treating,repainting damp

deano72_2

i had big damp patch appear on the wall due to leak on the roof..
anyway it got to point where mold appeared,iv cleaned the mold,will get the leak repaired,do i need to treat the patch before i repaint it..?

TroysMum

Firstly get the leak repaired asap. I would then get a dehumidifier to dry out the room including the damp area. i wouldnt bother with bitumatic emulsion, just dry out the patch throughly before repainting.

cattie

Either use a solution containing bleach or a specialist mould cleaner on the patch before you paint it. Also, before painting it you can use a specialist stain block to stop the damp stain showing through the emulsion, or a cheaper option is to paint the stain with a coat of white gloss before emulsioning it.

Do you know if the leak is from the roof, as it could be from the guttering, possibly needing repair or cleaning. A blocked gutter was the cause of a damp patch in my bedroom last year.

deano72_2

funny u should say that,as the gutter was blocked with leaves,but the wall the damp appears on is the end of the house (end terrace)where theres no gutteriing,but u never know,water works in mysterias ways.i did get up a ladder (bit dodgy tho)& inspected the the cement between the tiles & apex,looked ok but not perfect..pain in the a$$ tho as only decorated it in sept!

wehavethepower

I throughly recommend a product called "Damp Seal" by Thompsons I know you can get it at Homebase it's great for sealing brown stains and for covering black mould etc (once it's been treated with mould cleaner of course!)

nickj_2

if you've got some solvent based undercoat , you can use that instead of damp seal if the walls have dried out .