Experimental Polyurethane Foam (PUF) Roofing Systems. III. Naval Station, Roosevelt Roads, Puerto Rico, and Naval Facility, Cape Hatteras, North Carolina

摘要

This report presents information on field invesgitagions of experimental polyurethane foam (PUF) roofing systems installed at the Naval Station, Roosevelt Roads, P.R., and the Naval Facility, Cape Hatteras, N.C. The roof systems at Roosevelt Roads included three different foams applied at two thicknesses, five protective coating systems applied at thicknesses recommended by their manufacturer, and two different mineral roofing granules applied in the wet topcoat. The majority of the housing units were coated with acrylic and silicone coating systems, but urethane/hypalon, modified urethane, and butyl/hypalon elastomeric Coating systems were also used. The roofing system installed on the Galley at Cape Hatteras was acrylic elastomer coated PUF roof applied over a modified bitumen membrane. At Roosevelt Roads, the butyl/hypalon coated system weathered the best. Energy consumption at Roosevelt Roads decreased at most only 12 to 13/5 foaming the roofs. the mineral roofing granules improved weathering characteristics for the acrylic systems but not the silicones. At Cape Hatteras, one-half of the acrylic-coated roof weathered very well, while the other half showed extensive blistering.