Stair Step Cracks In Concrete Block Walls Repair

A stair step crack is a diagonal crack but since mortar is usually not as strong as concrete block or brick the crack migrates to the mortar joints as it zigzags along a path of least resistance.

Stair step cracks in concrete block walls repair.

The gaps in the wall can run in different directions but one common crack is called a stair step where the crack follows the mortar at a diagonal spreading across many blocks. In most cases you won t have to worry about the minor cracks that appear in your concrete block wall. To repair small cracks or holes in cinder block walls you can use concrete. While the sashco slab is a bit on the expensive end it s completely worth it.

Stair step cracks often indicate a foundation problem that needs repair. Specifically when constructing a concrete masonry wall a mason will commence with the construction of the leads or corners first and will. A common location for a stair step crack to occur is at the corners of wall sections where there is a transition from the block wall s lead sections to the infill sections see figure 2. Sometimes when a concrete block foundation wall cracks in response to soil pressure or settlement the cracking occurs along mortar joints between individual blocks.

First clean any parts of the wall that you plan to repair so the cement or mortar adheres securely. It delivers high quality concrete adhesion and keeps cracks sealed. Stair step concrete block walls often crack along their block lines. This chapter of the foundation crack bible discusses in detail the process of evaluating stair stepped or diagonal cracking and related signs of foundation movement or damage in concrete block walls.

The continuous pattern usually follows the grout or cement. Diagonal foundation or wall cracks in concrete block or other cmu walls foundations diagnosis repair. If you notice a stair step crack think of it in the same terms you would a diagonal crack. Stair step cracks a stair step crack looks like a flight of stairs and runs in both vertical and horizontal directions across the wall.

Sometimes a stair step crack will mostly follow the mortar joints then take a short cut through a defective block or brick before returning to the. Hose the wall down or scrub it with a washcloth then use a metal file to smooth out any rough edges. This is fixable in many cases but a professional should inspect it before you repair to ensure that the wall doesn t need to be rebuilt. These can run throughout the wall and form a stair step pattern.

The sashco slab sealant is one of the best concrete crack repair sealants you can buy.