help me solve this issue - I am getting moisture coming up from concrete floor. I used redguard to paint two of the floors before putting carpet, need to do that to the third.

The house is 63 yrs old, no big visible crack in the concrete.

Foundation company tech said nothing wrong with the foundation. Its houston so no basement.

What would you do next? I was thinking i should get the sewer lines inspected to see if there is a leak??? (A camera inspection wont solve this right??)

How much moisture are we talking? Like, the carpet feels damp? Visible water?

Is there any section without carpet and does that concrete look/feel damp?

And, it doesn't small like sewage, right?

- John...

It doesn't smell like sewage, concrete feels cold/wet but if left exposed dries out. However if I leave a plastic bag taped, moisture will collect.

It doesn't smell like sewage, concrete feels cold/wet but if left exposed dries out. However if I leave a plastic bag taped, moisture will collect.

Sounds like the water table might be close to the floor.

Is the house on a hill/slope where runoff might come down and and go under the house? Does it happen more when it rains? (If so, you'll probably need a French drain across the whole house to divert the water flow.)

If house is on level ground there might be a small spring under it.

Odds are, the old floor does not have a vapor barrier under the cement. You might add a vapor barrier (6mil plastic) and pour a second layer of cement over it.

You might also cut a hole in the floor and add a sump pump to lower the water level.

Oh, it's in Houston!

Assuming it's not a plumbing issue, how well does your house drain rainwater away from the foundation? I suspect that the water tables in that area have risen since the flooding. What about installing french drains 1-2 feet beneath foundation on the low side? If you have to, you can install a sump pump to remove the water.

Who you should contact depends on what is causing it.

A landscape contractor could handle the yard. (French drain or a swale)

I have French drain on 2 side of the house. The water doesn't collect any different in a rain...its a mystery...am rethinking of doing the French drain correctly...don't think it was done right...

I think having the ground wet like it did due to Harvey didn't help as there was just so much water

Is this something recent or has it been going on for months?

Are they getting condensation on the interior of the windows?

What's the outside air temperature? Have you been having exceptionally cold temperatures like a lot of the south?

It's possible that the uninsulated slab is conducting the cold into the living space & the high humidity level results in condensation forming under the carpet on the concrete slab.

I agree with David -- this might be just a humidity issue.

And that humidity, if it stays that high, might be caused by a leak or some other water source completely unrelated to the concrete floor!

If it were me, I think I'd run a decent humidifier for a week and see if the problem goes away (or at least see how often you need to empty it so that you know how much water you're pulling out).

70% is up there! Especially for Texas (when not flooded)!

- John...

I have water issues at every foreclosure I buy. Every single one of them. I start with the grading of the property usually. Sometimes it is a very easy fix where I buy tons of cheap dirt and have them dump it where I want in my yard and I rake it out and plant grass seed. That's a cheap fix. Sometimes I have to install a french drain but it has to be done perfectly. Sometimes a large dehumidifier solves the issue. Sometimes Drylok fixes the issue for a couple of years or longer. Also Masonry caulk is your friend for any cracks in foundations.