Reply by johnstoneb

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Posted on condensation in my new storage steel shed/garage sized

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2915 posts in 2172 days

#1 posted 02-25-2013 04:17 PM

moisture condenses on a surface when that surface is colder than the air carrying the moisture. You need to ventilate the building and move the moisture laden air out or remove the source of the moisture. What is the moisture content of the lumber that is in the building? Before spending money on a paint that I don’t think will do anything try ventilating the building. Set a fan up to move the air through the building. You’ll need a vent on the far side of the building. so the air can move through. The polystyrene might reduce the condensation. I your climate is pretty humid. If the ventilation doesn’t work you might have to set up a dehumidifier.
you post sound like you want to eventually use this space for a shop. Insulation on the ceiling will just move the probelm to the walls. You will need to insulate fully and apply a good vapor barrier before finishing the interior walls.

-- Bruce, Boise, ID

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