Yes, all wood roofs need underlayment. Learn why breathable underlayment is essential for wood roofing in Georgia homes and how it prevents moisture issues.

Do I need underlayment with a wood roof?

Wood Roofing FAQs
October 16, 2025•2 min read

Do I Need Underlayment with a Wood Roof? (Georgia Homeowners Guide)

Yes. Underlayment is required with every wood roof.
It’s not optional. It’s critical.

Here’s why:

  • Moisture Protection
    Wood shakes and shingles aren’t waterproof. Without a moisture barrier underneath, rainwater can seep through and damage your decking or insulation.

  • Breathability Matters
    Wood needs to breathe. A breathable underlayment (like synthetic felt or skip-sheathing) allows air to circulate and helps the wood dry out after rain.

  • Prevents Rot and Mold
    Without airflow, trapped moisture under the wood can lead to wood rot, mildew, and even structural damage.

  • Required by Code
    Both the 2021 International Residential Code (IRC) and leading associations like the Cedar Shake & Shingle Bureau require underlayment beneath wood roofing systems.

  • Extends Roof Life
    Proper underlayment improves ventilation and helps your roof last longer, especially in Georgia’s humid climate.

What type of underlayment is best for wood roofing in Georgia?

  • Skip Sheathing (Open Sheathing)
    Traditional for wood shake roofs. It allows air circulation between the shingles and the roof deck.

  • Breathable Synthetic Underlayment
    Modern synthetic options offer better tear resistance and can handle Georgia’s hot, humid summers.

  • Double-Layer Felt
    Often used under wood shingles, especially in areas with steep slopes or high moisture.

Does RoofNuts install wood roofs with underlayment?

Yes. At RoofNuts, every wood roof we install includes the correct underlayment system based on:

  • Roof pitch

  • Local code

  • Climate zone

  • Wood type (shake or shingle)

We follow standards from the Cedar Shake & Shingle Bureau and Georgia's local building codes to ensure your wood roof is protected from the start.

📞 Call us at 404-476-6851 or request an inspection online to make sure your wood roof is up to code.

More FAQs about Wood Roofs in Georgia

How long does a wood roof last in Georgia?

A properly installed cedar shake roof lasts 25–35 years in Georgia. Routine maintenance and proper ventilation are key.

Are wood roofs legal in Georgia?

Yes, but some municipalities or HOAs may have restrictions. Always check with your local building department.

Can I install wood shingles over existing roofing?

No. Wood roofing must be installed on a ventilated deck. Tear-off of old materials is always required for proper installation.

Do cedar roofs attract insects?

Not if installed and maintained properly. Cedar naturally resists most pests, especially when treated.

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