What Is Synthetic Underlayment: Benefits, Installation, and Comparison
What Is Synthetic Underlayment?
Synthetic underlayment is a layer of protection placed between the roof deck and shingles.
Its main purpose is to prevent moisture damage by acting as a secondary moisture barrier and preventing wind-driven rain infiltration.
Synthetic underlayment can be made from either asphalt-saturated felt or modern synthetic materials.
Different types of synthetic underlayment are available, each offering specific features such as breathability, UV stabilization, tear resistance, and fire resistance.
The thickness and manufacturing process can be adjusted to provide different properties, and the rating is measured in grams-per-square-meter (GSM).
The price of synthetic underlayment varies based on weight and performance, with heavier products offering better walkability and durability.
Thicker products typically cost 30%-40% more than high-quality felt.
Key Points:
- Synthetic underlayment acts as a secondary moisture barrier and prevents wind-driven rain infiltration.
- It can be made from asphalt-saturated felt or modern synthetic materials.
- There are different types of synthetic underlayment with specific features such as breathability, UV stabilization, tear resistance, and fire resistance.
- The thickness and manufacturing process can be adjusted to provide different properties, measured in grams-per-square-meter (GSM) rating.
- The price varies based on weight and performance, with heavier products offering better walkability and durability.
- Thicker synthetic underlayment typically costs 30%-40% more than high-quality felt.
Did You Know?
1. Synthetic underlayment is a durable roofing material commonly used as a moisture barrier and protective layer beneath the final roof covering. Unlike traditional felt underlayment, it is constructed from synthetic materials such as polypropylene and polyester.
2. The thickness of synthetic underlayment can vary significantly depending on the brand and type, with some options as thin as 15 mils and others as thick as 60 mils. Thicker underlayment generally offers enhanced protection against weather elements and potential damage during installation.
3. Synthetic underlayment is known for its excellent tear resistance, making it highly resilient during the roof installation process. This durability helps to prevent accidental rips or tears that could compromise the overall integrity of the roofing system.
4. Due to its synthetic composition, underlayment made from polypropylene and polyester is resistant to mold and deterioration caused by moisture. This feature is particularly advantageous in areas with high humidity or prone to heavy rainfall.
5. Some synthetic underlayment brands employ advanced technologies to enhance their performance, such as UV stabilizers that resist degradation from prolonged sun exposure. These additives help prolong the lifespan of the underlayment and maintain its effectiveness in protecting the roof.
Introduction To Synthetic Underlayment
Synthetic underlayment is a vital component of a roofing system that is placed between the roof deck and shingles. It acts as a protective layer, helping to guard against moisture damage. It is made from either asphalt-saturated felt or modern synthetic materials.
One of its primary functions is to act as a secondary moisture barrier, preventing any infiltration of wind-driven rain and moisture. This layer plays a crucial role in maintaining the structural integrity of the roof and ensuring its longevity.
Benefits And Functions Of Synthetic Underlayment
The benefits of synthetic underlayment are diverse and significant. Firstly, it provides an added layer of protection against moisture, ensuring that water does not seep into the roof deck or the interior of the building. This protection is particularly important in areas prone to heavy rain or high humidity.
Secondly, synthetic underlayment acts as a barrier against wind-driven rain. It effectively prevents rainwater from infiltrating the roof system and causing damage to the structure and interiors. This safeguard is crucial for maintaining the overall integrity of the roof and preventing potential issues such as leaks and mold growth.
Moreover, synthetic underlayment offers excellent durability and can withstand harsh weather conditions. It is designed to resist tearing and is often reinforced with materials such as fiberglass to enhance its strength. The added durability ensures that the underlayment can effectively protect the roof deck and shingles for an extended period.
Furthermore, synthetic underlayment is available in various types, allowing homeowners to choose the one that best suits their specific needs. Whether it’s Deck-Armor, Tiger Paw, FeltBuster, Shingle-Mate, or VersaShield, there is an option for every preference and requirement.
Types And Features Of Synthetic Underlayment
Different types of synthetic underlayment offer unique features that cater to different roof requirements. For example, Deck-Armor is a breathable and slip-resistant underlayment that allows for ventilation while also providing grip for safe installation. Tiger Paw, on the other hand, is UV-stabilized and offers exceptional protection against the sun’s harmful rays, ensuring that the underlayment remains effective for an extended period.
FeltBuster is a value-priced synthetic underlayment that offers tear resistance and moisture resistance. It provides reliable protection without breaking the bank. Shingle-Mate, another popular option, is fiberglass-reinforced, offering enhanced resistance against rain and durability. Lastly, VersaShield stands out for its fire-resistant properties and its reinforced fiberglass structure, providing maximum protection in case of fire.
Factors Affecting Price And Performance Of Synthetic Underlayment
Price and performance in synthetic underlayment are influenced by several factors. One of the key factors is the material used in its manufacturing process, which commonly includes polyethylene or polypropylene. The specific properties of the product can be altered by variations in the manufacturing process and thickness.
The performance of synthetic underlayment is measured in grams per square meter (GSM). Heavier products generally offer better walkability, increased durability, and longer exposure times, making them suitable for areas with extreme weather conditions. Meanwhile, thinner products still provide adequate protection and may even be comparable in price to high-quality felt underlayment.
It is worth considering that thickness also influences the price. Thicker synthetic underlayment products usually cost 30%-40% more than their thinner counterparts. However, the added expense might be justified by the enhanced durability and extended lifespan they offer.
- Thicker synthetic underlayment is generally more expensive
- Heavier products have better walkability, increased durability, and longer exposure times
- Thinner products can be comparable in price to high-quality felt underlayment.
Synthetic Underlayment Brands: Gaf And Certainteed
When it comes to synthetic underlayment, two reputable brands stand out: GAF and CertainTeed. GAF roof deck protection products, such as Deck-Armor, provide excellent moisture resistance and qualify for a lifetime limited warranty. GAF-certified contractors can provide valuable information and guidance on the installation and maintenance of synthetic underlayment.
On the other hand, CertainTeed offers RoofRunner and DiamondDeck as their synthetic underlayment options. RoofRunner, with 110 GSM, and DiamondDeck, with 185 GSM, deliver reliable protection and durability for various roofing applications. Both brands have a strong reputation in the industry and are trusted by homeowners and contractors alike.
In conclusion, synthetic underlayment plays a critical role in protecting the roof deck and shingles from moisture damage, wind-driven rain, and other external elements.
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Frequently Asked Questions
What is synthetic underlayment made of?
Synthetic underlayment is composed of woven or spun polyethylene or polypropylene fibers. These materials are carefully chosen for their durability and ability to withstand varying weather conditions. This type of underlayment is designed to be lightweight, providing ease of installation and transport. Furthermore, it often features a layered design, offering added protection and flexibility to suit different roofing needs.
Is synthetic underlayment good?
Synthetic underlayment offers a variety of advantages. It acts as a reliable shield against water intrusion, especially when comparing it to peel and stick underlayments. Its durability is commendable as it avoids issues like rotting, buckling, or cracking, ensuring a long-lasting sound barrier for your roofing needs.
Why is synthetic underlayment better?
Synthetic underlayment is a superior choice due to its water-resistant properties. It effectively prevents water from easily entering your home, offering a reliable solution when roofing shingles are compromised during wind storms. With its excellent moisture barrier, it efficiently keeps rainwater out until our team arrives, giving you peace of mind and minimizing potential damage to your home.
What are 2 differences between synthetic underlayment and felt?
One key difference between synthetic underlayment and felt is their durability. Unlike felt underlayment, synthetic underlayment is less likely to rip, even in high winds or during installation. Another notable difference is their water resistance properties. While felt underlayment tends to absorb water, synthetic underlayment repels it, offering better protection against moisture damage. Additionally, synthetic underlayment is known to hold nails more securely compared to felt.
