Mildew Problem


Old 06-07-04, 05:00 PM
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Mildew Problem

I have to neighbors that have decks about a foot off the ground and completed enclosed underneath. They have a very bad mildew problem.
Trying to find out if anyone has any advise to controll this problem. I have been told to use 1 part bleach and 3 parts water to kill mildew, but other tell me that bleach on a deck is bad? Also, with no ventillation underneath, could this be the reson mildew is growing? Any one have any suggestions. I live in Michigan, so I know the weather is not my friend here.
Old 06-07-04, 11:01 PM
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The reason for the mildew is the lack of ventilation. The ground never has a chance to dry out, therefore the deck is always going to have a very high moisture content. Using bleach to kill the mildew will do just that, but it's going to bleach out the deck boards as well. And, until you cure the ventilation problem, the mildew will just keep coming back.
Old 06-08-04, 04:38 AM
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Thanks for the info. This is what i thought would have to happen.
Old 06-08-04, 04:53 AM
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An oxygenated bleach is much less harsh on the wood and will also kill mildew.

But, as Lefty said, moisture and lack of bright uv sunshine is where mildew likes to live. Some quality stains do have mildew retardants.


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