ABC Supply Co., Inc. is the largest wholesale distributor of roofing and other select exterior and interior building products in North America, with over 900 locations in U.S. and Canada. ABC Supply locations offer the top brands in steep-slope residential roofing (including composite and asphalt shingles, cedar shakes and shingles, metal roofing, concrete, clay and slate roof tiles), low-slope commercial roofing, roofing insulation, solar, siding (including vinyl, cement, composite, aluminum, steel), replacement and new construction windows, exterior doors, and decking and railing.