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Roofing underlayment is a crucial component of any roofing system, providing an additional layer of protection between the roof deck and the final roofing material, such as shingles or metal panels. Here's why it's essential and how it works:
Water Resistance: Perhaps its primary function is to serve as a barrier against water infiltration. Even if your roof covering gets damaged, the underlayment acts as a backup, preventing water from seeping into the underlying structure of your home. This is particularly important during heavy rain, snow, or ice dams.
Moisture Management: Apart from blocking water from entering, underlayment also helps manage moisture within the roof system. It allows any moisture that gets trapped within the roofing system (from condensation or leaks) to escape, preventing issues like rot, mold, and mildew.
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