Pentagon Athletic Center Green Roof

Washington, DC

Athena Construction

Lee & Associates

The Pentagon Athletic Center has provided exercise facilities for Pentagon personnel since 1946. The initial facility was replaced by a new one in 2011 that included a green roof. Unfortunately, a structural beam below the green roof later developed cracks caused by excessive soil weight. As part of the necessary repair project, Pine & Swallow was called upon to facilitate the remediation of the green roof. Tasks included design of an ultra-lightweight planting soil, review of construction documents, consultation with contractors, suppliers and government parties, as well as construction observation of soil placement and contractor operations.

Over-StructureSteep Slopes