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HR3 Insulated High Rib Roof System

With Nucor’s HR3 roof panel, you have an economical solution compared to field assembled high rib roofs. Your panels arrive in one piece, requiring a simple one-step installation. This 40” wide panel installs quickly by using a unique EPDM gasketed saddle washer. This washer allows you to fasten at the standing ribs, out of shed water.

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  HR3 Specifications
Thickness 2.5" 4" 5" 6"
R-Value R21 R33 R42 R50
U-Factors .050 .031 .024 .020
Width 40"
Length 8'0" minimum to 50'0" maximum
depending on solar loading
Coatings Exterior: PVDF
Interior: Imperial White (polyester)
Interior Texture Light Embossed
Insulation CFC-free foamed-in-place Polyisocyanurate foam @ 2.2 to 2.5 pcf density
Metal Facings Exterior: 26 ga galvanized steel (24 & 22 optional)
Interior: 26 ga galvanized steel
Overlapping with through fastening at standing rib
Min. Roof Pitch 1:12

R-values are derived from thermal testing per ASTM C518 @ 40°F mean and ASTM C1363 @ 35°F mean. For project specific values, please contact your sales representative.
  Download our Brochure

Panel Thicknesses: 2.5”, 4”, 5”, 6”
High Rib Insulated Roof panel
HR3 detail
Features and Benefits
  • The HR3 panels have an overlapping joint that is self-aligning, which allows for easy sealant application at the panel joinery.
  • High level of thermal R-Value leads to energy cost savings for your facility.
  • Panels arrive on-site in one piece, requiring a simple one-step installation, reducing construction time and costs.
  • Standard metal surface is 26 gauge G-90 galvanized steel, with a PVDF coating providing fade-resistant, energy efficient exterior.
  • HR3 Roof Panels are available in 2.5", 4", 5", and 6" thickness and install quickly and easily by through fastening at the standing ribs into supporting structural members.
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