Foundation Crack in Poured Concrete

Foundation Crack Repair

The foundation of your home is integral to the long term stability of your home. Not only does the foundation provide your home with a solid foothold, it also seals in heat and keeps out moisture. But when cracks start to appear, the efficiency and stability of your home are compromised.

Foundation cracks can happen for a number of reasons. During the construction of your home, the use of non-porous backfill like clay and organic matter will attract water over time resulting in foundation cracks during freezing and thawing; or if during the pour the concrete was not properly cured, interrupted or not poured over properly tamped crushed stone. That said, even if your foundation was built perfectly, cracks can still occur. The most common suspect is plain old water. Moisture of all kinds accumulates around the foundation causing the soil to expand. Cracks appear when the expanding soil puts pressure on the foundation walls and footings.

There are several options for foundation crack repair. One solution is called crack injections, where we fill the cracks with fast curing epoxy. We begin the process by examining the crack which needs to be repaired in the foundation wall. Next, we mark any areas on the wall where the crack is not continuous. Laying down plastic material to keep our work area clean we immediately begin working on cleaning the crack with a wire brush. On the areas where we see continuous cracks, we mark port locations every 18” starting from the bottom of the crack up to the top. For discontinuous cracks we mark the port locations just above the discontinuous crack and space the remaining ports every 18” from the discontinuous locations. Next, we begin the port installation. We detach the port cap from the side of the port and set it aside. We then dispense a small amount of fast curing epoxy onto a disposable work surface. The entire flat edge of the port is then rolled into the fast curing epoxy and pressed firmly over the crack at the marked locations. Following the port process, we fix the rest of the crack by applying the fast curing epoxy over the entire crack. We then feather the epoxy approximately 2” or more on both sides of the crack. Lastly, at the port locations, we apply the epoxy around the entire port until the port base is no longer visible. With an epoxy gun we start at the bottom port and dispense resin into the port until the resin is visibly coming out. We remove the epoxy gun and push in the cap. As we move up the wall, we repeat this process with all ports. When the epoxy has completely dried we knock the ports off the wall using a hammer.

Another solution for foundation repair is our carbon fiber crack repair process. This step can include the crack injection installation to add more strength to the foundation wall. First, we begin by marking the crack at the top, middle, and bottom of the wall. We proceed to removing 14” of concrete from the center of the crack and grind where the foundation crack repair material will be installed to achieve a bare foundation. We then fill the crack with the fast curing epoxy before we begin to mount the carbon fiber. We then measure the height of the foundation wall from the sill plate to the footer and add 6”. Next, we apply a thin layer of epoxy to the foundation wall working from the top to the bottom, covering the entire surface. Finally, we lay the carbon fiber crack repair over the epoxy ensuring the carbon fiber is completely covered. Using a squeegee, we spread the epoxy for a clean and secure installation. Lastly, we backfill the base and pour concrete over top to create a smooth uniform finish to the foundation wall and floor.

Carbon fiber wall supports as well as epoxy crack injections are a great solution for fixing foundation cracks. When going through the trouble and expense of excavating the side of your house's foundation, do it right the first time. Conterra Foundation & Repair has been repairing foundation and basement wall cracks since 1993 in Hamilton, Mississauga, Brampton, Oakville and Burlington.

If you live in the Hamilton or Burlington area, contact Conterra Foundation and Repair to request your free foundation crack inspection and quote!

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