PENTAGON ROOF RESTORATION
- This project (late 1980s/ early 1990s) included maintenance, repair and replacement of 110 flat roof sections and over 400,000 square feet of slate roofing.
- Most of the original 1940s coal tar built-up roofing membranes were restored. This entailed removing the slag surfacing, patching the membrane, replacing the composition flashings and installing new gravel surfacing.
- Several newer (20-30 year old) asphalt built-up roofing membranes were torn off and replaced with new coal tar built-up roofing membranes.
- Over 100,000 missing and broken slate shingles were replaced.
- Over 40,000 square feet of asphalt shingles were torn off and replaced with slate shingles.
- All metal copings, expansion joint covers and valley flashings were replaced.
- The prime A/E was Joseph R. Loring & Associates. The architectural subconsultant, who designed an extensive replacement wood catwalk system, was Brennon Beer Gorman. The general contractor was Walsh Construction. The flat-roofing restoration subcontractor was the Conway Corporation. The sloped-roofing restoration subcontractor was the James Myers Company.