Snow loads are downward forces exerted on a structure by the weight of accumulated snow, ice and rain. Several factors affect the amount of snow that can build up on a roof, including:
- Roof Pitch, drifting, lean-tos or other low roofs that receive snow or ice sliding off roofs above them, shingles or other roof decks which do not shed snow as easily as metal roofs, and roof valleys.
- The weight of the snow on a roof also varies, in turn varying the snow loading on the roof. Ice dams can trap melting snow and rain adds more weight. Drifting snow creates excessive loads, uneven weight, and ice dams, all contributing to the instability of the roof.
So if your roof looks a little like this, consider removing the snow loads with a roof rake or hiring a professional. When you hire a professional always make sure they have proper insurance, including liability to protect you and your property, as well as workers’ compensation to protect their workers in the event of an injury. For more information on snow loads and how to remove snow from your roof to prevent it from collapsing, please subscribe to our blog or contact us.