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.

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