What Is Roof Underlayment: The Essential Protective Layer?

What Is Roof Underlayment?

Roof underlayment is a crucial part of a roofing system.

It serves as a secondary protection against moisture and is typically made of asphalt-saturated felt or synthetic materials.

Different types of roof underlayment are available, such as Deck-Armor™, Tiger Paw™, FeltBuster®, Shingle-Mate®, and VersaShield®.

These options offer various benefits, including breathability, UV stabilization, tear resistance, and fire resistance.

GAF provides certified contractors for installation and offers a Lifetime limited warranty when its roof deck protection is installed with qualifying products.

Key Points:

  • Roof underlayment is essential for a roofing system, providing secondary protection against moisture.
  • It is typically made of asphalt-saturated felt or synthetic materials.
  • Different types of roof underlayment include Deck-Armor™, Tiger Paw™, FeltBuster®, Shingle-Mate®, and VersaShield®.
  • These options offer benefits such as breathability, UV stabilization, tear resistance, and fire resistance.
  • GAF provides certified contractors for installation and offers a Lifetime limited warranty when its roof deck protection is installed with qualifying products.

Did You Know?

1. Roof underlayment was first used in ancient Egypt to protect the roofs of temples and palaces from leaking during heavy rainstorms.

2. The earliest forms of roof underlayment were made from naturally occurring materials such as animal hide or woven reeds.

3. In the early 20th century, the most popular type of roof underlayment was made from a combination of asphalt and felt, known as tar paper.

4. Modern roof underlayment typically consists of synthetic materials like polypropylene or polyester, engineered to resist water infiltration and provide additional thermal insulation.

5. An often overlooked benefit of roof underlayment is its ability to reduce noise from rain or hail, creating a quieter and more peaceful indoor environment.

Importance Of Roof Underlayment In A Roofing System

Roof underlayment plays a vital role in a roofing system, providing secondary protection against moisture infiltration. While roofing shingles are the first line of defense against the elements, they are not entirely impervious to water. Underlayment provides an additional layer of protection, acting as a barrier against wind-driven rain and trapped moisture. This extra layer can prevent leaks and water damage, ensuring the longevity and durability of a roof.

In addition to moisture protection, underlayment can also improve the energy efficiency of a building. Certain types of underlayment, such as GAF Deck-Armor™, are designed to be breathable. This allows them to release trapped moisture and heat from the attic, helping to prevent the accumulation of mold, mildew, and rot. By maintaining proper ventilation, underlayment can contribute to a healthier indoor environment and potentially reduce energy costs.

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Types Of Roof Underlayment Materials

Roof underlayment plays a crucial role in protecting against moisture during the roofing process. There are two main types of underlayment: asphalt-saturated felt and synthetic materials.

Asphalt-saturated felt, also known as roofing felt or tar paper, has a long history of effectiveness. It is made by saturating a base material, such as cellulose or fiberglass, with asphalt. This process creates a water-resistant barrier that safeguards the roof structure from potential water damage.

On the other hand, synthetic underlayment is a newer innovation in the roofing industry. It is made from lightweight and tear-resistant synthetic polymers like polypropylene or polyethylene. Synthetic underlayment boasts increased durability and longevity. Furthermore, it often includes advanced technologies like UV stabilization, which enhances its overall performance and extends its lifespan.

In summary:

  • Asphalt-saturated felt, or roofing felt, has been traditionally used and is proven to effectively protect against moisture.
  • Synthetic underlayment is a newer option that offers lightweight and tear-resistant features.
  • Synthetic underlayment often incorporates advanced technologies, such as UV stabilization, for enhanced performance and durability.

GAF’s Breathable And Protective Deck-Armor™ Underlayment

Among the various types of roof underlayment available, GAF Deck-Armor™ stands out for its breathability and superior protection against wind-driven rain and trapped moisture. This underlayment is designed to allow the attic to breathe, releasing excess heat and moisture and helping to maintain a healthy environment in the roof space.

Deck-Armor™ is constructed with a durable synthetic material that is water-resistant and can withstand harsh weather conditions. It provides an excellent secondary layer of defense against leaks and water damage, ensuring the longevity of the roofing system. Additionally, this underlayment has a textured surface that improves foot traction during installation, enhancing safety for contractors.

  • Breathable design: Allows the attic to release excess heat and moisture for a healthy roof space.
  • Superior protection: Guards against wind-driven rain and trapped moisture to prevent damage.
  • Durable and water-resistant: Made with a synthetic material that withstands harsh weather conditions.
  • Secondary layer of defense: Provides an extra shield against leaks and water damage.
  • Textured surface: Improves foot traction during installation, enhancing safety for contractors.

“GAF Deck-Armor™ is a top choice for roof underlayment due to its breathability, superior protection, and durability.”

Tiger Paw™: Synthetic Underlayment For Moisture Reduction And Strong Protection

GAF’s Tiger Paw™ synthetic underlayment is a premium option for moisture reduction and strong protection against the elements. This underlayment is specifically engineered to reduce the occurrence of moisture-related issues, such as mold and rot, by allowing for proper ventilation and moisture release. The UV stabilization technology incorporated into Tiger Paw™ ensures that it maintains its integrity and performance over time.

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Tiger Paw™ is a tear-resistant underlayment that can withstand the rigors of installation and job site traffic. Its high-strength synthetic construction provides a robust barrier against wind-driven rain and other potentially damaging elements. With Tiger Paw™, homeowners can have peace of mind knowing that their roof is well protected.

GAF’s Range Of Underlayment Options For Various Roofing Needs

In addition to Deck-Armor™ and Tiger Paw™, GAF offers a range of underlayment options to cater to different roofing needs. For those looking for value-priced underlayment that resists tearing and does not absorb moisture, GAF’s FeltBuster® is an ideal choice. This polypropylene underlayment provides reliable protection at an affordable price point.

For enhanced protection against wind-driven rain, GAF’s Shingle-Mate® fiberglass-reinforced underlayment is a top choice. Acting as a secondary layer of defense, Shingle-Mate® offers increased strength and peace of mind in areas prone to severe weather conditions.

For fire-resistant roof deck protection, GAF’s VersaShield® is the way to go. This product helps attain a high UL fire rating while also offering protection against wind-driven rain.

With a wide range of underlayment options available, GAF ensures that homeowners can find the perfect solution for their specific roofing needs.

In conclusion, roof underlayment is an essential protective layer in a roofing system. It provides secondary protection against moisture infiltration and helps maintain a healthy environment in the attic. GAF offers a variety of underlayment options, from breathable and protective Deck-Armor™ to tear-resistant Tiger Paw™, to meet different roofing needs. With GAF-certified contractors and a lifetime limited warranty, homeowners can trust in the quality and durability of GAF roof underlayment products.

  • FeltBuster®: value-priced underlayment, tear-resistant, moisture-resistant
  • Shingle-Mate®: enhanced protection against wind-driven rain, fiberglass-reinforced, for severe weather conditions
  • VersaShield®: fire-resistant roof deck protection, high UL fire rating, wind-driven rain protection

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Frequently Asked Questions

What material is used for roof underlayment?

Roof underlayment provides an essential layer of protection between the roof deck and the roofing materials. The three primary types of underlayment are asphalt-saturated felt, rubberized asphalt, and non-bitumen synthetic. Asphalt-saturated felt is a commonly used material that consists of an organic or fiberglass base, soaked with asphalt. Rubberized asphalt underlayment offers enhanced durability and flexibility, as it includes a layer of asphalt mixed with synthetic rubber. Lastly, non-bitumen synthetic underlayment is made from polypropylene or polyester materials, providing excellent resistance to moisture and UV degradation. Each type of underlayment has its own unique characteristics, allowing homeowners and professionals to choose the best option based on their specific needs and preferences.

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Is roofing underlayment necessary?

Roofing underlayment is an essential component for maintaining a solid and durable roof structure. Its significance lies in its ability to protect the roof deck from potential damage caused by rain and adverse weather conditions. By acting as a waterproof barrier, underlayment prevents moisture intrusion, which, if left unchecked, can lead to severe issues such as rot, mildew, and mold formation. Thus, incorporating roofing underlayment into the construction process is indispensable to ensure the longevity and structural integrity of a roof.

What are examples of roof underlayment?

When it comes to roofing underlayment, there are several options to consider. One example is felt underlayment, which is a traditional choice. Made from a mixture of asphalt and organic or synthetic fibers, felt underlayment provides a protective barrier between the roof deck and the shingles. Another example is self-adhered underlayment, which is gaining popularity due to its ease of installation. This type of underlayment has a sticky backing that adheres directly to the roof deck, providing a watertight seal. Lastly, synthetic underlayment is a more modern option that offers excellent durability and weather resistance. Made from synthetic materials such as polypropylene or polyester, this type of underlayment is lightweight, easy to install, and provides superior protection against moisture and UV rays.

Why is roof underlayment important?

Roof underlayment plays a crucial role in protecting your roof from the elements. Whether it’s rain, snow, or hail, the underlayment acts as a water-resistant barrier, preventing any moisture from seeping into the roof deck and causing damage. By providing an additional layer of defense, underlayment helps to prolong the lifespan of the roof and ensure its structural integrity.

Another significant aspect of roof underlayment is its ability to enhance the energy efficiency of your home. It serves as an extra insulation layer, helping to regulate the temperature inside your house by reducing heat loss or gain through the roof. This can result in reduced energy consumption and lower heating or cooling costs, making underlayment a valuable component in maintaining a comfortable and environmentally-friendly living space.

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