Within this official foam insulation website, you will find information and specifications for injection foam insulation and retrofit foam insulation. We provide injection foam contractors and installers for the entire state of Maryland. Injection foam is ideal for existing homes, walls with fiberglass batting or cellulose, empty walls with cladding and behind knee walls. Other areas perfect for injection foam installations are in sloped ceilings, under roof sheathing, in concrete block walls, crawl space walls, and interior walls. MD injection foam installers service all of major MD regions, counties, and cities.