A cracked concrete floor in the basement or garage can be unsightly and can let in moisture or gases from the soil below. Really bad ones may indicate a problem with your home’s foundation that is worth getting checked out by a professional. You can, however, fix smaller, nonstructural cracks yourself.
Kennedy recommends a self-leveling crack-sealing compound for the job, which is a good project to take on before carpeting a basement or sealing a garage floor. The only tool needed is a caulk gun, he says, and the entire project may take a couple of hours.