Fixing Cracks In Concrete Floor Before Tiling

Using a scraper and a wire.

Fixing cracks in concrete floor before tiling.

The membrane which is bonded to the slab with the same latex modified thinset that i use for installing the tile absorbs any additional movement in the concrete. How to lay tile over cracked concrete cleaning the concrete. For small narrow cracks that do not show signs of moisture use concrete filler which can be. Mix the thin set mortar according to package directions replacing the water with latex additive to give the mortar.

I cut the membrane to extend at least two tile widths on both sides of the crack. How to tile over cracked floors 1. Ensuring that the cracks are completely clean before repair is key to ensuring that the repair work will hold. And at only 0 8 mm thick the membrane can be used under almost any tile floor.

Use a chisel and hammer to undercut the crack meaning that you cut it into an inverted v shape so that the base is at least 1 inch wider than the top of the crack which will ensure that the patching compound has a solid place to flow and bond establishing a stronger hold. Force the thin set into the crack. To repair larger holes in cement undercut the area before cleaning and filling it. Cut strips of fiberglass tape designed to cover joints in cement backer board to fit over the crack.

Allow the thinset to completely dry before you seal the.