How To Prepare Cracked Concrete Floor For Floor Leveler

The thicker floor leveling compounds that must be troweled to achieve a proper finish can t do this.

How to prepare cracked concrete floor for floor leveler.

Pour concrete etching acid over the surface and spread it with a shop broom. Or maybe you re installing a radiant heating system in a floor. Vacuum the pad using a wet dry vacuum. Here is a way how to repair patch concrete floor cracks before use self leveling compound.

Where self leveling concrete is used. In a bucket or mixing bin combine the contents of one 50 pound bag of. Fill in any large cracks or holes with concrete filler and sealer. Measure and mark the center of all four walls at floor level.

Let s say you re upgrading an old damaged concrete floor that s settled or cracked. Stick the nozzle of the concrete filler bottle into the crack and squeeze the filler out until the crack is sealed or use a trowel to press the filler into the crack. You can usually find concrete grinders at local tool rental locations. Fill seams in the subfloor with caulk.

Tape off any affected vents with painter s tape. Let the filler and sealer dry before you continue with the prep work. If you find hollows and valleys you must fill them with a self leveling underlayment. Things i mention in this vid.

Determine your starting wall. Snap the chalk line over the top of the concrete or moisture barrier between the marks on opposite walls making a cross in the center of the room. To do so of course you must first prepare the compound. When the primer has dried it s time to apply the concrete leveler.

Caulk plus silicone http amzn. Check for dips in the floor by sliding a 4 foot to 6 foot straight edge in different directions all around the room. Any dirt or residue will prevent the leveler from adhering which will result in a cracked and uneven concrete slab in the future. You will lay the flooring lengthwise to this wall.

Step 3 go over the surface with a wire brush to rough it up to help the new concrete adhere to the old.