Damp on single skin extension

[pearl1]

Hi, any advice would be great...... I want to eliminate the damp in my toilet/utility which has a single skin wall. I also want to insulate the walls maybe with celotex batonned against the walls, then boarded with the insulated palsterboard. I am best hacking the old plaster off, apply a render water proof coat, then baton, insulate and then board???

Cheers

 

[rhysrod]

Single skin walls are going to be hard to keep dry but i think i would render it with water proofer then paint some sandtex or weathersheild paint on . Then batten celotex then ur plasterboard. You could put up some plastic vapor barrier after you put up your insulation.

 

[pearl1]

cheers... would that be membrane like they put down for damp course??

 

[rhysrod]

similar just alot thiner . its clear in coulor. if you say vapour barrier for walls they should know what ur after at a builders merchant.