Unpainted Galvalume Roof

It can also be used to replace steep slope screw down roofs with exposed fasteners.

Unpainted galvalume roof.

Selecting the right paint finish for your steel roof. Test results have qualified galvalume as an approved roof product by the u s. 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 is more corrosion resistant than galvanized steel but because aluminum provides barrier protection instead of galvanic protection scratches and cut edges are less protected.

Galvalume is a sheet steel product covered with an aluminum zinc coating. Unpainted galvalume has a lifespan up to 40 years. Galvalume is offered in both bare and pre coated versions. A low slope standing seam roof with concealed fasteners is an excellent replacement for non metallic built up and ballasted roofs.

The shiny surface provides excellent heat reflectivity which can result in lower energy demands and improved comfort. The mixture of zinc and aluminum protects the galvalume metal against corrosion and rust helping galvalume typically last much longer than galvanized steel. Galvalume may also be referred to as az 50 for painted and az 55 for unpainted sheet coil which refers to the coating weight. Which bring us to the next metal that helps coat the steel zinc.

The reason aluminum was chosen as the one of the metals to coat the steel was. Bare unpainted galvalume has undergone extensive testing by the oak ridge national laboratory ornl to determine its solar reflective performance. Aluminum helps prevent corrosion which is highly valuable for a roof that you want to last a long time. Galvalume uses an alloy of 45 zinc 55 aluminum to create an extra durable panel is ideal for roofing and siding.

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. For non residential roofing low slope concealed fastener standing seam roofs are best made of unpainted galvalume. On newly manufactured galvalume heat. 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.