Co-Polymer Alloy Roofs (CPA)

Co-Polymer Alloy (CPA) roofing is comprised of a single layer of white, reinforced membrane, 40-50 mils thick, typically mechanically attached to the building with plates and screws. No gravel is installed over the membrane, which provides 86% reflectivity of UV radiation.

The seams of the CPA roof system are welded together, not glued, providing a monolithic membrane upon completion. Its flexibility in re-roofing applications without tearing off the existing roof system has made it a popular choice with building owners.

CPA Benefits

• high puncture resistance for a single ply
• extremely lightweight
• 86% UV reflectivity—Energy Star rated
• significant labor savings in not tearing off old roof
• resistant to chemicals and animal fats
• no exclusion for accumulating water
• warranties do not exclude consequential damages
• odor-free insulation

CPA Drawbacks

• material & products
  are expensive
• installation over concrete
  is difficult
• very slippery when wet