If paint did not get a chance to cure properly before it was exposed to moisture these soaps can leach out.
My bathroom walls sweat paint.
If possible let the paint dry for a couple of days before taking a hot shower.
Don t use any chemicals.
Place a dehumidifier in the areas with the most wall condensation.
You may not have heard the term surfactant leaching but you may have seen it in the form of brown spots growing like big moles on painted surfaces.
Those drip mark lines on your bathroom walls do exist.
What can you do to fix the problem.
A true exhaust fan vents the warm and moist air from the bathroom.
Crank up the heating system or if not available hire places generally hire out industrial heaters.
It can usually be washed off but tends to come back.
It is more likely that you are dealing with a paint surfactant issue.
The best way to to make sure your walls are streak free are 1 use the highest grade paint possible for your bathrooms don t go cheap ie.
Benjamin moore aura bath spa or 2 use an antibacterial microfiber cleaning cloth dipped in warm water.
To get rid of mould first kill it with a brush on solution containing biocide which you can get from diy hardware stores.
Quite often one would paint a bathroom and take a shower the next morning causing this issue.
Next repaint the walls using a fungicide paint recommended for bathrooms.
Start painting in the corners and work your way across the walls.
You re not imagining things.
If the paint sweating is occurring on a regular basis in the bathroom areas it is a good idea to check if the exhaust.
But whatever they feel like they don t look good on a beautifully painted wall or ceiling.
How to stop the walls from sweating in an old house step 1.
If you have several areas particularly on.
Ventilation is your friend when it comes to long.
Install an exhaust fan in your bathroom.
These spots can have a sticky glossy or soapy feel.
Ensure the area has adequate ventilation.