10 Best Underlayment For Metal Roof 2025 in the United States

The FT Synthetics Platinum HT Butyl Self Adhering Underlayment stands out as a solid choice for those looking to install or upgrade a metal roof. One of its key strengths is the 100% butyl composition, which ensures a strong bond to plywood or OSB roof decks. This self-adhering feature makes installation easier, especially for DIY enthusiasts or contractors. With a thickness of 41 mils, it provides robust protection and durability. Additionally, it is compatible with low slope roofing materials such as EPDM and TPO, which is a plus for varied projects.

Water resistance is another highlight; the underlayment offers watertight laps, effectively preventing leaks and ensuring longevity in various weather conditions. Its temperature tolerance and UV resistance make it suitable for diverse climates, enhancing its utility across regions.

While it performs well, there are some factors to consider. The coverage per roll is 200 square feet, which may require purchasing multiple rolls for larger roofs, potentially increasing costs. Its weight at 40 lbs per roll can also be cumbersome and may require additional handling considerations during installation. This product is ideal for homeowners or professionals seeking reliable underlayment for metal roofs, particularly where low slope options are involved. However, those with larger projects should plan for extra rolls and consider the installation weight.

The Titanium PSU30 Peel & Stick Roof Underlayment comes as a pallet of 25 rolls, making it well-suited for larger roofing projects. It stands out with its watertight asphalt-to-asphalt lap system, ensuring excellent water resistance, which is crucial for protecting a metal roof from leaks. The underlayment performs well in a wide range of temperatures, from -40°F to 240°F, making it versatile for various climates.

Its up to 6 months UV exposure rating adds to its durability, as it can withstand prolonged exposure to the sun without degrading quickly. Installation is made safer and easier with the patented SURE-FOOT slip-resistant technology, an essential feature for roof work. Each roll is 72 feet long, 36 inches wide, and weighs 48 lbs, providing a substantial coverage of 2 square per roll.

The material's minimum thickness of 45 mils is robust, contributing to its durability and protective capabilities. A potential drawback is the product’s weight, which could be cumbersome during installation. For someone looking for effective underlayment that is easy to install and provides strong water and UV resistance for metal roofs, the Titanium PSU30 is a strong contender.

The MFM Peel & Seal Self Stick Roll Roofing is designed specifically for users looking for an effective underlayment solution for metal roofs. One of its key strengths is its waterproof seal, which is essential for protecting your roof from leaks and moisture. The material is aluminum, ensuring durability, and its thickness of 45 mils offers a solid barrier against the elements. Additionally, this product is easy to install; it sticks to almost any surface without the need for additional adhesives, making it a great option for DIYers. It's particularly beneficial for those with RVs and trailer homes due to its compatibility with low slope and low pitch roofs.

The roll length of 33 feet 6 inches might be limiting for larger projects, meaning multiple rolls could be necessary.

The MFM Peel & Seal is a strong choice for those in need of reliable underlayment for low slope metal roofs, especially for smaller applications or recreational vehicles. However, potential buyers should keep in mind the environmental conditions they are working in and plan their material needs accordingly.