Original roofing trade vintage catalog for H. H. ROBERTSON COMPANY. Main office and factory was located in Pittsburgh, PA. Manufacturers of protected metal roofing, siding, flashings, general building trim and ducts. Unbound from a large 1936 architectural catalog, this unique old two page technical specifications brochure would display beautifully matted and framed. A fantastic addition to your retro roofing construction library. Pages are detached and may contain a small amount of residual glue on edge.