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Terry in IN
10-25-2002 20:19:12
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Re: Re: Re: shop floor in reply to larry, 10-21-2002 16:28:33
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Sounds like your moisture may not necessarily be coming up through concrete. I have years of experience in aircraft hangers. Each and every spring, when we shut down the heating system, the coolness of the ground cools down the floor. Upon opening the hanger doors in the morningc, the otherwise dry floors become soaked. This is due to the condensation of the warm moist air onto the cold slab. No surface material short of some kind of insulation will change this. As summer ensues, it becomes less of a problem as the ground warms up. Keeping the doors closed to keep out the moist air will help, though this is not always possible. The ideal way is to pour your floor with in the floor heat, if only to use during the warm-up. We currently have a waste-oil furnace, and keep the heat on longer, speeding up the warm-up of the floor. The trade off here is that we give up the coolness we enjoy in the early summer at least till 10:00 AM with the doors closed. Having warmed the floor up some time earlier in the season than we used to compromises this benefit some. A simple test would be to lay a rubber floor mat on the floor. When you notice moisture, lift the mat and see if the floor is wet underneath (darker under the mat), or the moisture in on the top of the mat (floor will be lighter under the mat). Oh, I have one hanger coated with very expensive epoxy, and the other coated with a cheaper polyurethane coating. The epoxy shines and will land you on your butt when it "sweats". It also agonizes me when a carless person nicks or gouges it. It will be difficlult to repair due to it's shine and durability. The polyurethane stands abuse reasonably, and will be much easier to repair. Less shine, less slippery, less critical if spot repaired. It still looks nice for a shop.
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