The water will condense and drip into the insulation below and perhaps into the house.
Flue thru roof.
A single wall metal flue vent is not safe if it passes through combustible floors walls ceilings roofs.
If your furnace has an afue rating below 90 percent it will most likely have a flue pipe that goes up through your roof.
Plumbing questions answers tips and tricks.
Position the vent pipe up to the bottom of the roof.
Putting a flue pipe or chimney through a sedum roof sedum roofs are becoming ever more popular and many customers have come to us wanting to put a twin wall insulated flue pipe through their sedum roof so that they can install a stove.
This wall prevents deterioration from constant contact with corrosive flue gases.
Flashings for a sedum roof.
Reply to vertical flue through a polycarb roof.
That s because the combustion byproducts are in a gaseous form so the gases can float up through the flue pipe and out of your roof.
Additionally they allow offsets to route the system around framing or other obstacles.
They also allow the use of fire stops for passing the system through each combustible floor.
The proper term for this connector is a flue vent connector but plenty of normal people use the word flue or the phrase stack pipe loosely for any sort of chimney or chimney connector.
Go into your attic.
The penetration will be oval to have a round pipe exit vertically through a pitched roof you need an oval hole in the roof.
Both systems use a stainless steel inner flue wall.
First you ll partially block your roof vent with the piping reducing the flow of cooling air through your attic.
This is relatively easily done.