Metal Roof Underlayment Explained: Types, Warranties & Suggestions

Not all roofing underlayments are created equal. In this episode of The Metal Roofing Channel, metal roofing expert Thad Barnette sits down with Sheffield Metals’ Technical Director, Jeff Hock, to break down everything you need to know about underlayments for metal roofing systems.

We cover:
→ What roofing underlayment actually does
→ The 4 main types of underlayments (felt, synthetic, peel & stick, and fire‑rated)
→ How slope and climate affect underlayment choice
→ Key details to look for in warranties, walkability, and manufacturer specs → Tips for homeowners when talking to contractors about underlayment

Questions we answer:

→ What is roofing underlayment?
→ Why is underlayment important?
→ Types of underlayment (felt, synthetic, peel‑and‑stick, fire‑rated)
→ Dozens of brands: Which one is right for my house?
→ High temp vs. synthetic vs. peel & stick recommendations
→ What should I ask my contractor about underlayment?
→ Warranties: What should homeowners look for?
→ Key performance details: fastener seal, walkability, thickness, adhesion
→ Installation considerations & temperature limitations
→ How do you pick the best underlayment brand?
→ Pricing: How much does underlayment cost & what matters most?

If you’re considering a new standing seam or metal roof, this guide will help you understand how to choose the right underlayment for long-term performance.