How High Above The Roof Should A Vent Be

Plumbing books vary in their advice.

How high above the roof should a vent be. 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. Vertical blue line along the left side of the chimney in our photo. Make sure the stack to protrude a minimum of 15 cm 6 inches from the roof. The slope is about 4 high for every 12 horizontal.

A vent terminal and depending if the roof is strictly for weather protection it terminates about 24 above the roof. You are letting air into the plumbing system of the house. I have a main vent and a sink vent and both are only 6 high above the roof. Above the roof plumbing vent height.

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. If the roof area is for people then it is 7 ft above the roofing surface. Some builders recommend a minimum of 30 cm 12 inches.

For gas vents or a type l vent this distance above the roof surface must be at least 2 ft 0 61m. 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. Upc i 906 1 and 906 2. 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.

This specification makes sure steep roof slopes are cleared. The 6 you describe should be just fine. 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.