Introduction
When it comes to safeguarding your roof from water infiltration and harsh weather conditions, nothing is more essential than a reliable Roofing Felt Paper. Acting as a secondary protective layer between the roof deck and the external roofing material, it plays a crucial role in extending the life of your entire roofing system.
This paper-like material, also referred to as felt roofing paper or roof felt paper, serves as a barrier against moisture, preventing leaks that could otherwise cause serious damage to the structure beneath. Whether you’re involved in a new construction project or replacing old shingles, investing in high-quality felt paper for roofing is a decision that pays off in durability and peace of mind.
In this article, we’ll explore the 7 best roofing felt paper options available today, how they compare, their benefits, and a comprehensive buying guide to help you make the right decision. We will also explain the differences between roofing felt vs tar paper, how to install these materials effectively, and which ones are best for various climate zones in the USA.
What is Roofing Felt Paper?
Roofing felt paper is a protective layer that sits between the roof deck and the outer roofing material, such as shingles or tiles. Often referred to as felt paper for roofing or roof felt paper, this underlayment plays a critical role in protecting the structural integrity of a roof.
It is typically made from a base of organic materials or fiberglass that is saturated with asphalt. This composition allows the material to resist water, absorb impact, and handle temperature shifts. In the construction industry, it’s also known as roofing felt tar paper, especially when talking about older asphalt-based versions.
The main purpose of felt roofing paper is to create a moisture barrier. If rain or snow manages to get beneath the shingles, the felt paper on roof acts as a second line of defense, preventing water from soaking into the wooden roof deck. This helps reduce the chance of mold, mildew, or wood rot developing over time.
Types of Roofing Felt Paper
There are two common types available:
Asphalt-Saturated Felt
This is the traditional variety, still widely used in residential projects. It is available in two standard weights: 15-pound and 30-pound. The 30-pound version is thicker and offers better resistance against wind and water.
Synthetic Roofing Felt
Modern roofers are increasingly turning to synthetic felt paper roofing because it’s lightweight, durable, and highly resistant to tearing. It’s especially useful for large roofing projects or homes in regions with high winds and heavy rainfall.
No matter the type, installing felt paper roof ensures that your roofing system has a solid, dependable foundation. It works well in both hot and cold climates and is compatible with a wide range of roof types — including felt paper under metal roof systems.
Benefits of Using Roofing Felt Paper
Using roofing felt paper beneath your roof shingles or tiles is more than just a construction standard — it’s a smart, long-term investment in the durability of your home. Whether you’re working with asphalt shingles or metal panels, this underlayment serves as a hidden shield, defending your roof from the elements.
Moisture Protection
Perhaps the most important advantage is its ability to act as a moisture barrier. In cases where wind-driven rain or ice dams penetrate the top layer of roofing, the felt paper on roof prevents water from reaching the decking. This extra layer significantly reduces the risk of rot, warping, and interior leaks.
Enhanced Durability and Insulation
By incorporating felt paper for roof, you add an extra layer of protection that supports thermal regulation and helps reduce sound transmission. This is especially important in areas that experience both high heat and cold temperatures.
Roof Longevity
Using felt roofing paper can extend the lifespan of your roofing system by preventing premature damage caused by UV rays, water, and debris. Even in regions with volatile weather, it acts as a buffer that preserves the integrity of the shingles above.
Compatibility with Multiple Roofing Types
Whether you’re installing a new roof or replacing an old one, roof felt paper is compatible with various materials. From shingles to felt paper under metal roof, it functions effectively across multiple applications.
Affordable and Accessible
Compared to other protective materials, roofing felt tar paper remains affordable and easy to install. It’s widely available in home improvement stores and online — including brands you’ll find at places like Home Depot.
Key Features to Look for Before Buying Roofing Felt Paper
Choosing the right roofing felt paper is essential for long-term performance and protection. Not all felt products are created equal — and the best choice often depends on your roofing type, climate conditions, and installation method. Below are the key features to consider before making your purchase.
Material Composition
The first thing to evaluate is whether you need asphalt-saturated felt or synthetic felt paper for roofing. Asphalt felt is heavier and more traditional, while synthetic felt is lighter, more tear-resistant, and easier to install. If you’re installing a felt paper under metal roof, synthetic options often work better due to their improved heat resistance.
Weight and Thickness
Roof felt paper typically comes in 15 lb. or 30 lb. weights. The 30 lb. felt roofing paper is thicker and more durable, providing better protection against moisture and physical damage. This makes it ideal for homes in storm-prone areas or regions with heavy snowfall.
Water Resistance
The primary job of felt paper for roof is to act as a moisture barrier. Be sure the product you choose offers solid waterproofing capabilities. For areas with high humidity or rainfall, higher-grade felt or enhanced roofing felt tar paper with added asphalt coating is recommended.
UV Protection
If there’s a delay between laying down the felt paper on roof and installing shingles, the underlayment will be exposed to sunlight. That’s why UV resistance is critical — especially for synthetic felt roofing paper, which can typically withstand UV exposure longer than asphalt-based versions.
Fire Rating
Some building codes require your underlayment to meet specific fire-resistance standards. Always check the fire classification of your chosen product before purchase.
Installation Ease
Choose a product that is easy to cut, roll out, and fasten. Many felt roof paper products include printed guidelines on the surface to help with accurate alignment. If you’re planning a DIY project, this feature is a game-changer.
Compatibility
Ensure your chosen felt is compatible with your primary roofing material. For example, if you’re working on a metal roof, using felt paper under metal roof designed for high-heat environments is critical to prevent deterioration.
Top 7 Roofing Felt Paper Products of 2025
Whether you’re replacing a worn-out roof or building a new one, choosing the right roof felt paper is a crucial step. Below are seven high-performing options that offer reliability, durability, and protection against the elements.
1. ROBERTS Black Jack Underlayment – 100 sq. ft. Roll
The ROBERTS Black Jack Underlayment is a great option for homeowners looking for noise reduction and strong insulation. Although primarily designed for flooring, its durable build and moisture resistance make it a great backup option for felt paper for roofing projects where layered soundproofing is beneficial.
Key Features:
- 2.5 mm thickness for added cushioning
- Easy-to-handle roll (43″ x 28′)
- Superior moisture barrier
- Works well for DIY applications
Why it stands out:
This product adds extra comfort underfoot while also contributing to temperature and sound insulation — qualities often sought in felt paper roof products used in attic-level construction or over porch ceilings.
2. DuPont Roof Protector Roofing Underlayment Roll – 42″ x 286′
DuPont is a trusted name in the construction industry, and this roofing felt paper alternative delivers both strength and convenience. It offers excellent water resistance, is easy to install, and designed to pair with shingles and tiles alike.
Key Features:
- Superior durability with tear resistance
- Covers a large surface area (286 feet)
- Enhanced UV and weather protection
- Compatible with various roof types
Why it stands out:
Ideal for homes in storm-heavy regions, this underlayment provides dependable felt paper for roof performance and long-lasting defense against the elements.
3. ST GOBAIN ADFORS Roof Fabric – 6 ft. x 150 ft.
If you’re looking for added toughness, this roofing felt tar paper substitute offers great coverage and ruggedness. It performs well under shingles and can serve as a base for heavy-duty roofing applications.
Key Features:
- High tensile strength
- Excellent performance in extreme weather
- Easy to install and adjust to roof slopes
- Lightweight yet durable material
Why it stands out:
It’s a great choice for property owners looking to reinforce aging roofs or fortify new ones with felt roofing paper quality in a synthetic format.
4. Tyvek Protec 120 Roof Underlayment – 4′ x 250′
For premium performance and extended roof life, the Tyvek Protec 120 underlayment delivers top-notch waterproofing and UV defense. Perfect for both asphalt and metal roof installations.
Key Features:
- Advanced moisture barrier technology
- Lightweight and tear-resistant
- UV-resistant surface for prolonged exposure
- Smooth walking surface for installers
Why it stands out:
It’s a reliable option for anyone needing a felt paper under metal roof with additional safety and energy efficiency benefits.
5. One Sight Waterproofing Membrane Fabric – 6″ x 75′ Roll
While designed for bathrooms and tiles, the One Sight Waterproofing Membrane Fabric can be a practical companion to felt paper for roofing in tight or high-moisture areas, such as around skylights or roof valleys.
Key Features:
- Non-woven fiberglass mesh
- Reinforces moisture-vulnerable areas
- Excellent anti-crack performance
- Flexible and cuttable for tricky corners
Why it stands out:
If you’re dealing with complex structures, this product complements traditional roofing felt paper by adding a precision waterproof seal in places where leaks typically form.
6. ZIP System Huber Flashing Tape – 3.75″ x 30′
Although not a full roof felt paper, this flashing tape is a necessary addition to protect roof edges, valleys, and penetrations. It creates an air-tight and water-tight seal around windows, vents, and seams.
Key Features:
- Self-adhesive for easy use
- Strong seal around openings
- Works alongside felt paper roofing systems
- High-performance in extreme weather
Why it stands out:
It’s ideal for securing the vulnerable edges of your felt paper roof and giving your entire underlayment system greater integrity.
7. ROBERTS Super Felt Underlayment – 100 sq. ft. Roll (3 mm)
The ROBERTS Super Felt Underlayment is a premium option with more thickness (3 mm) than most standard rolls. While often used beneath flooring, its durability and moisture resistance offer many of the benefits associated with roof felt paper.
Key Features:
- Excellent sound dampening
- 3 mm thick high-density felt
- Strong moisture barrier capability
- Simple to roll, cut, and install
Why it stands out:
Great for DIY roof reinforcement or extra insulation beneath felt paper on roof layers. Homeowners who value comfort and quiet will appreciate its added soundproofing.
Roofing Felt Paper vs Synthetic Underlayment
When choosing a roof underlayment, homeowners often ask: should I go with roofing felt paper or invest in a synthetic underlayment? Both options serve the same core purpose — protecting the roof deck from moisture and damage — but they differ significantly in material, performance, and longevity.
Material Composition
Roofing felt paper, also known as felt roofing paper, is traditionally made of organic or fiberglass mat saturated with asphalt. This time-tested material has been used for decades in residential construction and is still preferred for its affordability and simplicity.
Synthetic underlayment, on the other hand, is composed of polypropylene or polyethylene fabrics. It is lightweight, more flexible, and tear-resistant — making it easier to handle and install, especially in large-scale or steep-slope applications.
Durability and Longevity
While standard felt paper for roofing can degrade more quickly under prolonged UV exposure, synthetic felt roofing paper tends to last much longer when exposed to the elements. This makes synthetics a better choice when there’s likely to be a delay between underlayment installation and shingle placement.
Moisture and UV Resistance
If you’re prioritizing moisture barrier performance and plan to install shingles the same day, roof felt paper can be sufficient. But for better resistance to wind-driven rain and extended sunlight exposure, synthetic felt paper roofing outperforms the traditional alternative.
Weight and Installation
Traditional roofing felt tar paper is heavier and may tear under tension, especially during high winds or mishandling. Synthetic options are lighter, easier to roll, and more resilient — making them the go-to solution for professionals working on complex roofs or larger homes.
Cost Comparison
While roofing felt paper is more budget-friendly up front, synthetic underlayments offer better value in the long term due to their increased lifespan and performance. Choosing between the two often comes down to your budget, project scope, and climate zone.
Installation Tips for Roofing Felt Paper
Proper installation of roofing felt paper is crucial to ensuring your roof is protected from leaks, mold, and weather damage. Whether you’re a DIY enthusiast or hiring a contractor, following the correct steps can make a big difference in the performance and longevity of your roofing system.
Prepare the Roof Surface
Before laying down any underlayment, clean the roof deck thoroughly. Remove all debris, nails, dust, and moisture. A smooth, dry surface ensures your felt paper for roofing will adhere properly and lay flat.
Choose the Right Type and Weight
If you’re working on a standard residential roof, 15 lb. roofing felt tar paper might be sufficient. For areas prone to storms or where extra protection is desired, go with 30 lb. felt roof paper or consider synthetic alternatives for enhanced durability and weather resistance.
Install from Bottom to Top
Start at the bottom edge of the roof and work your way upward. Each horizontal layer of roofing felt paper should overlap the one below it by at least 2 inches. This overlapping technique ensures water sheds properly and doesn’t seep into seams.
Secure with Cap Nails or Staples
Use galvanized roofing nails or staples with plastic caps to fasten the felt paper roof securely in place. Place fasteners every 6 to 8 inches along the edges and at least once every 12 inches in the center area. This prevents wrinkling or tearing during windy conditions.
Watch the Weather
Never install felt paper on roof during rain, snow, or high humidity. Moisture trapped under the felt can cause bubbling or rot in the wood below. Always check the weather forecast and plan for at least a full dry day for installation.
Cut Around Vents and Openings
Use a utility knife to cut around chimneys, skylights, and plumbing vents. For extra protection in these areas, reinforce with flashing or waterproof tape like the ZIP System Huber Flashing Tape, which complements your roof felt paper and ensures water-tightness at penetrations.
Overlap Ridges and Valleys
At roof ridges, allow the felt to run across the peak and overlap the other side by at least 6 inches. In valleys, start from the center and apply a double layer of felt paper for roof to prevent water buildup in these high-risk zones.
Roofing Felt Paper Maintenance & Lifespan
Just like any essential building material, roofing felt paper has a finite lifespan. However, with the right installation and regular maintenance, it can protect your roof for many years. Understanding how long it lasts and how to care for it will help you get the most out of your investment.
How Long Does Roofing Felt Paper Last?
On average, standard felt roofing paper lasts about 10 to 15 years under shingles or tiles. However, in optimal conditions — with proper ventilation and weather protection — it can last longer. Synthetic felt paper roofing products often come with warranties of 20 to 30 years, depending on the manufacturer.
If the roof felt paper is exposed to the elements without a top layer of shingles, its life expectancy decreases dramatically. Direct UV exposure, rain, and wind can wear it down within weeks, which is why prompt installation of the primary roof covering is critical.
Signs of Wear or Failure
Here are common indicators that your felt paper for roofing may need replacement:
- Bubbling or wrinkling on the surface
- Tearing or visible cracks
- Moisture stains or soft spots on the decking
- Leaks or mildew inside the attic
Even if your roof looks fine from the outside, felt paper on roof may degrade beneath shingles over time — especially if the roofing system lacks ventilation or suffers from water retention.
Tips to Extend Its Lifespan
- Proper ventilation: Ensures that heat and moisture don’t accumulate under the roof, which can damage the underlayment.
- Regular inspections: Especially after storms, inspect for damage to the shingles or any exposed roofing felt tar paper.
- Timely repairs: Patch damaged shingles or flashing to prevent moisture from reaching the underlayment.
- Quality installation: Choose high-quality materials and ensure that felt paper under metal roof or tile systems are installed correctly.
When to Replace It
If you’re undertaking a re-roofing project and your current felt paper roof is more than 10 years old, it’s advisable to replace it. Even if it looks intact, small tears or degraded spots can compromise your roof’s water resistance.
Buying Guide on Roofing Felt Paper
Choosing the right roofing felt paper is more than just picking a roll off the shelf — it’s about matching your home’s structure, climate, and roofing type with the most reliable product. Below is a step-by-step guide to help you make an informed decision.
Determine Your Roofing Needs
Before you shop, consider:
- The slope of your roof
- The roofing material you’re using (shingle, tile, or metal)
- Local climate conditions, including humidity, wind, and rainfall
If you’re installing felt paper under metal roof, for example, you’ll need a higher heat-resistant and non-slip underlayment.
Choose the Right Material Type
You generally have two primary options:
- Asphalt-saturated roofing felt tar paper
- Synthetic felt paper roofing
If budget is tight and you’re covering the roof quickly, asphalt felt may be suitable. But for longer protection, lightweight handling, and UV resistance, synthetic underlayment is the better choice.
Evaluate Weight and Thickness
Traditional roof felt paper is available in 15 lb. and 30 lb. weights:
- 15 lb. felt is lighter and easier to install but offers less durability
- 30 lb. felt is thicker, more robust, and better for storm-prone areas
Thicker materials offer stronger resistance to tearing and moisture, making them ideal for complex roof structures or high-impact zones.
Look for Water and UV Resistance
In wetter climates, prioritize felt paper for roofing that provides a strong moisture barrier. Some advanced synthetic products offer UV protection for up to 90 days of exposure — a valuable feature during phased construction.
Consider Ease of Installation
For DIY projects, choose underlayment with:
- Printed alignment guides
- Lightweight rolls
- Self-adhering or cap nail-friendly surface
This ensures quick, safe installation and prevents common errors like misalignment or wrinkling in your felt paper roof.
Check for Fire Ratings
Many local building codes in the U.S. require a certain level of fire resistance for roofing underlayment. Look for underlayments rated Class A for best protection, especially in wildfire-prone states like California.
Compare Brands and Read Reviews
Trusted brands like DuPont, Tyvek, and Roberts consistently offer high-performing roofing felt paper. Look for verified user reviews mentioning real-life use in your climate, especially regarding roof felt paper 15 vs 30 comparisons.
Balance Quality and Cost
Don’t base your decision solely on price. A slightly more expensive felt roofing paper may save thousands in future repairs. Compare warranties, lifespan, and customer service support from different manufacturers before you commit.
Conclusion
Investing in high-quality roofing felt paper is one of the smartest decisions a homeowner or contractor can make when protecting a property from the elements. Whether you’re dealing with heavy rainfall, snow, or intense sun, the right underlayment acts as a dependable moisture barrier beneath your shingles or tiles.
From traditional felt roofing paper to modern synthetic underlayment, today’s market offers a variety of solutions for every budget and building requirement. Products like DuPont Roof Protector, Tyvek Protec 120, and ZIP System Huber Flashing Tape ensure that your roofing structure remains resilient, even in the most unpredictable weather conditions.
By understanding the differences between roof felt paper, roofing felt tar paper, and synthetic felt paper roofing, you can confidently select the product that aligns with your roof type, climate, and long-term goals.
Whether you’re installing a new roof or upgrading an older one, don’t overlook the importance of a quality felt paper for roof. It’s the hidden layer that provides visible peace of mind — keeping water out, energy in, and your roofing system strong for decades.
Since you have read the entire article, you can view this article: Vinyl Soffit: 10 Best Picks That Instantly Boost Curb Appeal
Frequently Asked Questions
What is the purpose of roofing felt paper?
It acts as a moisture barrier, protecting your roof deck from leaks and water damage beneath shingles or tiles.
How do you install roofing felt paper?
Roll from bottom to top, overlapping layers by 2 inches. Secure with cap nails or staples every 6–12 inches.
Is roofing felt paper necessary under shingles?
Yes, it provides backup protection if shingles fail and improves roof durability and insulation.
Can roofing felt paper be reused?
No. Once removed, roof felt paper loses integrity and should always be replaced during re-roofing.
Which is better: roofing felt or synthetic underlayment?
Synthetic felt paper roofing lasts longer, resists tearing, and handles UV exposure better than traditional felt.
How thick should roofing felt paper be?
Standard options are 15 lb. or 30 lb.; thicker felt offers more durability and weather resistance.
Can I install felt paper on roof myself?
Yes, with basic tools and safety gear, felt roofing paper can be DIY-installed if the roof is not too steep or damaged.
Does roofing felt paper help with insulation?
Yes, it provides minor thermal and sound insulation beneath shingles or metal roofing.
What is the difference between tar paper and felt paper?
They’re often used interchangeably. Roofing felt tar paper typically refers to heavier, asphalt-saturated felt.
Where can I buy roofing felt paper?
It’s available at home improvement stores like Home Depot or online under terms like roofing felt paper Home Depot.
