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      Max-Rib Exposed Fastened Metal Roof & Wall Panel

      Popular exposed fastener metal panel, trusted for its strength, versatility, and broad range of finish options.

      McElroy Metal’s Max-Rib delivers reliable performance with a classic ribbed look. Available in multiple gauges, substrates, and paint systems—including industry-exclusive stocked 29 GA Kynar 500® colors—Max-Rib offers durability and design flexibility in one economical panel.

      Renderings & Profiles

      Color Charts

      Great for:

      walls-icon
      WALLS
      roofs-icon
      ROOFS
      residential-icon
      RESIDENTIAL
      commercial-icon
      COMMERCIAL
      Max-Rib Panel
      Max-Rib Panel Profile
      Max-Rib Exposed Fastened Metal Roof & Wall Panel Specs at a Glance
      Panel Type
      Rib Height
      Major Rib On Center
      Cover Width
      Factory Panel Length
      Onsite Forming Available
      Substrate/Gauges
      Installation
      Finishes
      Minimum Slope
      Exposed Fastener Metal Roof & Wall Panel
      3/4"
      9”
      36"
      Up to 50' (varies by manufacturing facility)
      No
      26 & 29 GA Galvalume®; 29 GA G-100 painted
      Solid Deck or Open Framing
      Kynar 500® (PVDF); Silicone Modified Polyester (SMP); Galvalume® Plus (acrylic-coated)
      1:12 with sealant; 3:12 without sealant

      Max-Rib Ideal Applications

      • Residential, agricultural, and light commercial roofing and wall systems.

      • Post-frame and utility buildings that require economical, long-lasting protection.

      • Retrofit or new construction where color choice, value, and speed of installation are priorities.

      • Architectural accents and siding where consistent rib spacing and wide color selection enhance curb appeal.

      See 3D Textures Here
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      Max-Rib Panels in Clay
      Max-Rib Panel
      Max-Rib Panel
      Max-Rib in Colonial Red
      Blunier-Max-Rib_Char-MB-1
      Max-Rib Panel in Ash Gray and Autumn Red
      Max-Rib
      Max-Rib Panel

      Max-Rib Top 3 Benefits

      1. Industry-Leading Substrate, Finish, & Gauge Options: Offered in bare Galvalume®, G100 galvanized, Silicone-Modified Polyester (SMP), and premium Kynar 500® (PVDF) paint systems in both 29- and 26-gauge steel—with in-stock Kynar color availability that’s unique to McElroy Metal.

      2. Proven, Workhorse Performance: The ¾" rib profile and 9" rib spacing provide reliable spanning strength and weather resistance across decades of service.

      3. Long-Term Durability and Visual Appeal: Kynar 500® (PVDF) coating on Galvalume® substrate offers industry-leading fade and chalk resistance with exceptional gloss retention for decades of performance. For price sensitive projects, Silicone Modified Polyester (SMP) coating over Galvalume® substrate offers dependable protection and color retention.

      Color Charts

      Max-Rib and Mesa Color Chart (by Plant) Standard Color Chart

      CAD Drawings

      Max-Rib/Mesa Base Drip Detail Max-Rib/Mesa Eave Detail Max-Rib/Mesa Eave with Gutter Detail Max-Rib/Mesa End Lap Detail Max-Rib/Mesa Hip Detail Max-Rib/Mesa Hi-Side Tie-In Detail Max-Rib/Mesa Inside Corner Detail Max-Rib/Mesa Lower Gambrel Detail Max-Rib/Mesa Overhead Door Header Detail Max-Rib/Mesa Overhead Door Jamb Detail Max-Rib/Mesa Outside Corner Detail Max-Rib/Mesa Rake Detail Max-Rib/Mesa Rake Tie-In Detail Max-Rib/Mesa Ridge Detail Max-Rib/Mesa Sculptured Eave Detail Max-Rib/Mesa Upper Gambrel Detail Max-Rib/Mesa Wall Splice Detail Max-Rib/Mesa Window / Door Jamb Detail

      PDF Drawings

      Max-Rib/Mesa Rake Detail Max-Rib/Mesa Rake Tie-In Detail Max-Rib/Mesa Ridge Detail Max-Rib/Mesa Sculptured Eave Detail Max-Rib/Mesa Upper Gambrel Detail Max-Rib/Mesa Wall Splice Detail Max-Rib/Mesa Window / Door Jamb Detail Max-Rib/Mesa Base Drip Detail Max-Rib/Mesa Eave Detail Max-Rib/Mesa Eave with Gutter Detail Max-Rib/Mesa End Lap Detail Max-Rib/Mesa Hip Detail Max-Rib/Mesa Hi-Side Tie-In Detail Max-Rib/Mesa Inside Corner Detail Max-Rib/Mesa Lower Gambrel Detail Max-Rib/Mesa Overhead Door Header Detail Max-Rib/Mesa Overhead Door Jamb Detail Max-Rib/Mesa Outside Corner Detail

      Spanish Installation Manuals

      Max-Rib/Mesa Installation Manual

      English Installation Manuals

      Max-Rib/Mesa Installation Manual Thru-Fastened Panel

      Brochures/Flyers

      Camouflage Coating Flyer Max-Rib Brochure MoistureLok Flyer Performance Flyer Residential Brochure ThermoForming flyer 2025 Product Catalog

      Metal Panel Care & Maintenance

      Operation and Maintenance Manual (Roofs)

      Product Data Sheets

      Max-Rib Product Data SikaLastomer® 511 Product Data

      Product & Trim Information Books

      Max-Rib, Mesa, Matrix Product Information Book

      SDS - Substrate & Paint

      Galvalume® Substrate Galvanized Substrate Paint - Ash Gray  Paint - Brandywine  Paint - Charcoal  Paint - Evergreen  Paint - Hartford Green  Paint - Matte Black Paint - Patrician Bronze Paint - Regal White Paint - Roman Blue Paint - White Backer  Paint Pens - Kynar® Paint Pens- Kynar® ADS Data

      Specifications

      Max-Rib

      UL 580 Construction Numbers

      Max-Rib #560 (plywood)

      Approvals

      Fire Resistance (UL263) Ratings Fire Resistance (UL790) Ratings Florida Product Approvals Non-Structural Florida Product Approvals Structural Impact Resistance (UL 2218) Class 4 Texas Department of Insurance Windstorm Approvals

      Miscellaneous Information

      Max-Rib 26 Ga. Wind Fastening Table

      Finish and Substrate Warranties

      Standard Galvalume® Standard Fluropon® Kynar 500® PVDF without Substrate Standard Silicone Modified Polyester Coating (SMP) & Crinkle Finish without Substrate Standard Silicone Modified Polyester (SMP) & Crinkle Finish with Galvalume® Substrate Standard Fluropon® Kynar 500® PVDF with Galvalume® Substrate Project Specific Galvalume® Project Specific Fluropon® Kynar 500® PVDF with Galvalume® Substrate Project Specific Silicone Modified Polyester (SMP) & Crinkle Finish with Galvalume® Substrate Project Specific Fluropon® Kynar 500® PVDF without Substrate Project Specific Silicone Modified Polyester Coating (SMP) & Crinkle Finish without Substrate

      Compare our Metal Panels Using the Tool Below

      For information on all McElroy Metal products, visit our full product library .

      Panel
      Seam Type
      Rib Height
      Panel Widths
      Minimum Slope
      Install Substrate
      Clips
      Substrate / Gauges
      Coating
      Notable Approvals / Tests
      Max-Rib Exposed Fastened Metal Roof & Wall Panel
      Exposed Fastened Wall & Roof
      3/4"
      36"
      1:12 with sealant; 3:12 without sealant
      Solid Deck or Open Framing
      N/A
      26 & 29 GA Galvalume®; 29 GA G-100 painted
      Kynar 500® (PVDF); Silicone Modified Polyester (SMP); Galvalume® Plus (acrylic-coated)
      UL 263 Class A; UL580 Class 90; UL 2218 Class 4; Florida Product Approval; TDI (over Plywood Deck)

      For information on all McElroy Metal products, visit our full product library .

      Panel
      Seam Type
      Rib Height
      Panel Widths
      Minimum Slope
      Install Substrate
      Clips
      Substrate / Gauges
      Coating
      Notable Approvals / Tests
      Max-Rib Exposed Fastened Metal Roof & Wall Panel
      Exposed Fastened Wall & Roof
      3/4"
      36"
      1:12 with sealant; 3:12 without sealant
      Solid Deck or Open Framing
      N/A
      26 & 29 GA Galvalume®; 29 GA G-100 painted
      Kynar 500® (PVDF); Silicone Modified Polyester (SMP); Galvalume® Plus (acrylic-coated)
      UL 263 Class A; UL580 Class 90; UL 2218 Class 4; Florida Product Approval; TDI (over Plywood Deck)

      Max-Rib Substrate and Coating Choices

      McElroy Metal offers more Max-Rib choices than most manufacturers, giving contractors and building owners the ability to match budget, performance expectations, and aesthetic requirements without changing panel profiles. Whether you need premium fade resistance, dependable everyday performance, or an economical option for interior applications, the Max-Rib family provides consistent quality across a full range of substrates and coating systems.

      Max-Rib product options comparison
      Product Substrate Coating System Best Use
      Max-Rib Ultra Galvalume® Kynar 500® (PVDF) Premium agricultural, residential and commercial projects where long-term color retention and durability are top priorities
      Max-Rib II Galvalume® Silicone Modified Polyester (SMP) Versatile choice for residential, light commercial, and agricultural applications that prioirtize budget.
      Max-Rib 100 Galvanized G100 Silicone Modified Polyester (SMP) Projects, like animal confinement, that require a galvanized substrate
      Max-Rib Commodity / Liner Galvanized Economical 10-year finish Interior liner panels, sheds, shade structures, and basic shelter applications

      Helpful Videos

       Learn how Max-Rib panels are installed and see the key features that make them one of the industry’s most popular exposed-fastener solutions. These short videos provide a clear look at performance, applications, and installation details. 

      Thermoforming

      thermoforming-warranty-1

       

      Long-term customer satisfaction is our top priority at McElroy Metal. As a result, we're constantly looking for ways to do things better, even if it means making investments in new equipment.  Thermoforming (or warm forming) is just one example of our customer commitment.

      Traditionally steel panels have been manufactured from steel at room temperature.  While that process worked for decades, new advances have proven that warming the steel prior to production can result in a better product with a longer life expectancy for Silicone Modified Polyester (SMP) paint systems.  

      Thermoforming technology is just one more thing we're doing different than our competitors to earn your business. 

      Read More About Thermoforming Metal Panels

      Factory Applied Anti-Condensation Membrane

      Max-Rib roof panels with McElroy's MoistureLok, offer a great option to address condensation challenges.  The design of our MoistureLok product traps moisture and then releases it back into the air as natural humidity once conditions go back below the dew point. 

      Learn More
      moisturelok-logo-2026
      Peachtree Solar-501-1

      Notes & Manufacturing Locations

      • Manufactured in: Bossier City, LA; Marshall MI; Winchester, VA; Adelanto, CA; Lewisport, KY; Merkel, TX; Mauston, WI; Asburn, GA; Diamond, MO

      • Available with MoistureLok anti-condensation membrane

      • McElroy Metal is one of the few manufacturers to use thermoforming technology for SMP painted panels to reduce micro-fracturing during forming and enhance overall panel performance.

      • Inquire for other gauges and substrates; minimum quantities may apply

      • Oil canning is a natural occurrence in metal panels and not a cause for rejection.

      McElroy Logo Emp Ownd Opt1_BLK-RED

      Why Choose McElroy Metal

      McElroy Metal is an employee-owned manufacturer with more than six decades of experience producing high-quality metal roofing, wall systems, and substructural components. Our nationwide manufacturing and service center network ensures consistent availability, responsive support, and dependable delivery. Built on a culture of craftsmanship and partnership, our products are engineered for long-term durability and trusted performance on projects of every size.

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      Find a Distributor / Contractor Near You

      Whether you’re building a new home or planning renovations, a metal roof can deliver long-term cost savings and comfort. To explore your options and find the product that meets your aesthetic and budgetary needs, contact a McElroy Metal distributor or contractor in your area today. We can’t wait to help make your dream home a reality.

      Find a Contractor

      Frequently Asked Questions

      The questions below address common considerations and help guide product selection for your project.

      What makes Max-Rib different from other exposed fastener panels?
      Max-Rib is available in multiple gauges, substrates, and paint systems—and McElroy Metal is the only manufacturer stocking an extensive selection of 29 GA Kynar 500® (PVDF) colors, providing premium performance at an economical price
      Can Max-Rib be used for walls as well as roofs?
      Yes. Max-Rib performs exceptionally well on roofs, walls, and accents, offering design consistency across the entire structure.
      What coating systems are available?
      Kynar 500® (PVDF) systems offer unparalleled resistance to color fade and chalk. Choose from SMP, or Kynar 500 paint systems to match project requirements and budgets.For non-painted applications, we offer Galvalume® Plus (acrylic-coated).
      Why choose McElroy Metal’s Max-Rib over similar panels?
      McElroy Metal not only manufactures Max-Rib nationwide but also maintains extensive in-stock color inventories, ensuring shorter lead times, consistent quality, and unmatched selection
      Is Max-Rib suitable for animal confinement or high-moisture environments?
      Yes. McElroy Metal offers Max-Rib with a G100 galvanized coating specifically for agricultural and confinement structures where enhanced corrosion resistance is required.
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