Our roof was reshingled about six years ago. This had to be done before we could buy our 1970’s built house. The subroof was all rotten and had to be replaced also. They installed a few soffit vents and added another layer of insulation. I noticed a wet spot on our ceiling and went into the attic to look. The OSB that was replaced is wet and starting to mildew. I know that I’m going to have to replace the insulation and add more vents. My question is…once the OSB dries is there a product that I can spray on it to stop the mildewing? I don’t want to have to replace the whole roof again. I live in Maine so I’ll have to wait until summer. Thank You.
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There is another issue that is causing your moisture started mold problem. Someway, warm moist air is making its way up into the attic. Can light, open holes in wall plates, unblocked stud spaces from crawl/basement to attic or bath vent fans (or kitchen exhaust fans). You take care of the cause and you won't have to worry about the results.............or your sealing of the sheeting might be worth it.
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Remodeling Contractor just outside the Glass City.
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Guess what - it might be even more humid in the summer! You need to figure out why moisture from the house is getting into the attic and correct that right off.
The boracare line of products has various treatments with Borates that prevent fungii from growing, but in a continually dampened environment, you will be fighting a losing battle.
I live in Midcoast region of Maine.
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You said the osb was wet. I assume the bsb sheathing on the roof? Is it wet all over or just in onw spot? Could be a roof leak also.
You need to find out where the water is coming from. Go to DOE online and find a local energy star rater and have them do an energy audit with a blower door. YOur house is probably leaking warm moist air up into your attic (that you paid to make warm) and it is condensing on the underside of your roof deck. Seal up that leak and you'll dry out the roof decking, stop the mold and save money on fuel to boot! More than enough to pay for the blower door test. (I pay $800 to 900 here in NC for Blower door, duct blaster and energy star program)
Edited 2/28/2007 11:11 pm ET by ShelterNerd
http://www.traskresearch.com
The answer to your question is 'yes' - the chemical is DBAC (diethyl benzl ammonium chloride) - follow all precautions. The fogger is well worth it.
Jeff
See the message above. That's the second new gunner name I've seen this week.http://logancustomcopper.com
http://grantlogan.net/
It's like the whole world's walking pretty and you can't find no room to move. - the Boss
I married my cousin in Arkansas - I married two more when I got to Utah. - the Gourds
Hmm. I always thought it was a cool name.
USMC 1971-1994 started out as a 0331/Machinegunner. Hence the name gunner.