I. Innovative Fiber Structure, Laying the Foundation for Enhanced Strength​

Many synthetic underlayment products adopt innovative designs, incorporating high - density fiber grids, such as HDPE grids

or high - strength PP fibers, as reinforcement materials. This initiative has significantly increased the tensile strength and tear

resistance of the products, far surpassing traditional asphalt felts. It is reported that the tensile strength of some underlayments

can reach several hundred pounds - force (lbf), and the tear resistance is in the range of 20 - 50 lbf, providing powerful mechanical

support for the roof.​

II. Resisting Installation Damage and Ensuring Construction Quality​

During the installation of roof underlayments, many challenges are often faced. Situations such as tool scratches, nail punctures,

foot trampling, and friction during material handling occur frequently. However, the unique molecular structure of the synthetic

membrane plays a crucial role. It can effectively prevent small damages from expanding into large tears, greatly reducing the risk

of damage to the integrity of the roof underlayment during the construction phase and laying a solid foundation for the smooth

progress of subsequent roof projects.​

III. Coping with Extreme Loads and Stabilizing Roof Structures​

When encountering severe weather such as strong winds and hurricanes, or when there are frequent passages of maintenance

personnel on the roof, the roof substrate will bear significant tension and shear forces. Under such extreme stress conditions,

synthetic underlayments demonstrate excellent performance and still remain intact. Their outstanding performance enhances

the stability of the entire roof, providing a reliable protective barrier for buildings.​