Our SL-12 panel system is a hidden fastener standing seam panel that offers easy installation for Professional roofers and DIY homeowners. It is available in 12" wide coverage and 1" high profile, with minor ribs to minimize oil canning. SL-12 works well for both roof and side panel applications. The panels snap onto each other to hide fasteners beneath, creating a clean appearance on every installation. This panel system makes any project look professional with long clean lines, while remaining an affordable product for a wide array of projects. All Colors have a Standard 40 year paint warranty. SL-12 should always be installed on solid decking to provide adequate support.