I had condensation on my wall I let it dry but it stained I painted over it but the stain showed through?

Question

The condensation left a stain on the wall which has wallpaper on it.
I don't want to strip off the wallpaper as the room is big and I reall =y cant paint it all again but the stain showed through when ipainted over it what shall i do?

Answer 1

luck for you i'm a painter & decotator, firstly you need to buy oil based undercoat,you'll prob need 2 and a half ltrs. and use a roller to aplly it's alot quicker unless it's only a wee bit in the corner then use a brush.let it dry which will take between 2 - 5 hours then you can paint over with emulsion and if that don't work all do it for u for free!!!

Answer 2

You can use a product called Killz or similar stain sealer (these are strong smelling paints and good ventilation is a must). These types of sealers are used frequently in homes after smoke/fire damage.

However, you may have a bigger problem. If this area was wet for a prolonged period of time, you may have mold developing in or behind the drywall. This can be a health hazard and you should consider removing a small piece of drywall (2"x2") in the stain area to make sure you don't have mold. Check behind the drywall and the piece of drywall itself.

If you have mold (which is nothing to mess with, especially if you have elderly people in the house or very young children), you may want to consider replacing the drywall in the affected areas and treating the mold with a bleach solution to kill it. This is up to you. If you are not concerned then sealing the drywall and just painting it is an option.

Answer 3

Give the stain a light sand, as you sand the rest of the wall. Then just role over that one area to see if it bleeds through. If it comes through, use "Zinzer" in a blue tin as a stain blocker. £10 for 1 lt tin. If stain does not bleed through, save your money and finish off painting. But I suggest you repaint over the whole wall to avoid seeing the dry line of the experimental area. Good luck

Answer 4

No problem - buy a tin of PVA from paint shop mix 1 part pva with 5 parts water paint it over stain let it dry - paint over another time let it dry - now paint over the stain with an OIL BASED PAINT let it dry - now you can paint area with original colour and you will never see the stain again i promise!!!!

Answer 5

You can get a stain block in an aerosol or apply by brush.
Will take a few coats depending on severity of the stain.
The easiest way is to touch up with oil based undercoat, will only take one coat.

Answer 6

Use stain block spray the best one,couple of coats (drys quicker than paint on).

Answer 7

You might see if you can ventilate the room, this should attack the cause. Perhaps using a kitchen/bathroom paint, as they're made with condensation in mind.

Answer 8

did you let it dry out properly? my Dad is a decorator, go over the damp part with gloss, let this dry then paint over the gloss with your emulsion or whatever paint, it should be fine then, the gloss seals the stain , we,ve had a couple of small leaks over the years and my dad has always done this, its always worked, make sure you let the paint dry!

Answer 9

you should try painting it over with white undercoat first - then repaint the original colour or try some pva - its like a glue paint it over the stain and a 2 inch overlap then repaint after it has dried

Answer 10

I think they make a sealer type paint, I not real positive. Ask at the paint store and see what they say.