Established in 1962, Rain Proof Roofing administers various roof installation projects for residential and commercial applications. It serves a variety of contractors and individual building owners throughout Alaska. The company offers a maintenance and repair program that includes site surveys and roof inspections. Rain Proof Roofing provides built-up, shingle, shake, metal and single-ply roofing systems. It operates a full-service metal shop that specializes in the fabrication of sheet metal. It offers a range of waterproofing services, as well as installs sheet membranes and spray-applied roofing systems. The company also offers leak repair services. Rain Proof Roofing is a subsidiary of Harpoon Construction Group, which was founded in 1978.