How to remove wet marks on the wall

jimbo83

Hi All

I have noticed that some wet looking patches have appeared in my house. One is on the wall near my front door and one is a bigger one in my dining room.

I live in a 150 year old terraced house and I'm wondering what is causing this. I have assumed it is condensation causing the small patches near the door an either condensation/a leak next door causing the larger one in the dining room.

How can I get rid of these? Can I use a hairdryer to dry them out for example?

Thanks

Chunks

Easier said than done but the problem that gives rise to the damp patches needs to be investigated and cured. Once that's done the damp will dry out naturally or you can accelerate the process... I used one of those 'oxy' cleaning products to get rid of water stains incidentally - worked well.

Do you know what room in your neighbour's house is on the other side of your wall? They may have had an issue that's now fixed or they may not know they have a problem.

evoke

You need to trace the source of the damp patches and deal with that first.

Once the source has been dealt with, you need to dry the damp patches thoroughly - this could mean hiring heavy duty room heaters and leaving them on for a few days.

You then treat the patches with a stain block spray (e.g. Polycell Stain Stop White spray). This will stop the water mark from bleeding through any new paint.

Finally, redecorate the affected surfaces by painting them.

nickj_2

check gutters and downpipes for blockages/leaks , look on the outside for obvious signs , eg , green /black algae/mould , crack in brickwork/ rendering etc