Bathroom ceiling job

[Jobba]

Hi all,

Some advice please? Hope this is the right area?

Got a flat roof ,one story small bathroom, built as extension in 1980. The roof was felt and was leaking, so had a new roof on.

When electrician came to quote on the humidistat fitting, and while at it new downlighting, he said he'd have to take most of the ceiling down to get access to light , make a switch outside the bathroom door etc (bathroom is only about the width of a bath, and length of a bath). Fair enough.

So he said to go out and get my own plasterboard and he would attach after removing old ceiling, and fitting the lights and humidistat, and then told me to get a plasterer to come and skim and finish.

Questions...

1) So, if I wanted to prevent damp and condensation in future, and do a good job (as well as using humidistat ), what ceiling plasterboard should I get and would things like upvc panels be a good idea , like tongue and groove ? Any tips to do the job right? I dont really know anything about this kind of thing.

2) And finally how do you finish a job like that and make it look good?Do you have cornices, strips etc? Would a plasterer be needed if using panels , or should I have it skimmed? And what kind of trade person would I get in to do it?

3) How would the electrician be able to leave the lights so that the final job looked good after skimming and/or panels?

Any thoughts appreciated, thank you.

 

[Wayners]

1980s I doubt there is any insulation above.
If roof wood sheets were replaced when felted then a lot of debris would off fallen and been left by roofers in most cases
For the record.
I've never seen one roofer bother to clean debris in 40+ years so I got saddled with the disposable of felt and wood scattered around.
Not much I guess but used to annoy me!
If you insulate the ceiling well, that will eliminate condensation forming on surface and future problems like paint peeling and mould.
Pull ceiling down.
Get electrician to run wires.
King span 50mm or thicker if you have depth.
Plasterboard over or even better insulated plasterboard over the entire ceiling dropping cables through as you go and plaster skim.
Now the problem.
Down lights.
Insulated plasterboard takes some planning and doing properly or you can have problems fitting downlights as it will break the insulation and vapour barrier.
You will need to discuss this with electrician.

Other way is ram ceiling void with rock wool and when you board use foil backed plasterboard and drop cables through plasterboard.
Cut holes for down lights.
Push cables back up through hole.
Skim ceiling.
Paint
Get lights fitted.

 

[Jobba]

@Wayners ...massive thanks for that clear write up , that will def see me right.

Only question, what does "King span 50mm or thicker if you have depth.' mean ?

And I have been looking and seen moisture board and vapor backed board....any difference between them if I get the space properly insulated? I see that one is a bit heavier than the others and they are both heavier than regular plasterboard. You mention the problems when doing lights...should I just go regular plasterboard and then use decent peel stop and decent paint?

And I like that last suggestion , but it would mean doing without lights until ceiling skimmed? Or am I missing something?

Thanks once again