Distributorship and retail store services in the fields of building materials, hardware, lumber, construction materials, plumbing, HVAC, electrical and lighting supplies, home furnishings, tools, fasteners, floor coverings, [ roofing, ] gypsum, insulation, doors, windows, moldings and trim, rebar and mesh, [ lawn and garden supplies, steel framing materials, ] pipe and fittings, appliances, [ house plans, ] wall panels, wall systems, floor systems, wood decks, composite decking, stairways and stair parts, cabinets, millwork, engineered wood products, namely, i-joists, joists, beams, and headers and prefabricated wood products, namely, roof trusses, roof systems and wood floor trusses