Does anyone ever experience moisture under carpet pieces on the floor?

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We noticed at church that there is moisture under the carpet squares. What causes it? Can it sweat from the extreme heat we've hadn't this week? Some said it could be overtime water, coffee, pop spilled over time , how could it when it surely dried and it was so hot in the 100's. There is no windows in this building.
 
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Joanne Davenport, good evening [evening over here in the UK]

You may not realise it but if you live in he USA this is a [predominantly] UK site? Or given this is your first post you may have inserted an incorrect country of residency?

Ok your "damp problem"

is it a solid floor and the carpets sit on top of the solid, either large stone tiles or Concrete? floor?

What may?? be happening is that moisture is forming under the carpet squares because it cannot evaporate under the carpet, any moisture getting [somehow] to the surface of the floor where there is not a carpet square can evaporate, it is the carpet that is [in effect] trapping moisture where it cannot evaporate.

Try moving the carpet squares around the floor if you can and see what results you get?

As to why there is moisture under the floor? that is a different problem.

Ken.
 
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I didn't realize it is U.K.,
The floor is linoleum, and two foot square carpets laid down,
We will check, as now the floor affected has been cut out , so we will have to have the floor rebuilt now.
Thank you, we will move the carpets around and see what happens.
 
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Joanne Davenport, good evening again.

What could be happening is that during a Service, a lot of moisture is released whilst singing and a lot of people talking Etc. after the service.

The above will lead to a massive spike in water vapour in the air, not that you can see it, but it is a perfectly natural part of the make up of the air we all breath, but in this case there will probably be a lot more water vapour this is called Relative Humidity.

As an aside, we all breath out water vapour that is normal, when singing a lot more water vapour is created + the heat makes most perspire as well.

Given that your building is very, very warm, the warm air is more than capable of keeping this vast quantity of water vapour / moisture that cannot be seen in suspension. When the building cools down at night the temperature will fall, the water vapour cannot be held in suspension so it MUST appear somewhere as a form of Condensation,

Given you do not have windows which could be opened to vent the warm moist air the room will hold lots of built up water vapour.

if your floors are [say] Concrete or stone slab under the Lino then that floor will be the largest coolest area of the room and that is where where the water vapour will condense into water droplets.

One possible test of the above?? if you or someone in the congregation has or has access to a "De-Humidifier" switch it on as you leave the building at night, would be of interest to know the results you get by the next morning? is the De-humidifier full of water??

Hope this may assist?

Ken.
 
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How old is the building, it may not have any damp proofing in the floor so you get moisture rising, when it was built they didn't expect carpet to be laid on the floor
 

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