How to Install Two-Ply Roof Underlayment: A Complete Guide to Proper Lap, Headlap, and Coverage
Proper installation of two-ply roof underlayment is one of the most critical steps in ensuring a weathertight and durable roofing system. Unlike single-ply underlayment, which provides only a single layer of protection with minimal overlap, two-ply systems are designed to deliver double coverage across the entire roof deck with additional reinforcement at the headlap. The […]
