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Old 07-11-2014, 01:18 AM   #127
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Moisture detected in floor - what now ?

Sonin meter ordered. How do I sharpen the probes without ruining the sensor? Maybe that will be obvious when it arrives.
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Old 07-11-2014, 01:28 AM   #128
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Be very careful sharpening the probes, the metal is soft!!! I used a flat file, and it only took a few moments to sharpen them up slightly.
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Old 07-11-2014, 07:22 AM   #129
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Yes, sharpen the Sonin probes carefully with a flat file, do not be aggressive. This makes it very easy to poke through the vinyl finish floor in the plywood subfloor, and the sharpened-probe holes in the vinyl virtually disappear.
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Old 07-11-2014, 07:30 AM   #130
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I'm not knocking any type of moisture meter, but here is what I do like about a percentage scale. Not only will it tell me before I have a huge leak, but rather, a weep by comparing it to a known dry sample, but on the other end it will tell me when I am finally dry under the carpet and can quit running the dehumidifier and fans.

It is pretty accurate, at least on a comparative basis with the pine in the garage. It also does have a "dry, moist, and wet" indicator, if you prefer that. During the dry months, normal reading is 5 - 10%. During humid months 12 - 17% is normal. If I saw my test piece at 5% in winter and I tested 16% (like last winter) in the floor, I am looking for a seep.....and I found one.
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Old 07-11-2014, 08:21 AM   #131
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Another example of what to expect with a Sonin meter.

If lay it across my dry finger the needle will move slightly, if I probe my normally dry Airstream subfloor with it the needle will not move. When the 9 volt battery runs down, the amount of needle deflection is less.

This meter is inexpensive and I wouldn't put much stock in the accuracy of the percent scale. The more the needle moves the wetter the subfloor, that's all I need to know to check for leaks and how much it is drying out after repair.
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Old 07-11-2014, 08:25 AM   #132
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Personal preference is why the market works!....sometimes.
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Old 07-11-2014, 09:36 AM   #133
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That's it Rich. The important thing is to have a reliable method to check for wet plywood. A lot of owners have had leaks and never knew it until the table leg fell through the rotted floor.
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Old 07-11-2014, 06:18 PM   #134
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The entirety of my floor does not move the meter at all - except the spot in question

I use a dehumidifier 24/7 - keep at 50% humidity now during summer
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Old 07-11-2014, 06:20 PM   #135
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Good to know about the floor being dry to touch but "wet" - that's what mine did - made me worry that it was not wet but the is not only tripping there for a reason
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Old 07-11-2014, 06:49 PM   #136
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That's why "dry to the touch" is not a good test. The surface can be nearly dry, but wet below the surface where the probe is reaching.
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Old 07-11-2014, 08:33 PM   #137
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Ok - so rechecked - edges exposed for past week are dry - proving through covered portions still trip meter - I may end up doing that golf ball trick to help it dry - the wardrobe is in the way of lifting back the main area but I can dry most of the area - or at least a good bit if it

It's dry as a bone here - once rains again new leak would be obvious
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Old 07-11-2014, 09:20 PM   #138
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Try some rice.

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Old 07-11-2014, 10:32 PM   #139
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Keep the edges exposed, eventually the moisture will migrate toward the exposed dry area and evaporate.
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Old 07-11-2014, 10:35 PM   #140
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Done and done

Thanks!
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