How High Above The Roof Should A Vent Be

Make sure the stack to protrude a minimum of 15 cm 6 inches from the roof. If the pipe is farther than 10 feet from the roof peak it must be 2 feet above the highest point of the roof within 10 feet. 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.

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Above the roof plumbing vent height.

How high above the roof should a vent be.

For gas vents or a type l vent this distance above the roof surface must be at least 2 ft 0 61m. Plumbing books vary in their advice. Open vent pipes that extend through a roof shall be terminated at least 6 inches 152 mm above the roof or 6 inches 152 mm above the anticipated snow accumulation whichever is greater except that where a roof is to be used for any purpose other than weather protection the vent extension shall be run at least 7 feet 2134 mm above the roof. In other words the highest point within a 10 foot circle of the pipe.

The top of the chimney should be at least 3 ft 0 92 m above the roof surface. The 6 you describe should be just fine. Some builders recommend a minimum of 30 cm 12 inches. Vertical blue line along the left side of the chimney in our photo.

If the roof area is for people then it is 7 ft above the roofing surface. A vent terminal and depending if the roof is strictly for weather protection it terminates about 24 above the roof. Upc i 906 1 and 906 2. 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.

This specification makes sure steep roof slopes are cleared. A vent stack is not like a chimney which requires 2 higher than any roof within 10. I have a main vent and a sink vent and both are only 6 high above the roof. 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.

You are letting air into the plumbing system of the house. The slope is about 4 high for every 12 horizontal. 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.

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