Anyone concrete guys here?

[ChrisZx7]

Anyone work with concrete for a living? I have a question.

I have a 4 car garage with a breezeway (Room between garage and house), the back half of garage was not built with house.

On warm days, the front half of garage floor and my breezeway sweat like hell. I mean so much moisture comes up. Why does this happen? What can i do to stop it?

Front half has a drain hole in middle, back half has a large car lift cut out in middle. So i know it can breathe.

 

[ChrisZx7]

I do not think i have a high water table in yard. My gutters all drain into large pvc pipes which take it out to ditch.

 

[Awk08]

Anyone work with concrete for a living? I have a question.

I have a 4 car garage with a breezeway (Room between garage and house), the back half of garage was not built with house.

On warm days, the front half of garage floor and my breezeway sweat like hell. I mean so much moisture comes up. Why does this happen? What can i do to stop it?

Front half has a drain hole in middle, back half has a large car lift cut out in middle. So i know it can breathe.

not a concrete guy, but my garage floor also sweats profusely, i acconut it to the very polished finish it has ?
others that are rough finished do not do this that i notice ???

 

[2smoker85]

it's what we used to call sweating slab syndrome, it's caused the dew point condensation, the difference of air coming in ur windows vents open doorways, what happens is the air meeting the concrete(colder surface) because its below dew point temp. Could also be salts in the concrete, only real way to fix it is with a good industrial cleaning agent which will help but mostly keep it as clean as possible, there is an agent called pd 680 which is pretty much a drying solvent. scrub it with that or anything u can find that will dry the concrete out.

 

[ChrisZx7]

it's what we used to call sweating slab syndrome, it's caused the dew point condensation, the difference of air coming in ur windows vents open doorways, what happens is the air meeting the concrete(colder surface) because its below dew point temp. Could also be salts in the concrete, only real way to fix it is with a good industrial cleaning agent which will help but mostly keep it as clean as possible, there is an agent called pd 680 which is pretty much a drying solvent. scrub it with that or anything u can find that will dry the concrete out.

I will try that.

But why does only half of the garage do it?

 

[2smoker85]

I used to do a lot of it when I was younger and we would get complaints from building owners due to them not cooling the building correctly, it getting hot then cold, that's how I learned about it.