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How does self-adhering roofing underlayment protect against ice damming issues?
Peel-and-stick or self-adhering roofing underlayment is specifically designed to create a watertight seal around nails and at critical junctions like eaves and valleys. In cold climates, ice dams occur when snow melts on the upper parts of a roof and refreezes at the colder eaves, causing water to back up under the shingles. Because self-adhered products bond directly to the roof deck, they prevent this standing water from leaking into the house. This specialized application is often required by building codes in northern regions to ensure long-term protection against seasonal water damage.
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