Roofing Aggregate Harmony Sand Gravel
Roofing Aggregates, • 1 inch round ballast for the one ply rubber roofs, • 3/4 inch round for special light weight rubber roofs, • 3/4 inch aggregate for the IRMA process, • 3/8 inch ( ASTM 1863 spec) for built up roofs, • 5/8 inch round for special applications, • We carry 3/8 inch spar (white marble) for built up roofs,