SPEC provides building contractors for both the Commercial and Residential segments, with the industries best available construction products, materials and application techniques. Trusted Products … Competitive Prices … We’ve got you covered. Roofing, Waterproofing, Coatings, Windows, Doors, Exterior Siding and much more. Check out all our product categories and contact your nearest SPEC branch for an estimate. The name to trust, and the expert support to rely on, for all your Commercial and Residential building requirements.