Kitchen Ceiling Plasterboard

[moraz]

Hi DIY gurus,

I need to replace my old plasterboard ceiling in my kitchen and install a new one. Above the ceiling there's a flat roof and the plasterboard will be attached directly to the wooden joists. My problem is that I've received so many different advices to what materials I need to buy that I have no idea who is right.

Some say to use normal plasterboard, other said to use moisture resistance, others fire prove and the rest suggested to you the one that have foil on top. Some said to skim it while others said I shouldn't. Some said to nail it others to screw. Some say to paint it with high opacity paint and others with Matt.

I thought this should be a straight forward and was hoping you guys can tell me what is the best practice for installing plasterboard in a kitchen ceiling

Most appreciated!

 

[PrenticeBoyofDerry]

If the ceiling goes directly to external environment via joists.
Then insulated between joists, leave a 50mm gap for ventilation, you could then either manually fit a vapour check barrier and standard 12.5mm plasterboards or use the duplex (foil backed boards)

No reason to fireproof as there is nothing above to protect from the spread of fire, no need to use moisture resistant boards.

Do not nail, use drywall screws spaced at about every 150mm-200mm.
And finish of with a plaster finish, it is possible to use the joint-filled tape method and spot the screwheads, but conventional plastered finished surface is much better and there are no benefits regarding time and cost in joint-filled tape method.

With regards to painting, just use a good quality paint, but prime new plaster with a mist coat before hand.

 

[moraz]

Brilliant reply, thank you!

I really want to put insulation as you've suggested but I've read that cold roof insulation can cause condensation issues if I don't have enough ventilation and I should only fit it if I have ventilation from opposite sides.

I only have one side ventilation and I think that it is a bit weird as it is basically a gap between the roof and the wall which is covered with felt but allows some air to go through from the bottom as shown in the attached images.

Will it be better NOT to fit insulation with a single side ventilation and the current setup and if so what plasterboard should I use?


Many many thanks!!

Untitled

• moraz
• 1 Aug 2014
• 1

Untitled

• moraz
• 1 Aug 2014
• 1