drewdin

Hi Guys,

I was in the attic the other day and i noticed the flexible duct that goes from my bathroom vent to the roof was pretty flimsy, is it worth insulating the ductwork and sealing the cap on the roof?

I tried a few google searches and it looks like there could be some condensation issues if its hot in the bathroom and cold in the attic and vice versa.

My question is, is it worth it? Thanks

nealtw

Yes you want to get the vapour out before it has a chance to condense. Condensing while in the attic may cause water to drip back into the fan or to lay in horizontal pipe in the attic. When it freezes it can open seams in the duct and appear like a roof leak.

drewdin

Thanks for the quick response, ill look into insulation for the duct, do you recommend any specific type?

kok328

Not sure what your intent is but, you can purchase pre-insulated duct at the big-box stores.
This is your best bet against warm/moist air condensating in the exhaust duct but, it still happens. The shorter the run, the better.

drewdin

Thanks, ill look into it when i get there. I dont really have any intent, i was just poking around the attic and i noticed that there was just some flexible ductwork and was curious if there was any way to improve or prevent any unwanted anything.

My friend always tells me that pre-mature upgrades are the root of all evil, i have not found any evil yet....

nealtw

If you get clumbsy and put your foot thru the ceiling while up there, he would be right.