Repairing Cracks In Concrete Block Walls

A very straight vertical crack in a concrete block foundation wall extending from the basement floor slab to the top of the foundation wall.

Repairing cracks in concrete block walls.

The secret to fixing wide concrete cracks is to undercut the sides of the crack to give it an inverted v shape. Hose the wall down or scrub it with a washcloth then use a metal file to smooth out any rough edges. How to repair wide concrete cracks. A concrete block wall whether outdoors or otherwise can suffer damage due to weather flooding or accident.

Fill it with a caulk suitable for use on concrete. Details about the causes of vertical cracks in concrete block walls and the possible causes and need for remedy or repair for this crack damage are discussed. If a crack between the wall and floor exceeds. Although concrete blocks are strong and durable cracks sometimes develop.

At vertical cracks in block walls. Readily available materials can fix some cracking in a block wall without having to tear it down and add new concrete follow the instructions below and take care of this damage before it can cause problems. Some cracks are just annoyances while others are symptoms of a larger problem and with a little bit of know how you can tell the difference. Fill the crack with mortar using a small sharp trowel to force the mortar into the full depth of the crack.

Commonly rectangular concrete blocks are manufactured as a solid block of concrete or with hollow chambers. Manufacturers cast cinder block also known as concrete masonry units from pumice or clay and concrete to form a lightweight hollow block. Repairing a foundation crack of this nature is similar to repairing other non structural cracks. We repaired a foundation wall which had an 8 ft long crack that leaked water into the basement during periods of heavy rainfall.

To repair small cracks or holes in cinder block walls you can use concrete. To permanently patch the crack we used an epoxy injection system from polygem called the liquid concrete repair. Treat the crack as one long joint filling cleaned out joints and the gaps in broken bricks or concrete block evenly all along the crack when the crack is solidly packed with mortar finish the surface with a jointer and the trowel. Cracks in basement walls allow water to enter the basement which leads to mold and mildew growth.

Filling a small and moderate crack is necessary to prevent unhealthy conditions in the home. Before you reach for the phone take your time and inspect the crack you ve spotted. Concrete wall crack repair in 8 steps use an epoxy injection system for basement wall crack repair. Concrete block walls in particular can form cracks for a number of reasons.