I live in a one story house in a rural area. Yesterday we discovered a soaking wet spot in our living room carpet. It's about a couple of feet wide and 4-6 ft long. The area has NO crawl space underneath. It sets on a concrete slab. The original house (about a foot from the spot does have a crawl space, and looking under there there are no leaks or wetness. It is not from rain or water table - it has rained very heavy many times in the last six months and has never had this wet spot. I don't think it is getting worse. It is drying somewhat. But the fact remains SOMETHING caused it?? If I tear up the carpet, that doesn't mean I will be able to see any water or where it is coming from, but it does leave the expense of having the carpet restretched and put back. A plumber came out yesterday (Sat about 9:00pm) and left scratching his head? Don't know what to do; to look for. Any ideas?

Let's do some checking, Pump or city water? Back to you, Tom

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Originally Posted by banjob

I live in a one story house in a rural area. Yesterday we discovered a soaking wet spot in our living room carpet. It's about a couple of feet wide and 4-6 ft long. The area has NO crawl space underneath. It sets on a concrete slab. The original house (about a foot from the spot does have a crawl space, and looking under there there are no leaks or wetness. It is not from rain or water table - it has rained very heavy many times in the last six months and has never had this wet spot. I don't think it is getting worse. It is drying somewhat. But the fact remains SOMETHING caused it????? If I tear up the carpet, that doesn't mean I will be able to see any water or where it is coming from, but it does leave the expense of having the carpet restretched and put back. A plumber came out yesterday (Sat about 9:00pm) and left scratching his head?? Don't know what to do; to look for. Any ideas??

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Are there any plumbing fixtures in that area? Do the water and or drains run under the slab in that area? If the hot and cold water lines run overhead then you can eliminate them,if not does the water feel hot or warm? Is the slab totally sealed off in the crawl space or can you see at all under the slab? If you have your own water meter just to your house only, look at it to see if it is moving at all. It might have a small triangle that will move if any water is being used. Make sure no one is using any water in the house if you check the meter. Your plumber might have already covered this but I wasn't there. Sometimes a tiny slab leak will seal up or slow down considerably,but it is rare.

Well & septic system. Well is out behind the house and come into a utility room not near the wet spot. The plumber tells me he can see the edge of the concrete slab in the crawl space. It's too small for me to get under there, plus bad back problems. The water is not hot/warm and has no drain/septic smell. Water for the original part of the house does run in the crawl space and for the addition is overhead, with no apparent leaks either place.

Shut the pump off at the breaker. Does the pressure gage fall to zero? Let me know, Tom

It's a long shot but check your A/C closet if you have one. Make sure its draining properly. If there is tile around it the water will just go under the tile and come up where it is able.

Heat pump is outside

Shut the water pump off at the breaker. Does the pressure gage fall to zero? Let me know, Tom

Do u have radiant heat in this area? If not do u have baseboard heating that runs in slab?

Chuck

No radiant, no baseboard. Electric Furnace and outside heat pump for cooling. That's why this isn't making any sense.