When it comes to protecting a structure from snow, the primary focus needs to be on maintaining a moisture barrier. On many roofs, snow will slightly melt and refreeze before sliding off the roof entirely. During this period, it's vital that a roof maintains its moisture barrier during longer retention periods.
When designing your roof, make sure to focus on areas that may form ice dams. The biggest risk a metal roof may face from ice dams occurs at the joints. Using a double-seamed joint helps protect against ice dams bending and exposing a point for moisture to enter your home. Choosing a roof with a raised seam also helps to prevent snow compression and potential damage to the seam.
Bridger Steel recommends a number of our roofing panels for snow roof loads. The first option is any of our (3) Mechanically Locking Standing Seam Panels. These offer bold lines with heavy duty protection, especially when double-seamed. We also offer a non-seamed hidden fastener roofing panel. Our 1.5" & 1.75" Tru Snap Panels offer an alternative to the mechanically seamed panel that also provide substantial protection against snow loads.