The international residential code allows you to run a dryer vent through the attic but you can t terminate it there.
Run vent pipe thru roof.
The typical vent system consists of a network of pipes that connect to every drain p trap and extend via a main stack that pokes through the roof just above the main bathroom.
Turn the water on before you bring the hose onto the roof.
From up on the roof use a jigsaw or reciprocating saw to cut a 4 in.
Start in the attic and drill a hole through the roof in the desired vent location.
The true vent is aligned vertically and attaches to your drain line through the roof.
Vent pipes run from waste or drain pipes upwards ending outside the building usually sticking up through the roof.
In all cases the ducting needs to conduct the exhaust to the building exterior and needs to terminate in an animal proof vent cover.
Poke the vent pipe up through the rubber flange.
True vents also have no water running through them.
Doing so would fill your attic with warm moist air that could rot the framing.
How to install a vent pipe through a roof step 1.
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.
If any nails are not covered by shingles cover the heads with roofing cement.
Bath vent fan duct routing.
For one reason or another it may be impractical or impossible to construct this main vent through the roof so it s usually permissible to extend it from another part of the house.
Position the vent pipe up to the bottom of the roof.
To anchor the jack lift up some shingles and drive roofing nails.
Look inside the vent opening and clear out any debris you find.
Go into your attic.
This article describes routing bath exhaust fan duct upwards through an attic or roof space or downwards through a floor or crawl space.
Up through roof down through floor or crawl area.
Cut through the plywood and roofing material with your reciprocating saw.
With the pipe in a vertical position.
The lower half of the jack rests on top of shingles.
Slip the jack under the roof shingles at its upper half.
Is it acceptable to run 1 1 2 schedule 40 pvc through the roof for a new vent stack.
It lets air into the system filling the vacuums left by water moving through the pipe.
Try to keep it close to the fan location.
This allows unpleasant and potentially dangerous odors or fumes to safely leave your plumbing system escaping harmlessly into the air outside.
And the loop vent.
Remove the vent cover with the screwdriver and set it aside.
This will have 2 toilets two showers two sinks and one tub off this single vent in case someone wants to comment on size.
