How To Fix Hairline Cracks In Concrete Block Walls

Manufacturers cast cinder block also known as concrete masonry units from pumice or clay and concrete to form a lightweight hollow block.

How to fix hairline cracks in concrete block walls.

Commonly rectangular concrete blocks are manufactured as a solid block of concrete or with hollow chambers. We repaired a foundation wall which had an 8 ft long crack that leaked water into the basement during periods of heavy rainfall. If you know how to fill small cracks in concrete you ll restore your concrete to a smooth finish. Inspection of the crack is done and if any oil or stains have penetrated the crack and have discoloured the concrete the stains will have to be addressed.

Repairing a foundation crack of this nature is similar to repairing other non structural cracks. Hairline cracking within concrete block walls often referred to as stair step cracking or mortar joint cracking is an example of an imperfection or distress but does not typically compromise structural integrity. Concrete blocks are often used in constructing a wide range of structures from homes to commercial properties and outdoor structures. 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.

For this project you ll need. Use an epoxy injection system for basement wall crack repair. Although concrete blocks are strong and durable cracks sometimes develop. Diagonal foundation or wall cracks in concrete block or other cmu walls foundations diagnosis repair.

To permanently patch the crack we used an epoxy injection system from polygem called the liquid concrete repair kit 60. Fill it with a caulk suitable for use on concrete. The steps involved in the repair of hairline cracks in concrete are as follows. Filling small cracks in concrete keeps them from turning into big holes.

Hairline cracking within concrete block walls is the result of internal stresses. Cracks in basement walls allow water to enter the basement which leads to mold and mildew growth. This technique will work for cracks smaller than 3 8 inch wide in the sidewalk driveway garage floor basement or steps.