Richard yes i have plastered a few times before
Just wanted to be sure you knew exactly what you were taking on, especially ceilings.
but never in a bathroom where is pronned to alot of condensation.
Condensation is primarily caused through a lack of ventilation, additional insulation probably wont cure that if you have a problem.
I will be using cement based adhesive as i find this is alot better.
If you use cement addy over gypsum plaster/boards then prime with an acrylic tile primer.
I was thinking about using MR P/B for just around the bath where there will be alot of ater splashing the tiles.
I would not use MR board in a wet area unless it’s tanked; use waterproof tile backer boards.
So do you recommend i use MR boards for ceiling also?
No basic Gyproc board (duplex or otherwise) will be fine as long as it’s skimmed.
i will be fitting extractor vent above the bath.
An extractor vent! do you mean an extractor fan? A fan is what you need (& it’s a BR requirement on new bath/shower rooms) but electrical work in a bath/shower/kitchen room must be undertaken by a Part P spark or notified; you can DIY but you must notify LABC & it’s not worth the hassle.
My bathroom has a cavity which has been filling with insullation years ago with the old wool type. Main reason for using duplex is to retrain that extra bit of heat also the cost comes into it, they work out only a few ££ more than the usual plasterboard.
With what you currently have, you will gain virtually nothing with regard to heat loss; I suspect your condensation problem is caused by lack of ventilation. Duplex is just ordinary PB & using this in a bath/shower room can have big disadvantages.
Hi again just ordered mr boards from local builders for ceiling, should i prime these with anything before skimming?
I never advised you to use MR board on the ceiling; basic Gyproc board (duplex or otherwise) will be fine as long as it’s skimmed; I was talking about the walls. If you’ve MR board now then you will need to prime before skimming; Thistle Bond it or, at a push, PVA with sand in it.
Will also use these around wet areas. Should i tank these before tiling? Thx again
If you use MR in wet areas I advise you to tank; much better use waterproof tile backer boards.
i had a phone convo with bg the other week to clarify some matters about mr boards to which they stated that your defeating the object if you skim mr boards, as any gypsum plaster used in the bathroom has to be sealed with a good paint, therefore if your going to skim you might as well use normal boards as the boards are going to be skimmed and sealed anyway and skimming mr boards means priming with bond it or similar
Right; I never advised using MR boards for the ceiling (see above reply to OP); I obviously didn’t make this clear. If you’re going to fully tile use MR boards without skim & tile directly; if you skim (any boards) you reduce the maximum tile weight to 20 kg/sqm including addy & with today’s tendency for large format tiles that could be a problem. If you want ½ tiled use MR board, prime & skim the area that’s not being tiled, wasting the skim just inside the tile area, best of both worlds. In wet areas use a waterproof tile backer board & tile directly over that.
so many different opinions gets confussing in the end lol.
I’m sorry that you seem to be getting confusing answers; they are well intended but your thread is going at breakneck speed. I would advise you to slow down, take in what you’ve been told already & do some more research of your own; then come back & ask questions if you need to.
I do only renovation work; plastering (both skim & proper), bath/shower/kitchen refurbs/refits, including drainage & general building works; the advice I give you is based on this.
