Roof Systems Overview AIA Test

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1) The built-up roof (BUR) consists of
From Slide #3

  1. A rubber material that is laid as one ply and typically 45-60 mils thick
  2. Alternating plies of bitumen and felts
  3. Polyurethane foam that is sprayed into place
  4. A system that has the insulation on top of the waterproofing membrane