Looking for the best ASTM certified roof underlayments? We’ve got you covered with a simple guide to the top 10 options, making it easy to find the perfect fit for your roofing needs.
Choosing the right roof underlayment is key to protecting your home. ASTM certified products ensure top quality and long-lasting performance. This guide will help you find the best options for your needs.
ASTM standards mean tough testing and proven results. These underlayments keep water out and stand up to weather. They are easy to install and built to last.
With so many choices, finding the perfect fit can feel hard. But don’t worry—this guide makes it simple and clear. Get ready to discover the best and protect your roof like a pro.
List of Top 10 ASTM Certified Roof Underlayments
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FT Synthetics Platinum HT-B Self-Adhering Roofing Underlayment, 41 mil, High-Temp Ice & Water Shield, 100% Butyl, Nail Sealable, UV Resistant, ASTM Certified, Lifetime Warranty (36″ x 67′) |
FT Synthetics Platinum HT-B is perfect for homeowners and contractors who want reliable, long-lasting roofing protection. It’s ideal for low-slope roofs and works great with EPDM and TPO materials. |
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SIPA 100 GSM Synthetic Waterproof Roof Underlayment 48” x 250′ (10) |
This SIPA 100 GSM Synthetic Waterproof Roof Underlayment is perfect for homeowners and contractors who need a reliable, long-lasting solution for sloped roofs. It’s ideal for both commercial and residential projects, offering water resistance and durability that won’t buckle, warp, or crack. |
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SIPA Synthetic Waterproof Roof Underlayment 48” x 250′ (72) |
This is perfect for roofers, builders, and homeowners who want strong, safe, and easy roof protection. It suits anyone who needs a tough, dry, and steady base under shingles or metal. |
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FT Synthetics Platinum HT-SA Ice & Water Roofing Underlayment, 41 mil, 36″ x 67′, High-Temp, Self-Adhering, Nail Sealable, UV Resistant, ASTM/CSA Certified, Lifetime Warranty |
This FT Synthetics Platinum HT-SA is perfect for homeowners and contractors who want strong, long-lasting roof protection. It’s easy to install and works great in hot weather, making it ideal for any roofing project. |
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ANJON EPDM Roofing Rubber – 5 ft x 50 ft | 60-Mil Commercial Grade Roof Membrane for Flat Roofs, RVs & Waterproofing Projects |
This heavy-duty roofing is perfect for anyone needing long-lasting protection for flat roofs, RVs, or waterproofing projects. It’s ideal for commercial use and high-traffic areas, offering extra strength and flexibility for easy installation. |
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ANJON EPDM Roofing Rubber – 20 ft x 45 ft | 60-Mil Commercial Grade Roof Membrane for Flat Roofs, RVs & Waterproofing Projects |
This heavy-duty roofing is perfect for anyone needing long-lasting protection for flat roofs, RVs, or waterproofing projects. It’s ideal for commercial buildings, high-traffic areas, and RV owners who want durable, weather-resistant coverage. |
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HydroShield 50 Year Synthetic Underlayment Single Roll |
HydroShield 50 Year Synthetic Underlayment is perfect for homeowners and contractors who want long-lasting protection and easy installation. It’s ideal for roofing projects needing reliable water shedding and clear guidelines. |
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Atlas Roofing Summit 60 Synthetic Felt (Single Roll) |
Atlas Roofing Summit 60 Synthetic Felt is perfect for homeowners and contractors looking for a reliable, water-resistant roofing solution. It’s ideal for any roof style and lays flat with fewer air pockets, making it easy to install. |
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INTERWRAP, Roofing Felt Repl 42inx286ft, ROLL |
INTERWRAP Roofing Felt is perfect for homeowners and contractors looking for a strong, easy-to-install underlayment. It’s ideal for steep roofs under asphalt, synthetic, or metal shingles and cedar shakes. |
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HydroShield 25 Year Synthetic Underlayment Single Roll |
HydroShield 25 Year Synthetic Underlayment is perfect for homeowners and contractors who want reliable, long-lasting protection for their roofs. It’s easy to install and built to last, making it ideal for anyone looking for peace of mind and great value. |
Detailed Reviews
Discover the top 10 ASTM Certified Roof Underlayments, carefully selected for durability, performance, and value. Each product is expert-reviewed and backed by customer feedback, ensuring you get the best protection for your roof. Whether you need high-temp resistance, UV protection, or easy installation, this guide has you covered. Find the perfect underlayment to keep your home safe, dry, and long-lasting.
1. FT Synthetics Platinum HT-B Self-Adhering Roofing Underlayment, 41 mil, High-Temp Ice & Water Shield, 100% Butyl, Nail Sealable, UV Resistant, ASTM Certified, Lifetime Warranty (36″ x 67′)
The FT Synthetics Platinum HT-B is a self-adhering roofing underlayment designed for high-temp and ice & water protection. It bonds strongly to plywood or OSB roof decks and works well with low slope roofing materials.
This 41 mil thick underlayment is nail sealable, has watertight laps, and offers 180-day UV resistance. Each roll covers 200 square feet and comes with a limited lifetime warranty.
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Perfect For:
FT Synthetics Platinum HT-B is perfect for homeowners and contractors who want reliable, long-lasting roofing protection. It’s ideal for low-slope roofs and works great with EPDM and TPO materials.
Ready to Purchase?
2. SIPA 100 GSM Synthetic Waterproof Roof Underlayment 48” x 250′ (10)
This roof underlayment is strong. It stays flat. It keeps water out.
Each roll covers 1,000 square feet. It is light and easy to use.
It holds up under sun for 60 days. It will not warp or crack.
Use it on sloped roofs. Use it under metal or shingles. Enjoy simple, solid protection.
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Perfect For:
This SIPA 100 GSM Synthetic Waterproof Roof Underlayment is perfect for homeowners and contractors who need a reliable, long-lasting solution for sloped roofs. It’s ideal for both commercial and residential projects, offering water resistance and durability that won’t buckle, warp, or crack.
Ready to Purchase?
3. SIPA Synthetic Waterproof Roof Underlayment 48” x 250′ (72)
The SIPA Synthetic Waterproof Roof Underlayment gives strong, steady cover for your roof. It lays flat and stays firm in all conditions.
It meets tough ASTM standards and holds up under sun for 60 days. It works well on sloped roofs for homes or large buildings.
It stays smooth. It stays dry. It stays strong.
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Perfect For:
This is perfect for roofers, builders, and homeowners who want strong, safe, and easy roof protection. It suits anyone who needs a tough, dry, and steady base under shingles or metal.
Ready to Purchase?
4. FT Synthetics Platinum HT-SA Ice & Water Roofing Underlayment, 41 mil, 36″ x 67′, High-Temp, Self-Adhering, Nail Sealable, UV Resistant, ASTM/CSA Certified, Lifetime Warranty
The FT Synthetics Platinum HT-SA is a heavy-duty roofing underlayment. It’s 41 mil thick for superior protection. This product keeps your roof deck safe and dry.
It meets strict standards like ASTM and CSA. It’s also UV resistant for up to 180 days. This ensures long-lasting performance.
Installation is fast and easy. The split release liner saves time. Plus, it comes with a lifetime warranty for peace of mind.
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Perfect For:
This FT Synthetics Platinum HT-SA is perfect for homeowners and contractors who want strong, long-lasting roof protection. It’s easy to install and works great in hot weather, making it ideal for any roofing project.
Ready to Purchase?
5. ANJON EPDM Roofing Rubber – 5 ft x 50 ft | 60-Mil Commercial Grade Roof Membrane for Flat Roofs, RVs & Waterproofing Projects
ANJON EPDM Roofing Rubber is a heavy-duty solution for flat roofs, RVs, and waterproofing projects. It’s made from ultra-durable 60-mil EPDM rubber, built to last in tough conditions. This commercial-grade membrane meets high standards for strength and safety.
It’s perfect for high-use areas like commercial roofs and multi-unit buildings. The Low Slope Fire Retardant (LSFR) design adds extra safety and protection. It’s flexible yet strong, making installation easy on uneven surfaces.
For RV owners, this membrane offers long-term durability against UV exposure and travel wear. Order slightly larger than your roof size to ensure full, stress-free coverage. It’s a smart investment for lasting protection.
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Perfect For:
This heavy-duty roofing is perfect for anyone needing long-lasting protection for flat roofs, RVs, or waterproofing projects. It’s ideal for commercial use and high-traffic areas, offering extra strength and flexibility for easy installation.
Ready to Purchase?
6. ANJON EPDM Roofing Rubber – 20 ft x 45 ft | 60-Mil Commercial Grade Roof Membrane for Flat Roofs, RVs & Waterproofing Projects
ANJON EPDM Roofing Rubber is a heavy-duty solution for flat roofs, RVs, and waterproofing projects. Made from 60-mil EPDM rubber, it’s built to last long and resist punctures, shrinkage, and weather damage.
It’s perfect for commercial use, easy to install, and stays flexible in extreme cold. This membrane is fire retardant and meets high safety standards.
Order slightly larger than your roof for full coverage. Ships via LTL freight, so accurate contact info is key for smooth delivery.
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Perfect For:
This heavy-duty roofing is perfect for anyone needing long-lasting protection for flat roofs, RVs, or waterproofing projects. It’s ideal for commercial buildings, high-traffic areas, and RV owners who want durable, weather-resistant coverage.
Ready to Purchase?
7. HydroShield 50 Year Synthetic Underlayment Single Roll
HydroShield 50 Year Synthetic Underlayment is a reliable roofing solution. It comes with a 50-year warranty to keep water out. This product is built to last.
The roll covers 10 squares and measures 250 lineal feet long. It’s 48 inches wide and weighs just 2.0 pounds per square. Installation is fast and easy with pre-printed nailing patterns.
This underlayment meets strict industry standards. It’s tested and compliant with multiple ASTM codes. Choose HydroShield for long-lasting protection.
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Perfect For:
HydroShield 50 Year Synthetic Underlayment is perfect for homeowners and contractors who want long-lasting protection and easy installation. It’s ideal for roofing projects needing reliable water shedding and clear guidelines.
Ready to Purchase?
8. Atlas Roofing Summit 60 Synthetic Felt (Single Roll)
Atlas Roofing Summit 60 is a top-quality synthetic felt designed for any roof style. It lays flatter than traditional felt, reducing air pockets. This makes it a reliable choice for your roofing needs.
It offers 60-day UV protection and is water-resistant, ensuring durability. The coverage area is impressive, with 10 squares using a 2-inch lap. Its dimensions are 250 feet long and 48 inches wide.
This product is easy to work with and provides excellent performance. It’s a smart investment for any roofing project. Choose Atlas Summit 60 for a smooth, long-lasting roof.
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Perfect For:
Atlas Roofing Summit 60 Synthetic Felt is perfect for homeowners and contractors looking for a reliable, water-resistant roofing solution. It’s ideal for any roof style and lays flat with fewer air pockets, making it easy to install.
Ready to Purchase?
9. INTERWRAP, Roofing Felt Repl 42inx286ft, ROLL
INTERWRAP Roofing Felt is a strong, synthetic replacement for traditional #15 or #30 oil-saturated felt. It’s designed for steep slope roofing under asphalt, synthetic, metal, or cedar shake roofs.
This product is 12 times stronger than #30 felt and meets top industry standards. It’s wider, lighter, and covers more area, making it easier to install.
The synthetic material is mold-proof, water-resistant, and UV-protected. It lays flat without wrinkling, ensuring a smooth, durable finish.
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Perfect For:
INTERWRAP Roofing Felt is perfect for homeowners and contractors looking for a strong, easy-to-install underlayment. It’s ideal for steep roofs under asphalt, synthetic, or metal shingles and cedar shakes.
Ready to Purchase?
10. HydroShield 25 Year Synthetic Underlayment Single Roll
HydroShield is a 25-year synthetic underlayment designed to protect your roof. It comes with a guaranteed warranty to shed water effectively. This product is built to last and perform.
It features a pre-printed nailing pattern and overlap lines for fast installation. Each roll covers 10 squares and measures 250 lineal feet in length. It’s lightweight at 1.8 pounds per square.
HydroShield meets strict industry standards like ASTM and ICC codes. It’s a reliable choice for any roofing project. Trust it to keep your home safe and dry.
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Perfect For:
HydroShield 25 Year Synthetic Underlayment is perfect for homeowners and contractors who want reliable, long-lasting protection for their roofs. It’s easy to install and built to last, making it ideal for anyone looking for peace of mind and great value.
Ready to Purchase?
Buying Guide
Choosing the right roof underlayment is key to protecting your home. ASTM certified products ensure top quality and long-lasting performance.
Finding the best roof underlayment can feel overwhelming, but this guide makes it simple and clear. Discover the top options and learn what to look for to protect your roof like a pro.
Here’s what to consider when buying:
- Material: Choose between synthetic or rubber underlayments. Synthetics are lightweight and easy to install, while rubber offers heavy-duty protection for flat roofs.
- Thickness: Thicker underlayments (like 41 mil or 60 mil) provide better durability and water resistance.
- UV Resistance: Look for products with UV protection (up to 180 days) to prevent sun damage during installation.
- Coverage Area: Check the square footage each roll covers to ensure you buy enough for your project.
- Warranty: Opt for products with lifetime or long-term warranties for peace of mind.
- Ease of Installation: Features like self-adhering or pre-printed nailing patterns make installation faster and simpler.
- Weather Resistance: Ensure the underlayment is waterproof and can handle extreme weather like ice, heat, or UV rays.
- ASTM Certification: Always choose ASTM certified products for proven quality and performance.
With these factors in mind, you’ll find the perfect roof underlayment to keep your home safe and dry.