DuraVent FasNSeal Variable Pitch Roof Flashing for W2: match your vent size for flat or sloped roofs
The DuraVent FasNSeal Variable Pitch Roof Flashing for W2 is the weather barrier around a vent passing through the roof. This is the single wall part listed here for a W2 run. It fits roofs from flat up to a 9 in 12 pitch. Choose a 4 to 16 inch size that matches your vent, without going larger. A storm collar, the ring covering the gap above the flashing, is required. No roof jack is needed.
FasNSeal W2 is DuraVent’s double wall stainless steel vent for high efficiency gas boilers, furnaces, and water heaters, with an air space between its two walls. W2 can sit as little as 1 inch from materials that can burn, depending on the appliance’s exhaust temperature and whether the run is exposed or boxed in. It also allows an outdoor run below the roof line without an enclosure. Using single wall vent? See the DuraVent FasNSeal Variable Pitch Roof Flashing for single wall vent. The DuraVent FasNSeal Variable Pitch Roof Flashing for W2 ships free from My Cozy Outdoors with No Sales Tax (except WY) and the full manufacturer warranty.








Commercial projects may require custom parts and unique system designs. Duravent offers complete project assistance:








































