Hi,
I have recently painted a room (wall and ceiling) in white emulsion. The paint looks perfect, but after a day or two, yellow stains start to come through where there was an old partition and on the joins where the wall has been replastered.
It doesn't matter how many coats i use, as it always makes its way to the surface.
I have used a sealant paint which seems to have worked to lock the stain in. unfortunately you can now see where the sealant is used instead of the yellow, but at least it is the lesser of two evils.
Any ideas what may have caused the yellow, or how to avoid it, as I have another 4 rooms to do and don't fancy going through all this every time.
It is a victorian building that has been vacant for 12 years and not been decorated since the 70s.
Any help much appreciated.
I have recently painted a room (wall and ceiling) in white emulsion. The paint looks perfect, but after a day or two, yellow stains start to come through where there was an old partition and on the joins where the wall has been replastered.
It doesn't matter how many coats i use, as it always makes its way to the surface.
I have used a sealant paint which seems to have worked to lock the stain in. unfortunately you can now see where the sealant is used instead of the yellow, but at least it is the lesser of two evils.
Any ideas what may have caused the yellow, or how to avoid it, as I have another 4 rooms to do and don't fancy going through all this every time.
It is a victorian building that has been vacant for 12 years and not been decorated since the 70s.
Any help much appreciated.