Bathroom Ventalation

[FREEFALL]

I have owned my house for 5 years and have just recently notices the bathroom vent leaking. It has not happened before until now. When I went up to the attic to investigate, the conduit connecting the fan to the outlet through the roof fell off. So I put it back on. Still leaks. I extended it to make a horizontal part in the conduit thinking condensation was the problem, and it still leaks. Could it still be condensation, because the conduit isn't insulated and winter temps are about -30 celcius.


PLEASE GIVE ME SOME KIND OF INSITE!!

FREEFALL

[AllanJ]

Yes it could be condensation. You could go up and disconnect the loose joint and feel inside the duct at different times.

Ultimately the duct joints need to be sealed (that's what duct tape is for!) and not letting inside air into the attic. This would avoid condensation and rotting up in the rafters and also warming of the attic space leading to snow melt and ice dam problems on the roof.

[CR500]

Insulating the duct in the attic and running the fan after all the moisture is out of the bathroom will help reduce the chance of condensation leaking back into the room.

[Bismarck Jack]

Isnt expelling the moisture out of the bathroom part of the fans function? Especially those hot showers? :fisheye:

[FREEFALL]

Thanks for the info folks, muchly appreciated. Looks like I got a little crawling left ahead of me after all.

[suemarkp]

Also, check the flapper on the vent fan (hopefully it has one). If it doesn't, warm air will convect out that fan opening wasting heat to the outside. It will also probably condense near the top by the roof opening and eventually drip down the vent.

The only time you want warm air in that vent pipe is when the fan is blowing.