Help regarding bathroom fan

[hi-revs]

I ripped out the old bathroom fan in my ensuite as it was junk and replaced it with a more powerful one.
Nothing needed to be modified as it was just plug and play to get it working.

Heres my question:
Is a vapor barrier needed?
The vapor barrier im talking about is ones that go around the top of the fan. Its box-shaped. Made of hard plastic. (Not talking about the vapor barrier on the drywall. I didnot have to cut that to install the new fan)

Was told that i needed one, so i duct tapped one on there, after cutting it to size/fit. But now theres condensation building up inside btwn the inside of the barrier and the top of the fan.
Theres no condensation/water on the hose thats connected to the fan running to the vent outside my house.

I can access the bathroom fan from my attic, if it helps.


The vapor barrier im referring to looks like this: https://us2.cert-secured.com/baeec48...iddle_sa59.jpg

[fliptuner]

IMO, if it worked fine before and there's no sign of mold in the attic and you have sufficient air circulation up there, take it off.

BTW duct tape isn't for ducts lol.

[GLOW]

duct tape is for everything else