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Old 02-26-2012, 03:05 PM   #1
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Moldproofing? my basement.


Hey guys, I'm from Northeast Ohio, and in the summer time the humidity gets outrageous. We normally run a dehumidifier which keeps it from getting completely infested with mold. Anyways, I'm in the process of remodeling and re-waterproofing my basement, (which I don't have much experience in) and I'm pretty much just trying to get some tips on if there is anything I can do before I put the drywall up - that might help at least eliminate some % of the mold problem.

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Old 02-26-2012, 03:44 PM   #2
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Moldproofing? my basement.


If you have Central air, and there is enough air movement down there, you do not need a dehumidfier. If you have Central air, and there is not a cold air return, or air from the furnace to get cool dehumidified, or warm air in the winter, no matter what you do, that space will always be a problem.

The minute we put in two vents into our basement, after we got central air, the humidity and stale air problems went away. We have never had mold down there, but the humidity was always higher in the summer. It also meant going around and sealing leaks around the band and rim joists, along with insulating that space, and sealing over the single pane windows down there. It now stays at the same humidity level as the main living area, which is usually around 52%.

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Old 02-26-2012, 04:01 PM   #3
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Moldproofing? my basement.


I would check to make sure all of these things are addressed:

Eliminate water leaks into the basement, make sure the exterior grade is sloped away from the house, divert gutter downspouts away from the house, insulate exposed cold water pipes in the basement and other surfaces on which condensation forms in the basement, cover any uncovered sumps, apply a vapor barrier to the concrete floor slab and concrete foundation walls, provide as much natural sunlight/daylight into the basement with windows, divert the dryer exhaust to the exterior, install bottom plates of stud wall on vapor retarders, use treated lumber in stud walls, particularly for the bottom plates, provide adequate air conditioning and de-humidification. (to maintain a relative humidity of less than 60%)

In summary: Reduce the moisture sources and de-humidify.
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Old 02-26-2012, 04:24 PM   #4
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Moldproofing? my basement.


thanks guys. thats exactly the type of info i was looking for. i can already think of a few pipes that can be wrapped. my sump pump is also uncovered too. I'm doing some research now, I'm thinking about making my own cover.

I don't have central air, but now that you mention it, I think I'll be looking into getting a central air system. I don't know why, that never really crossed my mind, I just kinda got used to living without it I guess.
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Old 02-26-2012, 04:58 PM   #5
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Moldproofing? my basement.


The main culprit is the sump well, due to being uncovered. Get it covered and sealed, and majority of the issues will go away.
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Old 02-26-2012, 06:27 PM   #6
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Moldproofing? my basement.


2 thumbs up to house engineer! you hit the nail right on the head!
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Old 02-27-2012, 09:24 PM   #7
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Moldproofing? my basement.


I agree. All but the "treated" top plate or studs.....

Gary

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