An upscale office building, 94 Dodge Place is on the main east-west corridor of West Omaha and houses a major producer of yellow pages and a prominent stockbroker. Its 38,160-square-foot roof includes a 4,000-square-foot upper penthouse roof over the mechanical room. A sloped, 4-foot-high EFIS-capped parapet surrounds the entire roof. The existing system was a gravel-faced four-ply built-up. Under this were two layers of urethane insulation on top of structurally sloped lightweight insulating concrete over steel decking.
Reroofing with EPDM was a possible option, but the building's maintenance engineer was concerned with the glycol coolant used by 11 large rooftop units. Though not likely, if a line burst during off hours of operation, the roof would be flooded with a solvent that could possibly compromise the membrane.