Ultra-Max® HD

1/2” High Density CoverBoard

Rmax Ultra-Max® HD is a high density roof cover board composed of a closed-cell polyisocyanurate (polyiso) foam core bonded to inorganic polymer coated glass fiber mat facers on both sides. Ultra-Max® HD is approved for use in insulated roofing system constructions of new and re-roofing applications.


  • Fully adhered single-ply
  • Mechanically attached single-ply
  • Loose laid ballasted single-ply