For my son so dont know the extent of it, I use bleach on tiled walls however this is a place he rents and the mould is on plasterboard walls so would bleach cause an issue or is there anything better, they are probably painted as well. I have advised better air extracion or a dehumidifier once he clears it up.
We get patches of black mould on painted, plastered walls in areas of still air, like behind wardrobes etc. (In Cornwall; humidity always high; sea air!). SWMBO sprays it with bleach using a hand spray. But not neat, diluted to say one third or one quarter concentration. Can't see why plasterboard should be a problem.
The danger in using bleach on mould can be that it does not kill the stuff, but actually feeds it......the bleach lightens the mould giving the effect that it's been removed - it's the cloth and scrubbing which really does th at - but it'll more than likely be back, and well fed. Use white vinegar, k ills mould, no problem. Insulate, ventilate, provide air circulation, backg round warmth and remove the source of the moisture. Good luck.
Bleaching would cause salt buildup. I'd use something like zinc sulphate or copper instead. Well, I'd probably use a dehumidifier if fixing the root of it were impractical. That alone usually stops it.
NT
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