Huge condensation in the bathroom, what to look..?

Emmia

sujsuj said:

Emmia said:

I'd also crack open the window(can you open and lock it slightly open) it will really halp reduce the humidity and dampness, although I realise it's less than ideal with the road

road and cold both will not help in this...Asking a teen to open window after using shower is pointless. 

A slightly cracked window ALL the time will increase ventilation, reducing the humidity, and dampness in the room, especially if the room is already cold.

Do you shut the door on the steamy shower after it's been used to stop the rest of the house being damp?

Bendy_House

Your son probably won't want the bathroom door ajar whilst showering, but could do this as soon as he steps out at the end? The idea is for a steady through-flow of air, to displace what's in there. There 'should' be enough from a gap under the door (probably the best source), but just in case the door seals too well. 

The single biggest cure tho', is 'extraction', or else that moisture-laden air will remain.

Joe9090

If it's any help we have just moved into a new house with a fan like yours in the bathroom. I think they are next to useless but luckily we have a couple of windows which we open after anyone who has a shower and the condensation clears within half an hour.
Our main problem is the condensation in the kitchen which only has a useless self circulating fan. Even if we have the windows open it still takes ages for the condensation to clear!

Norman_Castle

sujsuj said:

Flexi pipe to the right of the fan has been flattened to accommodate the loft insulation. Adjust this so its as straight as possible or with minimal sharp bends. Tear the insulation and fit it under the pipe.

I'd suspect that alone could be halving the efficiency of the fan.

aoleks

1. you need a better fan, one that continues extracting until the humidity is gone. we're talking closer to 20 minutes, not 2...
2. when you shower/take a bath, open the window. no fan is strong enough to remove that volume of hot damp.
3. get a window wiper and use after every shower/bath. quickly remove drops from the walls and shower screen/mirror.
4. is the bathroom heated? like a new temperature all round?

jennifernil

I would dedicate the hole in the ceiling to a powerful fan, with as much rigid ducting as possible.

If you need that light, you have access from above to fit one nearby, so an easy job.

I would say you need an over-run time of at least 15 minutes on the fan.

Mardle

I would have thought the best option would be to pension off the ducted extractor and install a trickle or humidistat extractor in the exterior wall.

We have a wet room with a trickle extractor with a humidistat boost which soon dries the room completely.

another_casualty

Bathroom paint is called that for a reason . Wouldn't use anything else .
Perhaps get trickle vents for the window ? 

The fan / extractor is worse than hopeless imho , and as others have mentioned replacing is the way to go with a proper extractor . That hanging bulb is confusing , as well as an eyesore . 

Buying a decent dehumidifier and leaving it on while keeping bathroom doors for a good few hours should dry everything out initially anyway and make a difference .

My windowless bathroom has a very good extractor which stops about 3 mins or so  after I turn off lightswitch. Maybe the OP's is running longer because of the amount of humidity etc and trying to do its job is wearing it out ..

koalakoala

You haven’t yet said if you have heating in that bathroom?

fenwick458

the fan currently fitted is 4" in line, around 25l/s max by design and probably useless with anything over 2m of ducting, I don't know why they are sold I don't think they are fit for purpose.
better types of fan would be the Manrose CFD200t (31l/s) or the MF100T (68l/s) which are both centrifugal.
you need to consider "make up air" into the room too, if you have a closed window and no gap under the door whilst showering, no air will enter the room and that fan won't extract any air