How do you get rid of mold on painted walls? I scrub it off but a black stain is left. How can you get rid of this? Also, the mold is back within the week any ideas on how to stop it?
Elaine from England
Painting over the mold or cleaning it will do absolutely no good if the mold started underneath the wall. You might have mold growing underneath in the insulation. If this is the case, you need to get the damage fixed fast before it spreads further. If it happens to be that toxic black mold, your health is at stake too. (01/24/2005)
Try using Tilex. It works wonders on mold and mildew. I wouldn't be without it. (01/24/2005)
The product that we use is called Kilz. It works wonders. You can but it at paint stores. (01/24/2005)
Mould grows where there is moisture so the "cure" is to prevent the moisture collecting and condensing on walls and creating the environment where mould spores can settle and breed. If its at the bottom of a wall it may be rising damp, because of an ineffective or breached damp proof course, (often flower beds built up outside the wall allow damp to seep in above the damp proof course). In this case, to prevent the mould you need to repair the damp proof course, (expensive), or remove the structure that is allowing the moisture to bypass it.
In cooler damp climates like Britain the atmosphere is often laden with moisture and this can be compounded by the moisture produced within the house from the kitchen, bathroom and given off from the breath and skin of human bodies. The answer here is to increase ventilation, whether through opening windows and doors, especially after bathing or showering, or have an extractor fan installed. Raising the internal temperature of bathrooms while showering to heat the walls slightly will also prevent the moisture suspended in the air from condensing out when it hits the cooler surface of the wall. But you must then ventilate to remove it from the house.
A bleach solution, (as directed on the bottle), should remove the mould, kill the spores and whiten/lighten the stain. It will recur unless you sort out the ventilation problem, even if you paint over the stain, although some paints have a built in fungicide to discourage mould growth.
By Jo B.
Sorry, folks but that's some serious misinformation. Killz does not kill mold. Even bleach only has a temporary effect if you don't fix the mold-growing conditions. You need to kill the mold with an EPA registered fungicide/mildicide (mold killer), remove any porous materials that have mold deep within them (carpet, sheetrock, insulation), and maybe most importantly you need to fix the source of water or humidity that contributed to the mold forming. Fungicide or lack of moisture can kill the mold, but even dead mold spores left in the area can trigger allergies. Again, if the wall is wet from within, just killing, wiping, or painting over it will not fix the problem. It will grow back, and could spread. (05/11/2007)
A great product that I've found is MoldZyme. It's EPA approved and removes the mold. It's non toxic. Check it out.
The mold is behind your walls or wallboard. I had a whole room that was totally infested with mold. This was because when I bought this place, the previous owners had built a "sun porch" onto my mobile home with "no" window sills and because the windows were huge "single" paned, the windows constantly sweated (over a quart a day). Thus, all of that water was dripping behind the walls, all day, every day, over the course of many years. I thought I would have to tear the small addition down because the mold was everywhere along the bottom 2 feet and all around 3/4 of the room, until I did the following.
Here's what worked for me: (and yes, I know bleach is toxic, but this needed to be done with something that was strong.)
This may sound like quite a hassle and to tell the truth it was, but, believe me, I couldn't even use that room except in the summer due to the heavy amount of mold and it's nasty smell. Now, that I've sealed the walls I can use that room and I just love it.
My "sun-porch" turned "craft room" is totally made of plywood, the wood held up to all the bleaching. Wallboard may act differently. (06/15/2007)
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