Roofing Glossary — (470) 422-7898 · Kennesaw Pro Roofing

Underlayment

Underlayment
A water-resistant barrier installed directly on the roof deck beneath the shingles. Georgia building code requires synthetic underlayment for new roof installations. Underlayment provides a secondary layer of protection against water infiltration if shingles are damaged or blown off.

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Common Questions

What is underlayment in roofing?

A water-resistant barrier installed directly on the roof deck beneath the shingles. Georgia building code requires synthetic underlayment for new roof installations. Underlayment provides a secondary layer of protection against water infiltration if shingles are damaged or blown off.

Why is underlayment important for my Georgia roof?

Understanding roofing terminology helps Cobb County homeowners make informed decisions about repairs and replacements. Kennesaw Pro Roofing explains every concept in plain language during our free inspections.

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Reviewed by the Kennesaw Pro Roofing editorial team · Georgia Licensed Roofing Contractor #ROC-1145321 · Last updated 2026-09-13. Information here is general guidance; roof condition and cost depend on the property, so send photos for a specific answer.

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