cracks and depressions may create weak spots that cause tile to crack in the future. Use a large bucket and. Stir the thinset thoroughly with a trowel.

Masons often use a crack isolation membrane when setting tile outdoors. No matter how dirty or clean the concrete floor looks start the process by sweeping the floor. Use a trowel to apply and use the edge to ensure the patch has edges level with the surrounding concrete. 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.

Then prime the concrete see photo 2 with the recommended solution consult the membrane manufacturer s literature. Cut the membrane so it s 1 1 2 times the width of your tiles. Let the primer dry and then apply the membrane photos 3 and 4. Scrub the floor with a brush and tsp and allow it to dry thoroughly.

Follow the directions on the packaging to properly mix the thin set mortar. Use a polymer modified thin set a type of mortar to attach the backer board to the subfloor.