Air and vapor barriers play a critical role in protecting the roofing assembly from the inside out. Uncontrolled air movement and vapor migration can introduce moisture into the system, leading to condensation, reduced insulation performance, and long-term damage to the building envelope.
Engineered to create a continuous, impermeable layer, Polyglass’ air and vapor barriers help prevent moisture intrusion, maintain thermal efficiency, and support the long-term stability of roofing materials, especially in demanding environments or high-humidity occupancies.
Beyond moisture control, air and vapor barriers also enhance system performance under extreme conditions. By limiting air infiltration beneath the membrane, they reduce uplift pressures and help improve resistance to wind-driven rain, making them an essential component for coastal and hurricane-prone regions.
