At Trust Roofing, our process is built on consistency, safety, and proven standards. This resource outlines how we install synthetic underlayment—a critical layer that protects your home from water intrusion before the final roofing system is applied. From roof deck preparation to valley protection, layering, and fastening, every step follows strict guidelines to ensure a watertight, durable foundation. We provide this so you know exactly what to expect from our crews and the level of care that goes into protecting your home.