Dehumidifier - Page 2

SNAKEYES · #21 (**permalink**) 08-25-2003, 07:47 AM

CHAPLIN:
thanks for the info on UCOAT IT...where can you buy it? do you or anyone have any experience with the Griot's floor product? i understand that any floor treatment should not be applied until the floor has had a chance to thoroughly dry for at least a couple of months.

Dick: i agree that it is also a result of a cold floor and associated dew point because i have noticed that most of the condensation problems seem to occur after we have had a real cold spell then followed by a warming trend.

is it sufficient to have a rubber mat that is just slightly bigger than the car or do you need to cover most of the floor area around the car as well?

Chaplin · #22 (**permalink**) 08-25-2003, 07:51 AM

Snakeyes-
You can buy Ucoat It over the web. Check out www.ucoatit.com I looked through their website and called them up and ordered it. I'm not familiar with Griot's at all.

mrmustang · #23 (**permalink**) 08-25-2003, 08:06 AM

Actually here, your wrong, the moisture wicks up through the concrete, even if you have double vapor barriers when the floor was originally poured. With just the addition of the rubber mat underneath my show cars, I eliminated the need to redetail the undercarriage after a winter sleep............The only reason to add a dehumidifier now is to keep the rest of the car just like the undercarriage...

Bill S.

Quote:

Originally posted by dkjos

Rather than moisture coming up through the concrete, I'd bet most of the moisture problem on garage floors is condensation caused by the concrete being colder than the dewpoint temperature of the air. This being the case, no coating is going to solve the problem unless it is a pretty good insulator, like Bill's big rubber mat.

dkjos · #24 (**permalink**) 08-25-2003, 09:57 AM

Bill,
If the problem is due to "wicking" why isn't it a problem every day of the year?

Given the the low water vapor permeability of concrete, especially when it has a vapor barrier on one side, I can't see the possibility of much moisture travelling through. The vapor pressure in the area between the vapor barrier and the concrete would have to be quite high to cause significant amounts of water vapor to migrate through 4" or more of concrete.

I think we need to devise an experiment on this.

BTW, it was good to meet you at DVSF III and finally connect a real person to your on-line persona.

mrmustang · #25 (**permalink**) 08-25-2003, 10:29 AM

The problem does indeed happen every day, but when your out using the car, and it is not sitting for at least a week or two, you do not see the condensation underneath. Do this, park the car, make sure that the underside is dry as a bone, then come back after say a week and take a look underneath. It might surprise you...........As for meeting me at the DVSF III, are you sure it was the "Real" me

. I was told that my "body double" is out there, and has been seen in the mid west.......................

Bill S.

Quote:

Originally posted by dkjos

Bill,
If the problem is due to "wicking" why isn't it a problem every day of the year?

BTW, it was good to meet you at DVSF III and finally connect a real person to your on-line persona.

dkjos · #26 (**permalink**) 08-25-2003, 12:00 PM

Bill,
Glad you see the light, as your use of the term "condensation" indicates.

ENTDOC · #27 (**permalink**) 08-25-2003, 04:29 PM

I think it is condensation from the temp differences.If it were wicking through the concrete it should be worse after a rain.Mine at least, occurs when the humidity is high and a temp change occurs.Also if a pair of rubber shoes or mat is on the concrete it is dry underneath after this occurs. chuck