Department of Justice Building (DOJ) Roof

Location: Washington, D.C.

Project type: roof replacement

Client: GSA and the Department of Justice


  • sloped and flat roof systems
  • historic context

Repair and replacement of roofing on the historic 1930s Department of Justice Building, located in the Federal Triangle, involved two major systems. The systems included approximately 96,000 square feet of sloped clay tiles bordered with decorative glazed antifixae and finial tiles and 95,000 square feet of flat roof area with a red terra cotta tile deck.

The Federal Triangle site necessitated maintaining the red tile "roofscape" views available from such locations as the Old Post Office observation tower and the surrounding streets of the monumental core. Despite having been repaired and replaced less than 13 years prior, there were major problems with both the existing sloped and flat roofs. The design team researched and analyzed possible solutions in consultation with a General Services Administration historic preservation officer. The final decision was to specify a 2-inch concrete paver, integrally colored and scored on top to match the original terra cotta deck tiles.