Drylining help? - Drylining our utility room

[Dave_L]

Got a week off work this week, got a fair bit to do...

First job is to dryline the utility room. Single skin brick wall construction with flat roof. Ceiling panels removed for access for rewire job.

Need to insulate and line ceiling then the walls - I have 25mm Celotex and 25mm batten - i was thinking of battening to the walls and then fixing in the Celotex in between, then screwing 12.5mm V Grooved plasterboard to the batten, then taping and filling the joints to arrive at a finish that can then be painted.

Ceiling I have 50mm Celotex and will then screw to the timbers after carefully marking it out.

It's only a utility room/laundry area/decontamination area when I get home from work(!!) so it hasn't got to be 100% like it would have to be indoors.

Not much experience with this, am I doing it right?

[seanandruby]

I would say the single skin wall needs upgrading to a cavity wall berore boarding etc; you can add another skin to the inside. if not you could be patw. :;):

[Dave_L]

But that would make the room too small - there simply isn't space to do that. I know it ain't ideal.

[seanandruby]

What about applying celotex outside and rendering it? then on the inside put damp course then battens to dub it out? i know its not ideal but if you are willing to live with it :;):

[lutonlagerlout]

its not right dave but it will be ok
make sure you wear a mask when you cut the celotex,the particles are very very irritating, we wear boiler suits and masks when we have to cut it
good luck mate
LLL

[Dave_L]

What about applying celotex outside and rendering it? then on the inside put damp course then battens to dub it out? i know its not ideal but if you are willing to live with it :;):

Can't do that either - as the big exterior section of the wall is pretty much inaccessible.

Thanks for your input

[ski]

I think what you are doing is fine, you may be better with 50mm battens and 50mm celotex for a bit more insulation. Use duplex plasterboard (foil backed) and make sure you have adequate ventilation if theres much moisture (you said utility room). I always prefer a skim coat to dry lining, especially in this type of room, and if you were thinking tiling after you definitely want to skim coat or use a waterproof baker board.

[Dave_L]

Thanks Ski - but I already have the Celotex and the batten - I know I could double it up to achieve 50mm, but that means more expense!

Not much moisture out there, just a washing machine. All exterior walls have been treated with Thompsons Water Seal.