How To Install A Vent Pipe Through The Roof

This old house general contractor tom silva shows how to properly install a roof mounted bath fan vent.

How to install a vent pipe through the roof.

See below for a shopping list and tools subscribe. The true vent is aligned vertically and attaches to your drain line through the roof. With the pipe in a vertical position trace around the pipe. Slide the vent under the shingles so they cover the top half of the vent flange.

Extend the vent pipe outside the building according to building regulations. Yes you can vent a range hood through the roof using a 6 single wall pipe. There can t be any drains above the point. Be sure to extend the pipe up at least 2 to 3 above the roof to prevent snow buildup from causing problems.

Install a sanitary tee. Choosing a whole house fan. Nail the lower corners with roofing nails and tar the heads. Apply a bead of asphalt roof cement on the bottom of the vent.

Follow the outline you marked. Cut through the plywood and roofing material with your reciprocating saw. True vents also have no water running through them. Install the vent and seal the underside of the vent flange with roofing grade sealant caulk.

The lower half of the flange sits on top of the shingles. Position the vent pipe up to the bottom of the roof. Usually the vent pipe must extend six inches above the roof or 12 inches 30 5 cm away from vertical walls but double check your building codes and requirements to make sure. Once we had the pipe extension connected we figured out where the new vent pipe would need to pass through the roof using a piece of scrap wood held flush with the pipe.

This is best implemented if a fixture rests close to the stack and the top floor of your home allowing the stack to serve as a vent. You can buy the proper flashing to install it on a flat roof and a roof cap that has screen around it to prevent insects from entering. Extend a pipe upward from the tee and tie it into the main vent stack. How to install a vent pipe through a roof.

Then flash it with the shingles that you removed prior on both sides and above the vent. Where the scrap wood hit the understructure of the roof we drilled a hole straight through to the outside. 4 repeat the ventilation process with any other fixtures you re installing.