Bathroom extractor fan help needed please!

[Fanhelpneeded]

I live in a long, narrow mid terraced house and the bathroom is right in the middle (no outside walls). It has no window. It does have an extractor fan but I don't think it's working right as I've left it running after a bath or shower and the room is still steamy 4 hours later.

After reading pigletjohn's excellent posts about extractor fans I'm considering replacing mine for one that actually works but can't see where it would actually put all the excess water, there being no outside wall for it to go through. Will it just damp it all in the loft and make even worse problems?

it must not vent into the loft

if it has no outside walls it must pass into a duct in the loft, and vent through the eaves or roof, or a gable wall if you have one. Making holes in roofs often encourages leaks.

Go up and see if there is already a duct. If it is made of flexible plastic hose, it will be better to replace it with a rigid pipe. This can be round or rectangular. Flop loft insulation over the duct to prevent it getting cold and filling with condensation.

the vent out of the eaves needs to poke through and be visible, so you can be sure steam is not blowing into the loft.

With a ducted loft extractor, you can get a good powerful, quiet one. If you get a 2-speed fan you can either see which speed suits you best, or have a pull-cord to speed it up during a shower. The fan is preferably mounted on a thick wooden or ply board that stands on some insulating material such as carpet underlay, to prevent vibrations being heard through the ceiling

Just hijacking to say a quick hello and thank you to PigletJohn. We consulted you about our domestic noise problem, and consequently we've had all the boards screwed down upstairs as you suggested, we've bought solid core internal doors that are being hung next week, and we're going to lay Acoustilay 15 upstairs to dull impact and airborne sound. It's not cheap doing all this, but it is a lot cheaper than moving because of the noise! And the old developer doors were knackered anyway tbh.