salts in walls

Hello,

We have found that the additive we put into the plaster for 2 rooms has not mixed thoroughly enough. Therefore we have found we have 4 patches which are still absorbing water from the air, which looks quite bad.

We do not have the time to remove the plaster really so had planned the following: Apply salt neutraliser to the area, use a polystyrene lining (to stop the temperature difference causing condensation) then apply a vinyl wall paper.

Would be very interested to hear of any suggestions that may be better than this.

Many thanks
Jo

I'd suggest trying the plastering or decorating forum

I'm not sure the polystyrene is necessary, just some kind of sealant.

Any admix put into mortar should be allowed to mix thoroughly. Did you mix by hand or in a mixer? As you say it's a bit late now anyway, but the best solution would have been to start again...... Depends what you're looking for really.... I don't know whether your plan will work, you can only give it a try and see.

Roughcaster.