If the temperature of the floor is below the dew point, then it will sweat. Maybe there's a cold wind blowing underneath the gap? --Jakob

-----Original Message----- Date: Tue, 10 Nov 2015 17:25:04 -0600 From: "Lorell Hathcock" <lorell@hathcock.org>

It is on the ground floor, but it is in a hut that has a wood floor that is raised off the ground. There is a gap between the bottom of the floor and the ground.

-----Original Message----- From: Valdis.Kletnieks@vt.edu [mailto:Valdis.Kletnieks@vt.edu] Sent: Tuesday, November 10, 2015 5:13 PM To: Lorell Hathcock <lorell@hathcock.org> Cc: 'NANOG list' <nanog@nanog.org> Subject: Re: Environmental Graph Interpretation

On Tue, 10 Nov 2015 16:48:04 -0600, "Lorell Hathcock" said:

...

Are there any one the list that would care to take a look at some graphs of temperature, relative humidity and dew point that I have for two locations. In one of the two locations, I'm having a problem with the floor getting wet (condensation?). At the other everything is just fine.

Is your moisture problem on a ground floor? Note that even well-cured concrete is like 30% water, and can allow moisture to slowly migrate through and weep. Usual cure is application of a proper sealant over the concrete.