Extractor fan into loft space, problem?

Vix123, bathroom fans should wherever possible be ducted to the outside taking the shortest possible route. In most cases this is directly through the wall, where an outdoor grille is fitted. You are right to be concerned, as your fan is simply moving the humid air from the bathroom to the cold loft, where it is condesnsing and this is not likely to be doing your roof joists any good at all. Where fans have to be ducted up into the loft, there should be a 100mm flexible duct run from the van all the wall to the either the soffit (under the gutter or to some form of exit point out of the roof, e.g. through the tiles. It sounds like you hired a cowboy on this occasion. Did you get an electrical certificate for the work? and was the completed fan installation notified to your local authority under part P of the building regulations? Only if the work has not been notified, then its been done illegally and you could face a fine of up to £5000. Householders must ensure that they only hire competent electricians who can prove that they are members of one of the three goverment approved Part P schemes; e.g. NICEIC, etc. Click on the link below for more information on part p of the building regulations; http://www.planningportal.gov.uk/uploads/br/electrical_safety.pdf Unfortuantely it maybe the case that you will have to pay to get a part P registered electrician in and refit the fan properly and issue you with all the correct paperwork.