Rmax Ultra Max HD High Density CoverBoard  4ft x 8ft x 0.5 in Insulation Boards
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Rmax Ultra Max HD High Density CoverBoard 4ft x 8ft x 0.5 in


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Estimated Delivery Time 5-7 Working Days

Rmax Ultra-Max® HD is a high density roof coverboard composed of a closed-cell polyisocyanurate (polyiso) foam core bonded to inorganic polymer coated glass fiber mat facers on both sides. It utilizes a CFC-, HCFC- and HFC-free blowing agent that has zero Ozone Depletion Potential (ODP)and negligible Global Warming Potential (GWP). This insulation is suitable for use in insulated roofing system constructions utilizing mechanically attached and fully adhered single-ply roofing systems. Ultra-Max® HD is approved for use in new and re-roofing applications. Ultra-Max® HD is available in 0.5” thick 4’ x 8’ panels.


  • Increased dimensional stability
  • Roof system protection
  • Lightweight and easy to handle
  • Reduces material and labor costs
  • Mold resistant per ASTM D3273 (no defacement)
Thickness R-Value
Pcs/Pallet Sq Ft/Pallet
0.5 in 2.5

Est Delivery between and .

Delivery will always take place on a weekday (Mon - Fri).
For information on delivery costs and more view our delivery info page.