The Most Common Types of Roofing Underlayment

October 15, 2024

Your roof is one of the most critical defenses against the elements. Have you considered what lies beneath your shingles? Roof underlayment is vital in protecting your home from moisture damage. Did you know that there are several types of underlayment, each with its own benefits? Let’s explore your roofing underlayment options and how to choose the best one for your needs.


Roof underlayment is a barrier material installed directly on your roof deck. It acts as a secondary layer of protection against water infiltration. This underlayment lies between the roof deck and the outer roofing materials, typically shingles. It ensures that moisture sneaking past the outer layer does not penetrate the roof deck.

Three Roof Underlayment Types

Felt Underlayment

Felt underlayment, often called tar paper, has been used for decades. It’s made from organic materials saturated with asphalt, providing water resistance. It offers varying durability and is available in two standard weights, 15 pounds per hundred square feet (No. 15 felt) and 30 pounds per hundred square feet (No. 30 felt). This type of underlayment is commonly used under asphalt shingles and tile shingles.

Self-Adhered Underlayment

Self-adhered underlayment is a modern option featuring high percentages of asphalt and rubber polymers. Its sticky backing provides a waterproof seal on the roof deck, making it a prominent choice for leak-prone areas like eaves and valleys. Due to its superior water resistance, it’s especially beneficial in regions with severe winters. The upper surface is usually coarse, providing a non-skid surface for installer safety.

Synthetic Underlayment

Synthetic underlayment is a newer, popular option made from multiple layers of polymers woven together. It’s lightweight, durable, and water-resistant, providing excellent walkability and ease of installation. This underlayment generally covers more square feet per roll, reducing labor costs and time. Because of its benefits, synthetic roof underlayment has become a go-to choice for many roofing projects.

Five Roofing Underlayment Options

1. Deck-Armor™

Deck-Armor™ is a breathable, synthetic material with strength reinforcement and excellent water resistance. Designed for performance in extreme temperatures, it’s an excellent choice for those seeking durable construction materials for their roof.

2. Tiger Paw™

Tiger Paw™ synthetic underlayments provide excellent walkability and outstanding strength. This product specializes in optimal protection under harsh weather conditions, ensuring the longevity and durability of the roofing system.

3. FeltBuster®

FeltBuster® is a synthetic roof underlayment that repels water and is inert to mold. It’s lighter than traditional felt and offers a more secure walking surface for roofers during installation, making it a preferred option among professionals.

4. Shingle-Mate®

Shingle-Mate® is a fiberglass-reinforced underlayment designed for steep slope walkability. It protects against wind and moisture damage, making it suitable for roofing projects.

5. VersaShield®

VersaShield® is a fire-resistant underlayment that meets ASTM-compliant standards. It adds an extra layer of protection for roofing systems, ensuring safety and durability for both homeowners and roofing contractors.

Why Is Roofing Underlayment Necessary?

  • Secondary Layer of Protection. If water seeps under your shingles, roof underlayment is a secondary protection layer. It prevents moisture from penetrating the roof deck, ensuring the structural integrity of the entire roof.
  • Protection Against Water Damage. This underlayment material provides a waterproof barrier that safeguards against water and moisture damage. It’s crucial to prevent long-term issues like rot and mold that can compromise the structure of your home.
  • Durable Construction. Using a durable underlayment extends the life of your roof. Materials like synthetic roofing underlayments offer tear and water resistance, making them long-lasting and durable under various weather conditions.
  • Leak Barrier. For areas prone to leaks, self-adhered underlayment acts as a tight seal. This is essential in regions that experience bad weather, ensuring additional layers of waterproofing protection.
  • Performance in Extreme Temperatures. Underlayments like Deck-Armor™ and Tiger Paw™ provide excellent performance in extreme temperatures. Their durability ensures consistent protection against bad weather and cold weather snaps.

How to Choose a Roof Underlayment

Step 1: Assess Your Local Weather Conditions

Before selecting an underlayment, consider the local climate. Areas with heavy rainfall or snow will benefit from self-adhered underlayment for superior water resistance.

Step 2: Consider Roof Pitch

The steepness of your roof will influence the choice of underlayment. Steeper roofs often require more robust and tear-resistant materials, such as synthetic underlayments, for strong protection.

Step 3: Check Building Codes

Ensure that the type of underlayment used complies with local building codes. This ensures the installation meets all regulatory requirements, ensuring safety and effectiveness.

Step 4: Evaluate Material Options

Compare different underlayment materials based on your budget and needs. While felt underlayment is cost-effective, synthetic options may offer better long-term performance and durability.

Step 5: Consult With Roofing Professionals

Talk to experienced roofing contractors. They can provide recommendations based on their expertise and your specific project requirements. Accurate application is essential for optimal protection.

Seeking Professional Roofing Services? Contact Stonecreek Roofing Today

Roof underlayment is vital in ensuring the longevity and effectiveness of your roof. By understanding and selecting the correct type of underlayment, you can provide your roof with the best line of defense against the elements.

Stonecreek Roofing offers a wide range of services to meet your roofing needs. Our experienced team is equipped to handle all roofing projects, from roof repair to replacement. Whether you need expert advice or a complete roof replacement, we are here to help.

Contact us today for a free roofing estimate, and let us take care of all your roofing needs.

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