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What is waterproofing under layment?

April 26, 2017layment waterproofing

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What is waterproofing under layment?

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Waterproofing under layment is installed underneath the shingles in areas where extra protection is desired. High wear areas like the valleys on the roof, around dormers, rakes, eaves and skylights are good places to put an extra barrier of protection against water leakage caused by ice damming and wind-driven rain. Waterproofing under layment is self-sealing so that it seals around nails providing a water tight barrier against moisture.