Glossy side, you got no chance, other side maybe possibble, but I don't think it would last, as the hardboard contracts it will fall off.
The hardboard would expand lots when dampened by the skim coat, and then contract afterwards. Do you like a 'crackle' finish?
Cheers guys, would it make any difference, if it was all nailed , say 300mm apart , with annular ring nails ?
Gatt. Even if nailed as you suggest, the hardboard would bow out between each fixing - sorry, it just isn't suitable, and I doubt very very much you'd have any success with doing this. Perhaps possibly maybe if you were to coat it first with waterproof PVA or similar, but still a chance I personally wouldn;t dream of taking - and I'm the biggest cowboy out there. Plasterboard is the obvious way to go.
I'm not doing the skimming, , I'm doing the doors and floors . It's a house I'm working in , don't think the young couple, can afford to get the whole house sheeted with plasterboard, and replace all skirtings and facings . Plasterer coming tonight to see it . Cheers guys for your advice.
I'd have thought a more successful (and cheaper) solution would be to line-paper the h'board and that should make it pretty much ready for paint. If the plasterer reckons he can make this work, perhaps a written assurance from him would be useful - so the folks can make a claim if it doesn't.
No self respecting plasterer would ever consider skimming over any wood sheet material. it will not last.
All good DA , thanks . Plasterer is doing the solid brick walls. All you guys were right, he wouldn't touch the hardboard one's , thanks again . Plus side for me , I get to sheet, some of the walls and a ceiling. Result all round