CreteJack Concrete Leveling and Foam Jacking Littleton provides polyurethane concrete lifting and concrete repair services to residential areas in the Denver Metro Area. This is a more affordable alternative to full concrete replacement, and a higher quality and longer-lasting alternative to mudjacking. CreteJack is a family-owned concrete leveling company. We take pride in what they do and genuinely care about the community, while also striving to preserve Denver’s character. Especially those flagstone sidewalks that have been around for over a century - Yes they even level flagstone, check them out on WalkDenver!