Fixing Hairline Cracks In Concrete Walls

How to repair or fill small or hairline cracks in cement render walls.

Fixing hairline cracks in concrete walls.

As the name implies these cracks are very small about 0 003 inches 0 08mm in width and can be very shallow. Hairline cracking within concrete block walls is the result of internal stresses. Filling small cracks can be easy to do and sometimes hairline cracks won t need to be. However if the plaster separates from the lath or the structure of the wall it s called blown plaster and it requires a more extensive repair.

These include using simple concrete glue filling the crack with more concrete using expanding foam and even starting from scratch. Use an epoxy injection system for basement wall crack repair. If you know how to fill small cracks in concrete you ll restore your concrete to a smooth finish. To permanently patch the crack we used an epoxy injection system from polygem called the liquid concrete repair kit 60.

For this project you ll need. Using a masonry bit drill 2 54 centimeter holes about 1 5 inches from both sides of the crack s edges and 3 inches apart. There are a couple of reasons why cracks can form in plaster walls. How to repair wide cracks in plaster walls.

If a crack between the wall and floor exceeds. For wider or bigger cracks using a joint compound won t be enough to patch up the damage. Now you can move onto the actual methods of fixing a crack in the concrete. Fill it with a caulk suitable for use on concrete.

We repaired a foundation wall which had an 8 ft long crack that leaked water into the basement during periods of heavy rainfall. Some like a small hairline crack usually aren t a big deal. This technique will work for cracks smaller than 3 8 inch wide in the sidewalk driveway garage floor basement or steps. Contents causes of hairline cracks in concreteprevention of hairline cracks in concreterepair of hairline cracks in.

How to fix cracks in concrete. There are four main methods at your disposal which you can use to fix cracks in concrete. Widen the crack using a chisel and hammer to a minimum of inch and break away any deteriorating concrete the edges of the crack should be vertical or beveled in an inverted v. 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.

Hairline cracks are commonly observed in freshly placed concrete and their occurrence is owed to the phenomenon of plastic shrinkage. Do the following steps to repair bigger cracks in your plaster wall.