Can someone explain this?

[bigndn]

My shop isn't heated 24/7, only when I'm out there. It's not sealed off from the loft (yet), but I'm working on it. The loft isn't insulated, and it has open vents.

Yesterday morning, the floor was bone dry. I started a fire and went to work. As the morning progressed, the floor got wetter and wetter. I left a fire burning and the fans on last night, and it's bone dry again this morning. If I keep the heat going, it'll stay bone dry.

The craziest thing is that wherever a bucket/rubber tub/bag/anything was in contact with the floor, that small area stays dry.

Condensation????? Moisture coming thru the concrete?? What the hell is going on here? Would sealing the concrete help this?

 

[Koffer]

cold floor/ground warm humid air whats happening is the moisture in the air is condensationing on the floor just like in a car on the windows.


Wont happen if something on the floor blocking the warn moist air .

 

[cruiser88]

yea.........there isnt a moisture barrier.

 

[Toyo FJ40]

yea.........there isnt a moisture barrier.

Would still do it if there's a moisture barrier. The moisture is from the air not the concrete. My lower level of my house would do it in the summer and it had a vinyl floor. As long as the floor was cooler than the air and the humidity was high the floor would get wet. It stopped when I carpeted the floor because the carpet and padding insulate the floor from the air.
Once the floor warms up it should stop.

 

[cruiser88]

My basement dont do it..........perhaps add some of those moisture traps that hang up..........oh I will have to go look what it is called

 

[cruiser88]

ok....here is what I have
Desi Pak® Performance and Physical Characteristics

They are in bags and hang up in various places

 

[Joe_E]

My shop isn't heated 24/7, only when I'm out there. It's not sealed off from the loft (yet), but I'm working on it. The loft isn't insulated, and it has open vents.

Yesterday morning, the floor was bone dry. I started a fire and went to work. As the morning progressed, the floor got wetter and wetter. I left a fire burning and the fans on last night, and it's bone dry again this morning. If I keep the heat going, it'll stay bone dry.

The craziest thing is that wherever a bucket/rubber tub/bag/anything was in contact with the floor, that small area stays dry.

Condensation????? Moisture coming thru the concrete?? What the hell is going on here? Would sealing the concrete help this?

The heat is rising up and coming into contact with the cold air up in the loft .
You have the makings of a thunderstorm in your garage.

Maybe try running a dehumidifier.

 

[bigndn]

Would still do it if there's a moisture barrier. The moisture is from the air not the concrete. My lower level of my house would do it in the summer and it had a vinyl floor. As long as the floor was cooler than the air and the humidity was high the floor would get wet. It stopped when I carpeted the floor because the carpet and padding insulate the floor from the air.
Once the floor warms up it should stop.

ok....here is what I have
Desi Pak® Performance and Physical Characteristics

They are in bags and hang up in various places

The heat is rising up and coming into contact with the cold air up in the loft .
You have the makings of a thunderstorm in your garage.

Maybe try running a dehumidifier.

Thanks, guys!

This is pretty much what I suspected, but it's hard to believe that the concrete can get that wet from humidity. I got the loft walled off, but still have to enclose the stairs. Simply building that 5' wall pushed the heat down from the 14' ceiling to raise the temp at my work bench to 73 degrees. Before building the wall, the highest I was able to achieve was 62 and the stove was cranking.

Final project of the weekend was a "high visibility, quick detach, anti-shin buster" for my backblade on the tractor. That's fancy terminology for a strip of bright yellow garden hose split lengthwise and slid over the moldboard. Of course I decided to do this after the 2nd time I bashed my shin on it. :whoops: