How High Above The Roof Should A Vent Be

Above the roof plumbing vent height.

How high above the roof should a vent be.

Upc i 906 1 and 906 2. The top of the chimney should be at least 3 ft 0 92 m above the roof surface. A vent terminal and depending if the roof is strictly for weather protection it terminates about 24 above the roof. Vertical blue line along the left side of the chimney in our photo.

I have a main vent and a sink vent and both are only 6 high above the roof. That means that when there is mechanical equipment on the roof sun decks you name it the plumbing vents need to extend up above the roof 7 feet. A vent stack is not like a chimney which requires 2 higher than any roof within 10. If there is no vapor barrier double it to one square foot of nfa for every 150 square feet of attic floor space half for intake half for exhaust.

Make sure the stack to protrude a minimum of 15 cm 6 inches from the roof. The 6 you describe should be just fine. Plumbing books vary in their advice. This specification makes sure steep roof slopes are cleared.

In other words the highest point within a 10 foot circle of the pipe. You are letting air into the plumbing system of the house. If your attic floor has a vapor barrier you will need one square foot of nfa per every 300 square feet of attic floor area half of that will be intake half for exhaust. The slope is about 4 high for every 12 horizontal.

For gas vents or a type l vent this distance above the roof surface must be at least 2 ft 0 61m. Vent pipes should extend to outdoors above the building roof and should terminate vertically not less than 6 above the roof surface nor more than 24 and must be at least 12 from any vertical surface such as a nearby sidewall. If the roof area is for people then it is 7 ft above the roofing surface.