10 Best Underlayment For Metal Roof 2026 in the United States

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 ZIP System Peel and Stick Underlayment is designed to protect metal roofs from water damage, especially in vulnerable spots like eaves and valleys where ice dams and wind-driven rain are common. It’s made with a rubberized asphalt material that creates a strong, waterproof seal around nails, which helps prevent leaks effectively. The product is quite thin at 0.04 inches, making it lightweight and easy to handle during installation, and its slip-resistant surface adds safety while working on the roof.

It can withstand temperatures up to 260°F, which is helpful if you live in a hot climate or if the roof surface gets very warm. While UV resistance isn’t specifically mentioned, underlayments like this are typically covered by the metal roofing itself, so long sun exposure is usually not a big concern. The self-adhesive backing makes it quicker to install compared to traditional felt paper, saving time and effort.

One possible downside is that it may be heavier than some alternatives at 51 pounds due to its dense material, though this weight also suggests durability. This underlayment meets building codes for ice and water barriers, giving extra confidence in its reliability. If you want an easy-to-apply, waterproof layer to add protection under your metal roof, this product offers solid performance with a focus on durability and temperature tolerance.

The ZIP System Peel and Stick Underlayment is designed to offer robust protection against leaks and water damage, making it suitable for areas prone to ice dams or heavy rain, such as eaves and valleys. The material used is a high-performance rubberized asphalt, which is known for its durability and ability to seal around nails, enhancing its water resistance.

With a slip-resistant surface, this underlayment is relatively easy to install, even for those with less experience in roofing projects. Its maximum service temperature of 260 degrees Fahrenheit ensures that it can withstand high temperatures without degrading, adding to its reliability over time.

Its bulky size (66.7 x 1 x 0.04 inches) and weight (51 pounds) might make it difficult to handle for some users. Those with moderate to heavy roofing needs, especially in climates with significant ice or rain, will likely benefit the most from this underlayment.