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How Often Should You Replace Roof Underlayment? | Poinciana Pro Roofers

  • Mike Postroy
  • Jul 10
  • 2 min read
A professional roofer from Poinciana Pro Roofers removes shingles from a residential roof in Poinciana, Florida, revealing worn underlayment beneath. The image includes a split-screen comparison showing "Before" (damaged, discolored wood and old felt) and "After" (fresh synthetic underlayment). Roofing tools lie nearby under clear blue skies, with the Poinciana Pro Roofers logo and the blog title “How Often Should You Replace Roof Underlayment?” displayed prominently in clean font.

If you're a homeowner in Florida, you probably know that heat, humidity, and storm season take a real toll on roofing materials. But what’s under your shingles matters just as much as what’s on top.

So, how often should you replace roof underlayment? Poinciana Pro Roofers is here to walk you through it.


What Is Roof Underlayment—and Why It Matters


Before we get into timelines, let’s define it. Roof underlayment is the waterproof barrier installed between your roof deck and your shingles. It protects your home from moisture intrusion in case the outer layer gets damaged or wears down.

There are three main types:

  • Felt underlayment (most traditional)

  • Synthetic underlayment (more durable)

  • Rubberized asphalt (for high-moisture protection)

We recommend roof inspections every 1–2 years to evaluate your entire roofing system—including the underlayment.


When Should You Replace Roof Underlayment? Poinciana Pro Roofers Explains


There’s no universal number, but if you're wondering when to replace roof underlayment, Poinciana Pro Roofers generally recommends the following guidelines:

  • Felt underlayment: Replace every 12–20 years

  • Synthetic underlayment: Lasts 25–30 years

  • If part of a roof replacement: Always replace the underlayment then

  • After storm or moisture damage: Replace ASAP

If you notice leaks, stains on your ceiling, or sagging areas in your attic, these may be signs the underlayment has failed—even if your shingles look fine.


How Florida Weather Speeds Up Underlayment Wear


Florida’s humid climate, hurricane season, and UV exposure accelerate deterioration. That’s why we often suggest proactive roof maintenance to catch early signs of wear—before they escalate.


Can You Replace Underlayment Without Replacing the Roof?


Yes, but only in specific cases. If your shingles are still in good shape, our team at Poinciana Pro Roofers can remove sections and replace the underlayment below. However, if the roof is nearing the end of its life, a full replacement may be more cost-effective.

Let’s discuss the options in a free consultation.


Trust Poinciana Pro Roofers to Get It Right

We’ve helped hundreds of Florida homeowners understand and replace their roof underlayment with minimal hassle and maximum transparency. Whether you need emergency help or a long-term roofing plan, we’re here to support you.


Let Poinciana Pro Roofers help you decide when—and how—to replace roof underlayment to keep your home protected from the inside out.

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