Core TradesQuestion 94 of 700
A vent terminating through the roof must extend a minimum height above the roof and be set back from any vertical surface or opening, MAINLY to:
a.Improve the roof's appearance
b.Reduce the pipe cost
c.Keep sewer gases away from windows and prevent blockage from snow or debris while allowing free air flow
d.Support the roof structure
Explanation
Roof vent terminations are set at a minimum height and distance from openings so escaping sewer gases disperse away from windows/air intakes and so the opening stays clear of snow and debris, maintaining venting airflow. Appearance, cost, and structural support are not the purpose.
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