|Don's Home Home - Garden|
Placer County advises to clear snow from rooftops prior to incoming rains, observe signs of potential structural failure
"A snow load on a rooftop can become even heavier by absorbing rainwater, which makes a structure even more susceptible to collapse in addition to a higher likelihood of snow sliding and flooding. "
"unbalanced unloading of the snow can create unstable conditions and potential building collapse"
|snow type||density [lbs/cu ft]|
|Damp fresh snow||6.87|
|Very wet snow||46.82|
"On shingled roofs where snow dams are a problem they should NOT be installed. "
Do Snow Guards Cause Ice Dams? The quick answer is no, snow guards do not cause ice dams. A snow guard, also known as ice guards, snow stops, snow cleats, pad style snow guards, and ice cleats hold snow and ice in place to prevent avalanching or sliding off the roof onto walkways, patios, landscaping below.
theroofingco.com/blog/roofing/what-are-snow-brackets/ While snow guards and metal roofing systems go hand in hand, asphalt shingles are a different story. Shingled roofs are extremely prone to ice dam formation and the addition of snow brackets only can only worsen the risk. A lot of companies, therefore, do not recommend using this device if your roofing system is primarily comprised of tiles, shakes, or shingles.
wikipedia.org/wiki/Snow_guard A snow guard is a device used to retain snow and ice from falling from one surface to a lower one; in contemporary usage, they are installed to prevent snow/ice pack from avalanching and damaging people, plants, and property below.