Following manufacturer s instructions for securing the vent the roofer will likely spread plastic roof cement on the underside of the vent place it over the hole slip the flange under the top side shingles and lay the flange over the down slope shingles.
How to brace roof vent.
In this video i cover installing a roof boot for a vent pipe in a metal roof.
Hot air exhaust vents located at the peak of the roof allow hot air to escape.
Be sure the feet of the ladder are firmly planted on level ground and the top extends 3 feet above the roof line.
This is done by simply slipping the chimney pipe and securing it into place with the provided nut and bolt.
Taking advantage of this natural process referred to as passive ventilation is the most common way to vent an attic.
Brace the ladder by securing the lower portion with a rope to prevent the feet.