Unpainted Galvalume Roof

Most galvalume like galvanized steel is coated.

Unpainted galvalume roof.

Galvalume uses an alloy of 45 zinc 55 aluminum to create an extra durable panel is ideal for roofing and siding. A low slope standing seam roof with concealed fasteners is an excellent replacement for non metallic built up and ballasted roofs. Aluminum helps prevent corrosion which is highly valuable for a roof that you want to last a long time. Galvalume is a sheet steel product covered with an aluminum zinc coating.

Selecting the right paint finish for your steel roof. The shiny surface provides excellent heat reflectivity which can result in lower energy demands and improved comfort. Once corrosion has penetrated the sheet steel substrate of any steel roofing the integrity of the steel will suffer and your steel roof will begin to fall apart. Galvalume may also be referred to as az 50 for painted and az 55 for unpainted sheet coil which refers to the coating weight.

Galvalume is more corrosion resistant than galvanized steel but because aluminum provides barrier protection instead of galvanic protection scratches and cut edges are less protected. The mixture of zinc and aluminum protects the galvalume metal against corrosion and rust helping galvalume typically last much longer than galvanized steel. Test results have qualified galvalume as an approved roof product by the u s. Epa energy star program for both low slope and high slope applications.

For non residential roofing low slope concealed fastener standing seam roofs are best made of unpainted galvalume. For nonresidential roofing bare or unpainted galvalume sheet is used for low slope concealed fastener standing seam roofs ssr as a replacement for nonmetallic built up rubber and ballasted nonmetallic roofs and for steeper slope screw down roofs with exposed fasteners. Bare unpainted galvalume has undergone extensive testing by the oak ridge national laboratory ornl to determine its solar reflective performance. Uses for galvalume metal roofs walls overall galvalume is suitable as a roof wall trim accent and more in most building applications in some of the most extreme environments including hurricane zones locations with high rain or snowfall high temperature regions and more.

Galvalume metal roof and siding panels are coated with a mixture of zinc and aluminum and siliconized coating to help resist scuffs and fingerprints better than a bare metal product. The fine grained galvalume finish is more corrosion resistant than galvanized. Unpainted galvalume has a lifespan up to 40 years. The reason aluminum was chosen as the one of the metals to coat the steel was.

On newly manufactured galvalume heat.