What are “injection” repairs for concrete wall cracks?
Gordon from Montreal writes: I want to seal a crack in my foundation myself using an injection system. I hear there are two types of injection materials and can I do it myself? ——– Reply You are right Gordon, the two primary materials used for injection into concrete wall cracks are epoxy and polyurethane. There is also a Bentonite clay injection system but I do not recommend it as it is too easy for the applicator to fill up your weeping tiles with clay by accident. People are drawn to injection systems because it avoids the cost and trouble of digging up the soil and doing the repair on the outside of the wall, the best but most expensive way to fix a wall. Before you inject anything anywhere consider the fact that around 80 percent of all basement water leaks can be handled by getting outside water away from the foundation: rain gutters to collect the water flow from the roof, downspouts set up to get it at least 5 feet away from the foundation and landscaping that stops run-of
