Roof Vent Clearances

Table of rooftop chimney clearances for metal b vent chimneys flues.

Roof vent clearances.

1 5 feet above the roof surface. 1 0 foot above the roof surface 1 7 12 to 8 12. Exhaust vents must be protected against rain and equipped with back flow prevention features e g flap dampers. To a height of only 2 in.

The quench vent should be a minimum of 5 m above walking surfaces. Manufacturers recommendations usually take precedence over local building codes but you won t know for sure which takes precedence or what those manufacturers recommendations are. The exit point for the quench vent pipe should be located away from operable windows and air inlets. The vent when protected from snow closure by the panel design can be cut down from the minimum height of 6 in.

2 5 feet above the roof surface. 2 0 feet above the roof surface. Window or fresh air intake. Exhaust vents must not be allowed to be obscured or hidden by vegetation.

Minimum height above the roof surface 1 flat to 7 12. Roof pitch rise run in inches. New york state just raised plumbing vent pipe code from 12 inches to 18 inches above the roof and at least 10 feet horizontal distance from any opening to the building i e. The vent opening must communicate with outside air over an area no less than the area of the vent pipe measured on the inside.

Vegetation must not be allowed to grow within 3 feet of an exhaust vent.