Exposed Fastener Panel Options
The most economical form of metal roofing, exposed fastener roofing, consists of overlapping panels that are fastened directly to the roof deck or framing through the face of the metal. They are called “exposed” because the fastener head remains visible once installed. However, fastener heads are painted the same color as the roofing panels to help make them less apparent. Most exposed fastener panels are typically 36” wide, meaning that fewer panels (and less labor) will be needed to cover the roof area.
Max-Rib is a low profile (3/4") panel that is very popular with homeowners across the country due to its aesthetic appeal and price point. This panel profile is also very common in the industry and many manufacturers offer this panel in a wide variety of steel substrates and coatings. Homeowners should make sure the product being installed on their home matches their long-term performance criteria. For residential applications, McElroy strongly recommends a Galvalume steel substrate with Kynar 500® (PVDF) coatings, which offer optimal performance and protection against fade and chalk.
Multi-Cor & M-Cor
McElroy’s R-Panel features a 1 1/4" major rib, 12 inches on center. With a bold profile, R-Panel is commonly utilized for residential roofing, primarily in the Southwestern region of the US. An optional Purlin Bearing Leg (PBR) rests on substructural framing or roof deck to provide support for fastening the panel lap.