Drywall – Getting rid of mold in areas you cannot reach

basementcleaningdrywallmoldwood

I used a home mold test kit (leftover from my previous question) to see if I had mold in my basement (where I sleep). Turns out a little bit of mold is growing in the petri dish. The mold looks to be greenish in color, almost a green-white. It also looks a bit fuzzy. I looked around and cannot find any source of it, so I figured I would clean all of the wood beams, insulation, and walls as well as run a dehumidifier and air purifier (with HEPA filter) to get rid of and prevent the mold. The biggest issue is that there is one part of the ceiling that is drywalled, and a part that isnt (the main cable line as well as water lines needed to be accessible)

I was considering just spraying some vinegar behind the drywalled section because I cannot reach behind there to scrub, nor can I see all that well to target specific sections should I see mold. I figured the vinegar would kill the mold even without scrubbing, and the dehumidifier would prevent the spores (which apparently cannot "die"?) from spawning new colonies.

Is this an effective plan? Or will the vinegar add moisture to the drywall/wood studs and actually feed the mold? Is there a more effective way to treat the mold and prevent it in the room?

PS: the room as only a small basement window and cannot be opened, so air flow is poor, so I am trying to avoid bleach/ammonia. Plus I heard they cannot penetrate porous surfaces anyway

Best Answer

Although Vinigar is a weak acid it can kill surface mold. I would recommend hydrogen peroxide at 3% it is more effective at killing mold and bacteria and doesn't stink after application. I would also spray the exposed wood surfaces, when lumber is milled it is sprayed with a biocide that doesn't last long and I have seen older units start to grow mushrooms in just a few months. And ply wood is worse when the sheets of veneer are cut mushrooms begin growing in days. Most spores are killed in the hot press process. Keeping the basement dry with a dehumidifier will be the best plan forward without moisture it cannot grow. But make sure to treat the exposed wood because you sleeping in that area create a large amount of exhaled moisture that may be enough to activate the mold.