If your garage is sinking, you need to do something about it as soon as possible. If you see a gap under the door, or if your "man door" sticks, you might have a sinking floor. Whether you have an attached or detached garage, it's important to keep your floor level. One of the best ways to lift a floor and protect it from further damage is to jack the slab using polyurethane foam injection. Our polyurethane foam injections work by supporting the garage slab, which can then be sealed and protected from water damage.