Hydrostatic pressure on the outside of the foundation of your house can cause your basement walls to bow inward. The pressure is caused by water building up in dirt outside the foundation and not properly draining away after rain storms and snow melts. Eventually, enough water builds up on the outside of the foundation to the point where the weight of the water pressing against the foundation moves the wall inward. If you don't have the problem fixed, the wall will collapse into your basement in time. Here is how a contractor can fix a bowed-in foundation wall to keep it from collapsing into your basement.

Brace Wall

The first step will be to brace the wall to keep it from collapsing further into your basement. A contractor can use adjustable wall braces to hold the wall upright. The bottom base of the brace is screwed into the concrete floor, and the top part of the brace is leaned against thick pieces of lumber sitting flush against the foundation wall and screwed in place.

The top part and the bottom part of the brace are screwed together. There is a large nut in the middle of the brace that the contractor turns to either lengthen or shorten the brace.

Excavate Exterior of Foundation

A backhoe is typically used to dig down to the bottom of the exterior of the foundation to remove the wet dirt and expose the exterior side of the foundation wall. Once the dirt has been removed, the bracing inside the basement is lengthened until the foundation wall is returned to its normal straight up and down position.

Repair Wall

The contractor will repair any cracks in the wall using hydraulic cement. Hydraulic cement dries quickly and is harder than ordinary cement or mortar. The contractor will then apply a polymer coating over the exterior wall to create an impermeable seal against moisture damage.

Install Drain Tile

The contractor will install or repair the drain tile around the bottom of the foundation of your house to keep the water from building up in the ground outside your home. Drain tile is made of perforated PVC pipes, stones, and a permeable fabric that allows water to filter through it.

The trench is sloped so it runs downhill. Enough fabric is laid out on the bottom of the trench so the contractor can completely wrap it around the PVC pipes. The PVC pipes are laid down on top of the fabric. The fabric is wrapped around the PVC pipes so stones and dirt doesn't fall into the pipes to clog it up.

Stone is then placed over the fabric to keep the dirt from pressing down on the fabric and plugging up the holes on the PVC pipes. The trench is then backfilled with the dirt the contractor removed when digging out the trench.

The portable adjustable bracing is then removed from inside the basement and everything is cleaned up to leave you with a newly restored solid foundation wall.