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- As snow settles on your roof, it insulates itself, creating a micro-environment where the bottom layer of snow closest to the roof’s surface melts due to the escaping heat from your home. This melted snow then refreezes at the roof’s edge, forcing water to back up under shingles, which can lead to water dripping into your home.
www.theroofdoctor.com/common-causes-why-your-roof-is-leaking-in-winter/
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Feb 16, 2023 · A lot of homeowners get worried when they see snow pile up on their roof—but it’s actually a good thing! If the snow isn’t melting quickly, it means that heat from your home isn’t escaping through your attic floors and then transferring from your roof to the exteriors.
Feb 6, 2024 · But if there's more than two or three feet (60 centimetres to one metre) of compacted snow on the roof, it should be cleared off.
Snow accumulates and stays on the roof longer than rain, leading to prolonged melting and refreezing, which increases the likelihood of ice dams and subsequent leaks. Rain typically runs off the roof more quickly, reducing the chance of leakage.
Jan 14, 2021 · When snow melts on the roof and then refreezes, dangerous ice dams may form, accelerating the growth of mold and mildew on the roof. Ice dams can also cause leaks or harm insulation in other parts of the home. Ice dams are more likely to form when the roof’s surface temperature is inconsistent.
A patchy or uneven layer of snow on your roof means that you don’t have enough insulation in your attic, and you also most likely have air leaks that allow warm air from your home to enter the attic, warming the underside of your roof and melting the snow.
Jun 22, 2023 · Ice dams occur when snow on a roof melt and refreezes along its edges, creating an impermeable barrier that hinders proper drainage. As water seeps into your home through leaks or structural damage caused by seepage through these dams, leaks or structural damages occur as a result.
Dec 13, 2018 · Ice dams are one of the most common causes of roof damage for Canadian homeowners every winter. They form when higher portions of your roof become warmer than areas lower down. Snow and ice on these warmer zones then melts, flows downward, hits the colder edges, and re-freezes.
