Mystery wet spots

[biscuitmom]

Originally Posted by u565425

...the last 3 days I woken to finding water under the desk and in a big puddle to the left side of the desk........at first I thought maybe crack in window as it had rained the night before.......but again here yesterday......my husband did not believe me (thought it was the pets ) until he woke up this morning to a puddle to the side of the desk.........apparently it is not coming from anywhere under the desk because he got it rather early and he put down double towels on it...........the towels are not "soaked" but are very damp...

Is the desk or something on or around it made of metal or aluminum or glass? Rainy weather means high humidity that can cause condensation to form and drip. For instance, this is a known (albeit uncommon) problem with some laptop computers, especially aluminum body MacBooks.

Alternatively, we had an outdoor faucet just outside a bedroom wall and the pipe running under the slab broke and leaked and gradually seeped up through the concrete and dampened the carpet. Don't know if that can happen with terrazzo. It was a relatively inexpensive fix since the leak was so close to the outside wall.

[LORETTA39]

Originally Posted by old_cold

We're baffled.
Situation: Old doublewide on full very damp cellar.
Tore belly wrap and insulation out to check floors. Totally dry (from above and below) and only a small section of minor old swelling next to marriage joint which we've since sealed up during floor leveling.

A month goes by and yesterday ...after yet another 2 days of rain.....wet spots on the floor of one room (room is over wettest part of cellar)
OK...assume it has migrated up through the floor and go down to staple plastic up in place of the old belly wrap.

Look up and the underside of the floor looks pristine!!

Windows were open a bit but the worst spots were 12 feet across the room so doubt if it 'rained in'.
Is it at all possible that the top of steel beams could be damp enough to be transmitting any moisture?
Obviously we can't 'see' the underside of the floor where it sits on the beams.
It's all I can even think of.
Any other thoughts?
By the way....this has been like this with a wet basement for many many years and when we tore the carpets out a month ago there were no wet spots present and we've dried the basement out considerably since then.

Have you found out you problem? I am very curious i have a single line of moisture in my home double wide an it is dry underneath also cannot for the life of me and a dozen or more folks fiqure it out