Protective layers installed between the roof deck and the outer roofing material.
An overview of the three main categories of roofing underlayment: asphalt-saturated felt, synthetic, and self-adhering (peel-and-stick), covering their materials, performance characteristics, and appropriate applications.
A direct comparison of synthetic polypropylene roofing underlayment and traditional asphalt-saturated felt, covering durability, water resistance, installation, cost, and warranty implications.
A self-adhering rubberized asphalt membrane installed on the roof deck in areas vulnerable to ice dams, wind-driven rain, and water backup, providing a waterproof barrier that seals around nail penetrations.
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