How To Fix Cracks In Concrete Basement Walls

Mist the wall with water and then apply a coat of thoroseal with a latex additive check on amazon.

How to fix cracks in concrete basement walls.

Before you reach for the phone take your time and inspect the crack you ve spotted. Repairing a foundation crack of this nature is similar to repairing other non structural cracks. Concrete block walls in particular can form cracks for a number of reasons. The injection process fills the crack from top to bottom from inside to outside.

Remove loose pieces of mortar by hand. 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. Mix the two part epoxy. You can t handle this cracked wall by simply filling the crack and finishing off the basement.

Use a nail to align injection points. 10d finishing nails partway into the crack spaced 12 in. Concrete wall crack repair in 8 steps step 1. To permanently patch the crack we used an epoxy injection system from polygem called the liquid concrete repair kit about 60.

Rub the crack vigorously with a wire brush to loosen and remove mortar from the interior of the crack. First scrub the crack clean of any loose concrete paint or old filler using a wire brush. We repaired a foundation wall which had an 8 ft long crack that leaked water into the basement during periods of heavy rainfall. Fill it with a caulk suitable for use on concrete.

Stair step cracks may cause cracks in other walls above or a door to rub but they don t compromise the strength of the foundation. If you only had the stair step cracks you could go ahead with your basement finish work because that type of crack is a normal sign of settling. The only way to repair foundation wall cracks successfully is by the injection process. First off brush off any loose material from the basement walls.

Scrub the crack with soapy water and rinse with clear water to remove excess dirt and oils. Injecting a typical wall crack with an epoxy or urethane resin is done under pressure pushing the material from the inside all the way to the outside.