Profile: Steelbuilding.Com, Inc. is a supplier of pre-engineered steel buildings, commercial doors and garage doors. We design steel buildings and mini-storage buildings online. We offer sectional doors, mini storage and commercial roll-up doors. Our value plus doors feature two-layer construction, an outer skin of 25-gauge galvanized steel and a 7/8" layer of polystyrene insulation board. Our stain grade doors are made with edge glued redwood, cedar or hemlock wood panels.