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Ice dam

What happens when ice and snow thaw and refreeze at the lower edges of a roof. Ice dams sometimes result in water backing up and collecting under shingles, causing interior leaks and water...

Impact Resistant

Shingles that are created to be resistant to impacts such as from hail storms. They are usually tested and classified in accordance with UL 2218, and may be classified as Class 1 through Class 4, with Class 4 indicating the highest impact resistance...