Dampness around bathroom extractor fan

[mehmetagop]

Hi,
In our bathroom we have Envirovent ECO DMEV T LC extractor fan. This is a top floor flat with the duct from the extractor running through the attic to the roof. When we take a shower the ceiling around the extractor is getting damp and we have now a yellow ring formed. Initially we suspected a problem with condensation running down the duct but the specialist said the attic and duct is bone dry. And the extractor is dry too. Could the issue be a lack of sealant around the extractor?
Thanks
Mehmet

 

[jj4091]

I would say that is definately a problem with condensation and should have a trap fitted between the the fan and the hose.

Extractor Fan Condensation Trap With Overflow

Fitting this extractor fan condensation trap will help to catch any moisture and remove it from the ducting run. Suitable for use with 110mm solid ducting, the trap is designed with an overflow pipe connector for easy draining.• Designed for use with 110mm solid ducting• Catches and removes...

www.toolstation.com

Obviously I cannot see it but any condensation would be on the inside of the hose not the outside and would settle on the plasterboard as it probably does not go through it. Therfore not run into the fan, so I'm a bit sceptical about how hard your specialist looked at the set up.

 

[noseall]

Hi,
In our bathroom we have Envirovent ECO DMEV T LC extractor fan. This is a top floor flat with the duct from the extractor running through the attic to the roof. When we take a shower the ceiling around the extractor is getting damp and we have now a yellow ring formed. Initially we suspected a problem with condensation running down the duct but the specialist said the attic and duct is bone dry. And the extractor is dry too. Could the issue be a lack of sealant around the extractor?
Thanks
Mehmet

View attachment 419608
View attachment 419609

Duct tape insulation around the hose.