Understanding Roofing Underlayment

Underlayment Explained

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Roofing underlayment is a critical component of any roofing system, providing an extra layer of protection between the roof deck and the shingles.

What Is Underlayment? Underlayment is a water-resistant or waterproof barrier installed directly on the roof deck. It serves as a secondary line of defense against water infiltration.

Types of Underlayment:

Asphalt-Saturated Felt (Tar Paper)

  • Traditional option used for decades
  • Available in 15# and 30# weights
  • Cost-effective but less durable

Synthetic Underlayment

  • Modern, high-performance option
  • Lightweight yet stronger than felt
  • Better UV resistance
  • Longer lifespan

Rubberized Asphalt (Peel-and-Stick)

  • Self-adhering membrane
  • Waterproof, not just water-resistant
  • Best for valleys, eaves, and penetrations
  • Required in ice dam prone areas

Why Underlayment Matters

  • Protects against wind-driven rain
  • Provides backup waterproofing
  • Required by building codes
  • Extends roof life
  • Required by most shingle warranties

At Roofing Tyler TX, we use premium underlayment products to ensure your roof provides maximum protection.

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