condensation problem in garage?

[jargey3000]

a stupid question, maybe somebody knows. I seem to have a lot more condensation in my (attached) garage than my neighbors. all the house in this subdivision built by same contractor, about 8 yrs ago.
could it possibly be because I've painted my concrete garage floor- with latex concrete floor paint?
does it have anything to do with concrete "breathing" or whatever? any comments / advice appreciated.

 

[LegacyIndustrial]

Condensation can mean a few things...
hydro-static pressure and efflorescence due to "No Vapor-Barrier"
or...
surface moisture caused by cold-slab vs warm-air or warm-slab vs cold-air.
or...
poor drainage on the outside of the home

The temp-delta issue can be solved by air-flow, the other two can be more evasive to treat.

 

[jargey3000]

thanks.
I'm guessing my prob. might be #2 above. which one is the temp-delta issue?lol
Its worse in the cold, winter weather, plus we live in a fairly high humidity climate. we have electric heat but I've been keeping it off in the garage , as do my neighbors.
any advice?

 

[Vicdog]

I put a polyurea Coating on my garage and patio. Cold slab and warm moist air = wet floor. Goes away when the ground warms up later in spring.

 

[LegacyIndustrial]

thanks.
I'm guessing my prob. might be #2 above. which one is the temp-delta issue?lol
Its worse in the cold, winter weather, plus we live in a fairly high humidity climate. we have electric heat but I've been keeping it off in the garage , as do my neighbors.
any advice?

Ceiling fan


Sent from my iPhone using Garage Journal

 

[bigjon]

We don’t get a lot of rain or humidity, but when we do and the weather is warming up and my slab is still cool I can get a lot of condensation on my shed slab. Floor coatings would make it worse as the moisture can’t absorb into the concrete.

 

[Showkey]

Cold slab warm condensation............coating won’t fix or cause. Ceiling fan will have little effect if the temperature and humidity conditions don’t change. Think of it as a iced tea glass on warm humidity day.

 

[Toomanytools?]

I put a polyurea Coating on my garage and patio. Cold slab and warm moist air = wet floor. Goes away when the ground warms up later in spring.

I have something similar, I did use a vapor barrier under slab and then sealed with densifier. I get when temps are below freezing dark spots in a few areas, at this point shop isn't heated. Don't think it's a concern, it not actually wet to the touch.
The other thing I haven't noticed it in the part of shop that I didn't seal floor ( because I plan to epoxy) so moisture must be getting trapped just a bit.

 

[Armorpoxy]

Good airflow and ventilation of the space can often cure this problem we have seen.