Bill Wahl Supply, based in Blackwood, N.J., is a family-owned and operated wholesale building supply business specializing in customer service. The company offers a range of exterior home building products that include roofing, siding, windows, doors, shutters, gutters, louvers, insulation, fascia, soffit and trim coil. The company s siding products include cedar impressions, natural looking cedar shingle, monogram, mainstreet and carolina beaded. Its roofing products include commercial and residential aluminum roofing and vertical siding, ridge master plus, peel n seal, fold-a-vent, slaters felt, roll vent , felt paper, power fans and louvers, CDX and OSB sheathing, gable louvers, hitachi roof nailers, hand and coil nails, roof jacks and tarps, eaveguard ice and water shield, lo-slope and self-adhering roll roofing.