423330 - Roofing, Siding, and Insulation Material Merchant Wholesalers US
This industry comprises establishments primarily engaged in the merchant wholesale distribution of nonwood roofing and nonwood siding and insulation materials. Cross-References. Establishments primarily engaged in the merchant wholesale distribution of wood roofing and wood siding are classified in Industry 423310, Lumber, Plywood, Millwork, and Wood Panel Merchant Wholesalers.