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.

The SIPA 100 GSM Synthetic Waterproof Roof Underlayment is designed for both residential and commercial roofs, including metal roofing applications. It uses a non-woven polypropylene material laminated with polyethylene, which makes it waterproof and durable. Its 100 GSM thickness provides a solid barrier without being too bulky, balancing protection and ease of handling. One of its strong points is its excellent water resistance, ensuring your roof stays dry under harsh weather conditions. It also offers UV resistance for up to 60 days, which is helpful during installation before the final roofing goes on.

The Tyvek Protec 120 Roof Underlayment is a well-regarded option for those looking to install or repair metal roofs, as well as other roofing types like asphalt and cedar shingles. One of its standout features is its trusted quality from DuPont Tyvek, which brings durability and reliability to your roofing project. With a decent thickness of 6.3 inches, it provides a solid barrier against moisture, which is crucial for preventing leaks and damage over time. Additionally, the underlayment boasts excellent water resistance and UV protection, vital for roofs exposed to harsh weather conditions and sunlight.