condensation in loft ?

benson271

hi I have recently  noticed a lot of water droplets in the loft mostly directly under the bathroom as well as mould near soffit vents when opening bathroom window.

anyone know the cause of this ?

 can it be that the hot steam when showering having window open  is traveling straight through the soffit vents in to the loft or I need a new extractor fan ?

have just put some felt lap vents

tacpot12

If the fan runs ok, the solution may just require the duct to be checked/upgraded. The mould under the soffit looks suspiciously like the fan isn't venting out where it should, or isn't venting out properly. 

It's not clear where the duct from the extractor fan is in your photo. Is it the flexible grey duct, or the brown duct that is partially hidden behind the timber brace? 

You need to check that the duct doesn't have any leaks and hasn't become disconnected from the external terminal. If the duct is felxible, you should replace it with rigid duct to increase the distance that the fan can push the moist air away from the building. 

You should also consider insulating the duct and possibly also fitting a condenstaion trap like this one: https://www.fastlec.co.uk/condensation-trap-100-110mm-with-overflow-connection

This will catch any condesation and pipe it outside of the loft space. 

Lorian

also check the soffit vents are not blocked by the insulation. 

benson271

tacpot12 said:

If the fan runs ok, the solution may just require the duct to be checked/upgraded. The mould under the soffit looks suspiciously like the fan isn't venting out where it should, or isn't venting out properly. 

It's not clear where the duct from the extractor fan is in your photo. Is it the flexible grey duct, or the brown duct that is partially hidden behind the timber brace? 

You need to check that the duct doesn't have any leaks and hasn't become disconnected from the external terminal. If the duct is felxible, you should replace it with rigid duct to increase the distance that the fan can push the moist air away from the building. 

You should also consider insulating the duct and possibly also fitting a condenstaion trap like this one

This will catch any condesation and pipe it outside of the loft space. 

its the grey flexible duct ,thanks for the recommendation will try getting this fitted as well as a new extractor fan as my current one is barely making noise