bathroom fan/light

[jonnyp1]

i am in process of putting in new shower room in cupboard. electrician let me down and 1 made rash promise to be finished for xmas so seeing if i can do my self.
i have existing light in room on rose with switch inside, wondered if i could just change switch to pull cord from ceiling and take off rose in roof to one of those in line fans and lights (like from screwfix) or do i need another power feed. can i also run a couple of spots off rose?? i realise all this electrical but put here becasue my second problem is venting the fan in the roof void. the building is very old with a very strange roof which means i cannot run ducting to soffit and wall is 2 ft thick stone. i wondered if i could connect duct into toilet stack vent which is very close? any issues smell etc???
cheers jon

 

[mikric]

not sure about electrical side of things but the dont even think about conecting a extractor to svp mate what sort of roof tile or is it slate have you got ? you can get purpose made or universal tiles just for this job.

 

[jonnyp1]

they appear to be pretty standard concrete tiles. is there anyway i can fit this through roof from inside as roof is 4 storeys and i dont have ladder long enough? cheers jon
as matter of interest why not into vent for toilet as air flow will be away from shower?

 

[mikric]

would need to be done from outside . with a view to connecting to svp why do you think your wc has a u bend , can you imagine the smell if not, to connect to it with a vent would be the same thing, but in your shower . 2 foot thick walls and 4 storeys high do you live in a castle by chance