Synthetic underlayment is a modern roofing material designed to provide a protective layer between the roof deck and the roofing material, such as shingles. Made from advanced polymers, it is lightweight, durable, and resistant to moisture, making it an effective barrier against water infiltration and wind damage. Unlike traditional felt underlayment, synthetic options often have a slip-resistant surface, which enhances safety during installation. They are also less prone to tearing and can withstand extreme temperatures, contributing to the longevity of the roof system. Overall, synthetic underlayment is a reliable choice for enhancing roof performance and durability.