DuraVent Model BV DSA Roof Flashing: a hand shaped base for metal or tile roofs
The DuraVent Model BV DSA Roof Flashing is the piece that surrounds the vent pipe where it passes through a metal or tile roof. Its soft aluminum base can be shaped by hand to follow tile ridges or corrugated metal. It fits roof slopes from flat to 6 in 12, so both your roofing material and roof slope matter when choosing this part. Model BV is DuraVent’s Type B gas vent, the double wall pipe that carries the exhaust from a gas furnace, boiler, or water heater out of the house.
Choose a 3, 4, 5, or 6 inch size to match your vent diameter. The storm collar is sold separately. This ring sits above the flashing, with a bead of silicone at the collar. The vent cap must stand at least 1 foot above roofs up to 7 in 12. Steeper roofs need more height, reaching 4 feet at 12 in 12, and the cap must be at least 8 feet from any wall. Have shingles instead? See the DuraVent Model BV Adjustable Roof Flashing for shingle roofs. The DuraVent Model BV DSA Roof Flashing ships free from My Cozy Outdoors with No Sales Tax (except WY) and the full manufacturer warranty.
Details
SKU: 3BVFDSA | 4BVFDSA | 5BVFDSA | 6BVFDSA
Applications
Duravent’s Type B Gas Vent system. Use with natural gas or liquid propane Category I and draft hood equipped appliances, and appliances tested and listed to use Type B Gas Vent. Applications include: natural gas fireplaces, gas-fired furnaces, boilers, water heaters, and wall or space heating applications.
Materials and Construction
Round Type B Gas Vent 3″ – 8″ and Oval 4″ – 6″: Aluminum .012″ inner wall, galvanized .018″ outer wall, in Canada, the lengths have a galvalume .018″ outer wall. The 3″ – 8″ Round gas vent features DuraLock® and DuraTab® . The Oval gas vent features the button lock.
Round Type B Gas Vent 10″ – 18″: Aluminum .014″ inner wall, galvanized .018″ outer wall. DuraLock® feature for 10″ and larger diameters.
Round Type B Gas Vent 20″ – 30″: aluminum .023″ inner wall, galvanized .018″ outer wall. DuraLock® feature for 10″ and larger diameters.
Clearances
Clearances to combustible materials in single and multi-family dwellings:
- 1″ Clearance – USA – 3″ to 30″
- 1″ Clearance – Canada – 3″ to 24″
- 2″ Clearance – Canada – 26″ to 30″
Annular insulating air space
- 3″ – 8″ Round Vent: 1/4″ air space
- 4″ – 6″ Oval Vent: 1/4″ air space
- 10″ – 30″ Round Vent: 1/2″ air space
Diameters
Listings
UL Listed to UL 441 and CAN/ULC-S605 (MH2848 and MH17667).