You guys always have good thoughts.

We had carpet pulled up yesterday to have some tile laid. The tile guys found some water under the carpet. We freaked out and called out roofers, ServPro, leak detection, etc. The leak detection guys got out first and found no water in any of the walls, baseboards, etc. They ran their pressure tests and hydro-static tests and confirm there are no plumbing leaks. His gun found no moisture anywhere. The moisture on the slab was gone and hasn't come back. We had good rains last night too.

Nothing for ServPro or roofers to do so they left. Foundation is still dry.

Immaculate Moisture? Leak detection guy speculates it was moisture from the slab that got caught between the carpet pad barriers and the oil based paint overspray on the floor from when the house was built in 2018. That makes no sense to me.

Any thoughts?

Do you have a clumsy wife or kids who have a knack for spilling things and not fessing up?

No. And it was under the pad. The carpet wasn't wet, so it had to come from underneath. Dry again today and we had more rain last night. Pool guys came out and there is no leak in the pool either. They did dye test and cut off the autofill and there was no drop in water level. Whole thing makes no sense.

Only time I've seen this is a master closet next to a garage where water shot under the bottom plate when the garage was pressure washed.

What is the location of the carpet and what rooms are next to it? I pulled up some carpet in our closet that was wet. It backed up to the shower. Tile shower bench wasn't waterproofed and water was seeping out of shower and into closet.

Do you have brick exterior? Water can come in through a weep hole on rare occasions. Maybe it rained just right to cause this issue.

The wet carpet was in the master bedroom. It is next to the master bath, but all of the walls between the rooms were dry, baseboards as well. The leak detection guy couldn't find any moisture in the master bath.

The master bedroom is also as close as allowable to the pool, which was my first fear. The pool guys have come out and done all of their testing and there is no leak. They did dye tests, pressure tests, cut off the auto filler, etc. No leaks in the pool.

It has been bone dry since it was dried up. No more moisture. We are going forward with tiling over it.

So strange.

And yes, the exterior of the master bedroom portion of the house is brick.

The engineer in me always wants an answer. The homeowner in me has learned to move on at the right time. Sounds like that time is now

I had water under my carpet I posted here two years ago that I never really found the source. I had leak detection, foundation, drainage, gutter, and roof guys all come out to inspect, and nothing was found wrong. My assumption was that water was coming up through the foundation somehow.

I put RedGard and on the floor before putting in new carpet, because that's the only solution I could find.

I will say it might not be unusual that you had moisture when the carpet was down but don't when it's up, even during rain. If it rains heavily, my garage (floor is bone dry except for underneath trash bags or other things that lay flat in the floor. I assume where the foundation can breathe, the moisture evaporates away, and only gets wet where the moisture is trapped.

My neighbors all have the same issue, so I assume they just messed up the vapor barriers when they built the foundations for the houses in this neighborhood.

When was the house built? Never-ending. You said 2018.

I don't think it'd be moisture through the slab, unless there's no vapor barrier or it was poorly installed. I mean, the a/c should dried that thing out long ago.

Imma guess a little water under a plate at some point. Maybe a one off.