High-density polyethylene (Black) for BUR and modified bitumen applications
U.V. stabilized PVC (White) for PVC membrane and polyurethane foam applications
Locking, the vandal-proof cap prevents entry of wind-blown rain or snow
Inexpensive, simple, and easy to install
One Way: Special one-way nitrile rubber valve prevents moisture from re-entering the roofing system
Two Way: Same features as one way without valve which will allow for both exhaust and convective movement of air between breathers