Edgemont at Bethesda Metro Green Roof Replacement

A detailed survey and evaluation of the roof areas was performed for the apartment building located at 4903 Edgemoor Lane in Bethesda, MD.  The survey included a review of the original architectural and structural drawings as well as maintenance reports for the building.  The roof areas were then visually inspected in order to evaluate the condition of the single-ply PVC membrane assembly and to observe the condition of the flashings, terminations, and overall quality of the roofing construction.

The building’s roof was recommended for complete removal and replacement with a new two-ply SBS modified bitumen membrane adhered to the concrete roof slab in an inverted roof membrane assembly (IRMA) configuration. The new roof assembly design also incorporated fleece reinforced PMMA liquid flashings and increased insulation to meet new energy code requirements. To satisfy Montgomery County’s “green space” requirements, the roof replacement was designed and detailed as a green roof assembly.