Crack Injection & Poured Concrete Foundation
When owning a basement with a poured concrete foundation, it is typical to find cracks in the foundation walls. Often these fractures, or cracks, open wider over time due to hydrostatic pressure. Hydrostatic pressure means applying an excessive weight load to the foundation wall laterally. When water sits outside the foundation wall it makes the dirt much heavier which can open these cracks up larger, and at this point, the cracks begin to allow water to pass through. Typically, these fractures will be widest at the top of the wall and taper as they approach the footing. This is due to the bottom of the wall being structurally tied to the footing and not allowing as much movement in the foundation wall.
Crack Injection: Leaking Crack Repair
The repair for a leaking crack in a poured concrete foundation wall is a polyurethane crack injection . This repair has become an industry standard practice with a few varying techniques to complete the repair. At Schmitt Waterproofing, we use a low-pressure crack injection to complete the repair. This allows us to inject the leaking crack in the foundation wall without having to drill into the foundation wall. The repair process begins with setting ports over the surface of the fracture approximately every 8-10” and sealing the surface of the crack all the way up. Once the crack has been prepped and surface sealed, the fracture is flushed out and cleaned, and then the polyurethane is injected into the crack to complete the repair. The polyurethane pushes its way all the way through the 9” thickness of the poured concrete foundation wall to form a watertight seal.
Water and Sewer Line Penetration Leaks
Any cracks or openings in the foundation wall can allow water to find its way into your basement. This commonly occurs where the main water service line or sewer line passes through the foundation wall. If you have rainwater entering your basement through either of these penetrations in the foundation wall, we can help. The repair for this is very similar to a polyurethane crack injection. We perform a low-pressure injection to complete the repair. Injecting the leaking area in the foundation wall without drilling into the foundation wall is a benefit. The repair process begins with setting ports around the pipe; once the site is prepped and the surface sealed, the area is flushed out and cleaned. We then inject the polyurethane into the area to complete the repair. The polyurethane pushes its way through the 9-inch-thick poured concrete foundation to form a watertight seal.
Examples of Crack Injection, Polyurethane Crack Injection, Penetration Leaking, and Leaking Crack
Frequently Asked Questions
Polyurethane injections are used to completely fill and seal flaws or openings in poured concrete foundation walls with a waterproof material to ensure that no water may pass through.
Most single injections range from $1,000-$1,500 but can vary greatly based on the size and if they have previously installed failing coatings such as hydraulic cement.
The process starts with cleaning and prepping the wall surface to ensure a good repair. Once this is completed our ports are layed out and epoxied into place, the entire face of the crack or other flaws are then sealed with the epoxy to ensure the polyurethane can expand and fill inside the area. Once the epoxy is installed and cured the polyurethane is pushed into the foundation via the injection ports until the flaw is filled and sealed.