Learn why synthetic roofing underlayment is replacing felt paper under asphalt shingles. Discover the key benefits for homeowners in Colorado and Georgia, including durability, safety, and code compliance.

Why Synthetic Underlayment Is the Smart Choice for Shingle Roofing in Colorado and Georgia

Shingle Roofing
July 26, 2025•2 min read

What Is Synthetic Roofing Underlayment?

Synthetic underlayment is a high-performance barrier installed between your roof decking and your shingles. It’s typically made from polypropylene or polyethylene and reinforced with fiberglass for strength.

Its job? Protect your home from water, wind-driven rain, and moisture if your shingles are damaged or removed.

Why Roofers Prefer Synthetic Underlayment Over Felt

Compared to traditional asphalt-saturated felt (often called “tar paper”), synthetic underlayment offers key benefits:

  • Stronger and more tear-resistant – Won’t rip under foot traffic during installation.

  • Lighter weight – Easier and safer to handle on steep roofs.

  • Slip-resistant surface – Better grip for roofers, improving jobsite safety.

  • Waterproof, not just water-resistant – Provides better moisture protection, even in wind-driven rain.

  • Longer UV exposure window – Can stay exposed for weeks without degrading if shingles are delayed.

These reasons alone have led many roofing manufacturers and building codes to recommend or require synthetics for residential roofs.

Code Compliance: Synthetic Underlayment Meets the Standards

In both Colorado and Georgia, synthetic underlayments meet or exceed current IRC and IBC building code requirements for residential roofing. In fact, many are approved as Class A fire-rated components when installed with specific shingle systems.

Ideal for Colorado's Hail and Snow

In Colorado, roofing systems need to hold up under freeze-thaw cycles, hail, and high winds. Synthetic underlayment supports that:

  • Stays flexible in cold temps (unlike felt, which can crack)

  • Resists moisture absorption under snow buildup

  • Withstands wind uplift during hailstorms

Built for Georgia's Heat and Humidity

Down south in Georgia, the roof deck can become a sauna in summer. Moisture control is critical. Synthetic underlayment:

  • Won’t wrinkle or absorb humidity like felt

  • Won’t degrade or fuse to shingles under high temps

  • Protects against mold and rot from attic moisture build-up

FAQ: Synthetic Underlayment for Shingle Roofs

Is synthetic underlayment required by code?
Not always, but many local codes and manufacturers now require or strongly recommend it due to safety, durability, and warranty compatibility.

How long can synthetic underlayment be exposed?
Typically up to 90–180 days, depending on the brand. This gives your installer more flexibility during unpredictable weather.

Does it work with all asphalt shingles?
Yes—most major brands approve synthetic underlayments. Just make sure it’s compatible with your specific roofing system.

How much more does it cost than felt?
Synthetic underlayment costs a bit more up front—but saves money long-term by lasting longer, reducing installation time, and improving roof performance.

Bottom Line: It’s Worth the Upgrade

If you’re replacing a roof in Denver, Colorado Springs, Atlanta, or Savannah, synthetic underlayment is the clear winner for shingle roofing. It’s stronger, safer, and better suited to the extreme weather of both regions.

Want a long-lasting roof with maximum protection? Ask Roof Nuts to install your new shingle roof with high-performance synthetic underlayment.

📍 Serving Colorado & Georgia
📞 Colorado: 303-276-2403
📞 Georgia: 404-476-6851
🌐 Learn more at RoofNutsCO.com or RoofNutsGA.com

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