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re: Slab leak detection - plumber recommendation?

Posted on 7/25/23 at 5:10 pm to
Posted by jamiegla1
Member since Aug 2016
7014 posts
Posted on 7/25/23 at 5:10 pm to
I put down an 8'x8' piece of visqueen over a portion of floor that had previously dry and previously wet spots. It's been a day and I can see the condensate near the crack. Im going to keep playing with this method to see which end of the crack its coming from.

I didnt notice any condensate overnight but it was there when I got home around 3 pm today. Im wondering if my sprinkler system in the back is causing it. I'll probably do a couple experiments with this.

Again, this thread has been very helpful. I really do enjoy troubleshooting myself or with the help of a few others when I can.
Posted by LSU82BILL
Fort Lauderdale, FL
Member since Sep 2006
10334 posts
Posted on 7/26/23 at 10:59 am to
Repair the slab with crack filler and a vapor barrier and you should be fine. Most laminate flooring comes with combination vapor barrier/soundproof cushion too. They're also making moisture resistant laminate that you can't differentiate from engineered wood flooring.
Posted by baldona
Florida
Member since Feb 2016
20514 posts
Posted on 7/27/23 at 7:27 am to
I don’t think it’s very likely water from outside your home is going under your house and causing an issue OP. If it was that much of a leak you’d almost definitely notice it outside.

My parents had a leak under their master bath bamboo wood floor. It was a pinhole leak in the copper supply and crazy thing is it was the hot water and it made that spot noticeably warm through the slab and flooring. They ended up paying a plumbing company $400 per fixture to re run pex through the attic to their entire house.

Without knowing more of your specifics it’s hard to pinpoint, but if that’s a remodeled area I’d certainly 100% eliminate anything related to that under the slab.

You could turn your water off and bring in water from the outside (pool in buckets) and dump into the sinks/ drains and see if you are getting moisture from a sewage line?
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