Hi guys. I am doing up my bathroom and got rid of old tiles and wall paper. In doing so, not only the finishing plaster was not sound and therefore i had to remove nearly most of it but also i realized that a section of bonding plaster is not properly bond to the exterior brick wall. It is not come off however when i push it, there is some movement but as i said, only a small section. The house is an old house built in 1910 so the exterior walls are not insulated and because of that in winter there is quite a lot of condensation forming on the exterior wall. As i said the bathroom is tiny, so no way i can build a stud wall. Would it be ok to screw a sheet of plasterboard direct onto the exterior wall? Is there a specific plasterboard which helps reducing condensation which is suitable to screw straight onto the wall? Just for your info, the wall will be tiled up to the middle and painted from the middle to the ceiling. Thank you in advance for your help.
tiling surface not sound
- Thread starter dotto
- Start date
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If the original plaster is blown it should be removed. If your property is 1910 then the external walls will most likely be solid brick, can you confirm? If they are then it begs the question what is Bonding/finishing plaster (if that’s what you have) doing on your external walls! It’s not original, is completely unsuitable & is probably why it’s all now falling off. Solid external walls are prone to damp & sand/cement render & conventional modern plastering materials are not suitable. Duplex plaster board does have a foil backing but screwing any sort of plasterboard over the wall without curing damp or providing a vapour barrier & insulation will lead to cold spots, even more condensation & a festering mess behind the plasterboard. You need to prepare the wall correctly if your to avoid future problems, I would suggest you post/move this one to the Plastering Forum as there are one or two in there who I'm sure that will relish repling to it!
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