Does anyone know of any problems with tiling over walls with condensation problems, its not rising damp but the bathroom has 2 external walls and a crappy extractor fan.
I think you need to find out why you have condensation & cure the cause of that first. Lack of ventillation/insulation is usually the cause but may depend on the age of your property & possibly your life style. Installing a decent extractor fan might be a good place to start & insulated PB may work but it depends what’s causing the problem! If you have solid external walls then it may not be so simple.
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