When concrete slabs become unstable or sink, the resulting weakness can make driveways, patios, walkways, steps, and sideways unsafe. There are two possible ways to correct this type of instability: polyurethane foam concrete raising and mudjacking. While mudjacking has a longer history of being used by concrete contractors, there are appealing benefits associated with the poly foam option. Here’s how these two concrete raising solutions stack up.
What Is Mudjacking?
Also called slabjacking, mudjacking is the process of lifting or raising concrete by drilling holes into it instead of replacing it. A mixture sometimes referred to as “mud” that normally consists of water, cement, soil, and sand is placed into the holes. The mudjacking method is usually done to fill voids in a concrete slab or raise interior floors.
What Is Polyurethane Concrete Raising?
“Poly” raising is a method that fills voids and stabilizes soil by injecting foam through small holes placed in the piece of concrete that’s sinking or unstable. Connected to a delivery port, an injection gun is used to insert a polyurethane material into the affected area. The material then expands shortly after being injected to lift the concrete. It can also be used to sub-seal floors.
What Are the Pros and Cons of Each Method?
Both methods use materials that will not shrink. Also, poly and mudjacking methods have fairly equal lifting capabilities. The holes drilled for mudjacking are larger in diameter than what’s used with the poly process. Yes, poly is more of an investment than mudjacking. However, poly raising is considered cost-effective because results can last for several years with proper application. While there is some concern about possible toxicity with poly foam, the mixture is perfectly safe when correctly blended.
The type of concrete raising Illinois contractors often recommend is polyurethane foam concrete raising. It’s an alternative to the traditional mud-jacking method that appeals to many customers prefer because smaller holes are used with poly applications. A less-invasive approach to stabilizing concrete also means completed repairs will not be as noticeable. And because poly material is lightweight, it won’t overburden the soil when used to correct problems with larger slabs.