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.
Vent stack through metal roof.
Air vent high efficiencypower attic fan 1470 cfm weatherwood galvanized steel electric power roof vent.
From up on the roof use a jigsaw or reciprocating saw to cut a 4 in.
Try to keep it close to the fan location.
Start in the attic and drill a hole through the roof in the desired vent location.
I really hate cutting holes in roofs but it was this or run 15 feet of vent hose through a gable end.
Amazon s choice for metal roof vent boot oatey 14052 25 4 master flash 8 x 8 base for use with profiled materials and can be installed on every type of roofing surface 0 25 5 75 1 4 inch 4 inch.
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With the pipe in a vertical position trace around the pipe using a pencil.
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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.
Inside diameter black new construction or reroof thermoplastic vent pipe roof flashing model pb 312 4bk 19 97 19 97.
Position the vent pipe up to the bottom of the roof.
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Oatey retro master roof flashing 1 4 in to 4 in x 8 in epdm rubber vent and pipe flashing.
Air vent 1 500 cfm black galvanized steel electric power roof vent.
Leave the drill bit sticking through the roof so you can find the hole.
Metal sheets 1 no caulk vent pipe 42 pipe boot flashing 5 pipe flashing 44 rain diverter 2 roof edge 1 roof jack 6 saddle.
Round penetrations round shapes such as plumbing vents or pipe supports for rooftop equipment should be flashed through the roof using epdm ethylene propylene diene monomer rubber pipe flashings.
Frame mounted hvac unit using pipe supports extending down to the building structure and flashed through the roof using rubber pipe flashings.
The penetration will be oval to have a round pipe exit vertically through a pitched roof you need an oval hole in the roof.