When you picture a roof, you probably think of shingles or metal panels. But there’s an essential layer most homeowners never see: the underlayment. As a trusted roofing contractor in Virginia Beach, WT Anderson emphasizes the importance of this hidden barrier in safeguarding your home from moisture, wind, and heat.

What Is Roof Underlayment?

Underlayment is a water-resistant or waterproof material installed directly on your roof deck, underneath the shingles. It provides a second layer of protection against water intrusion, especially in extreme weather.

There are three main types:

• Asphalt-saturated felt: Traditional, cost-effective
• Synthetic underlayment: Durable, lightweight, and tear-resistant
• Rubberized asphalt: Premium waterproofing for vulnerable areas

Why Underlayment Matters for Roof Longevity

1. Acts as a Moisture Barrier

If shingles blow off or become damaged, the underlayment protects the decking from water damage.

2. Improves Fire Resistance

Some underlayments are rated to increase your roof’s fire protection.

3. Adds Stability During Installation

It helps keep shingles aligned and smooth, ensuring a clean and effective finish.

4. Enhances Wind and Storm Protection

High-performance synthetic underlayments can offer superior resistance to wind-driven rain—vital in storm-prone areas like Virginia Beach.

Choosing the Right Underlayment

A professional roofing contractor in Virginia Beach will recommend the best type based on:

• Local weather conditions
• Roofing material
• Slope of your roof

Learn more about our roof replacement services.

Sources:

• GAF Roofing: Underlayment Types
• WT Anderson Roof Replacement

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