Lining paper on new plaster?

[Dougwindmill]

I have just had some damp treatment completed and now have lower half of wall with new plaster and upper half old plaster (that will need lining paper). I understand the need for a thinned non vinyl paint for the new plaster but if I put lining paper on the whole wall, will this prevent the lower half from drying correctly?

 

[confidentincompetent]

As long as new plaster is fully dry no worrries. Presume your going to line all of the walls, not just the old plaster? Might be an idea to put a coat of primer sealer (over new and old) (zinsser 123) to even up the whole walls. This will be a nice surface to line over.

Good luck

 

[Dougwindmill]

Thanks for reply, the problem as always with new plaster is when is it dry?
I had 2 coats (browning? and finishing) so it is probably 2 cm thick. The finishing coat is already beginning to look dry after 24 hours but the plasterer from the damp proof company said I should wait 12 months! before it was dried out...... other than a thinned coat of non vinyl matt emulsion.
This seems excessive to me. Of course if I put lining paper ad get a couple of cracks, I can always put over another lot of paper after.
any thoughts?

 

[confidentincompetent]

It's impossible to judge how long it might take to dry, usually when its all thje same colour its ok. But you have deep repairs so I agree with the plasterer. Your plaster is deep and a lot of water has to escape somewhere. If you paper over (even lining) you will quickly get black mould forming (even with anti fungicide) and paper falling off. So I would go along with plaster'ers advice and would mist coat all bare plaster with supermatt (permeable emulsion) and a thicker coat overall. On the other hand if you get a dehumidifier, heating on and windows open it might be ok in a couple of months but..dont know the extent of repairs.. Good luck.

 

[Richard C]

12 months would apply to a new house build where everything has been subject to a good soaking as part of the building process but for repairs, a full re-plaster (not just skim) in an existing property would probably be OK after 4-6 weeks. He may be playing safe but without knowing the extent of your damp problem he may well be right so I would go with that. Don’t be fooled by how “dry” it looks, it can still hold a lot of residual moisture. Why line it anyway, just use permeable emulsion as sugested, certainly for the time being.