Humidity issues

[cowboysteve56]

I live in east Texas and very humid condition.I had a 30×40 pole barn built on a concrete foundation.I had closed cell spray foam insulation installed.My problem now is mainly on one end of the building,I have water but not much.I am in the process of installing a mini split unit with a dehumidifier but I really don't think it's going to fix my problem.I had opened my 7 foot roll.up and kept my door and windows open with a small fan at the door.It did not fix the problem.I know they have a vapor barrier under the slab.I have no clue.Im thinking about putting a sealer down.Any help would be great.

 

[dcg9381]

In TX. It's humid. There's a reason why many homes in TX that are spray foam don't need ERVs or HRVs:
That reason is we're running the AC pretty much full time, which dehumidifies.

It's just as humid in my spray-foam insulated shop inside as it is outside (eventually) unless I'm running the AC. Leaky *** roll-up doors don't help.

What exactly is the "have water issue" - is it coming up through the slab? That's different. Photos are helpful.

 

[545_days]

Is the issue that the concrete was cold and a warm front of humid air rolled in? When that happens the only way to stop sweating is to close the doors to keep the moist air from getting to the concrete.

The parking garage at work was sweating like crazy earlier this week for that reason. After a couple of days the concrete warmed up and everything has dried out.

 

[carlaisle]

What is the source of this unwelcome water? Are we talking about condensation, is there a hole in your roof, ___________?

 

[BurtEggley]

already said by others - A common cause is cold walls and concrete when humid air hits it. It can be perfectly dry in your house, but put ice cubes in a glass and it will sweat and leave a puddle around the glass. The only way to stop it is lower the humidity. Opening the doors just brings in more humid air from outside.

 

[911mike]

I always run a large ceiling fan. Sometimes it’s on high but moving the air really helps. My shop has 3 large fans in southern FL and I have very little moisture problems.