I've split what was a large bathroom into 1 small bathroom and 1 small bedroom. Patches of Mould have appeared on the sloping ceiling in the small bedroom of this terrace house.

The partition wall I put up has been insulated, but should there be some sort of special waterproofing procedure I missed out being a novice?

Having read some of the other cases on this forum, it sounds like the first thing I need to install an extractor fan in the bathroom, and perhaps some insulation in the sloping roof in the back bedroom? But would this be sufficient to stop the condensation/damp coming through? I'm sure there must be some other sealant.

Any help would be much appreciated.

Thanks,

David.

did you use moisture resistant plasterboard?

_________________
- Dave
http://www.pamperhouse.net
http://www.invertedcircle.co.uk

Hi, thanks for your response.

No, I wasn't even aware there was such a thing. I'll be adding that to the list of stuff I need to buy in order to job correctly.

I don't think that the moisture resisitant plasterboard and the extractor fan will solve the problem. As the condensation is coming in at the top of the wall, where it meets the ceiling, which is sloping. Is there any sealant that I should be using?

Also, not all bathrooms have extractor fans in them, and they don't seem to suffer from condensation problems. Why is this?

David.

http://www.ultimatehandyman.co.uk/damp/condensation.htm

condensation is usually a result of poor ventilation and insulation....

Can you take a picture of the partition wall?

_________________
- Dave
http://www.pamperhouse.net
http://www.invertedcircle.co.uk

Thanks again for your response. I'll see what I can do with regard to a picture.

The condensation in the small bedroom may just be, because the room is small.
Does the person using it leave the door open at all times?
If the door is closed and there is no ventilation, then the water vapour produced while in the room will settle on the nearest cold surface, that may well be the ceiling.
Is there condensation on the bedroom window?
Is the ceiling insulated? If it is insulated, with what? And how thick?

Is the bathroom door kept closed? Is the extractor fan run on a timer? Or a humidistat? Or both?
Is the fan run for at least 20 minutes after running hot water?
Is the water vapour in the bathroom merely travelling through the bathroom door and into the bedroom?