[Shop-talk] Testing for moisture in a concrete floor

[Jim Stone]

Thanks David.  I suspect that is going to be my best option, but I have emailed GarageFlooring to get their input, too.  I don’t have a humidity meter in the garage, but they are cheap enough and I suspect one is in my future.

Jim

> On May 22, 2017, at 2:40 PM, David Scheidt <dmscheidt at gmail.com> wrote:
> On Sun, May 21, 2017 at 8:43 PM, Jim Stone <1789alpine at gmail.com> wrote:
> 
>> 
>> The test kit says to do the test when the humidity is between 40% and 60%.
>> That isn’t possible here.  It was much higher for the first test, probably
>> 60-90% over the three days and included a day of rain.  This test was
>> 60-70%, about normal around here.  While the space is heated, it isn’t
>> air-conditioned and it didn’t occur to me that I could have put a
>> dehumidifier there until just now.
> 
> Run a dehumidifier.  Get the humidity down to acceptable levels, keep
> it there for several days, and repeat the test.  It's not impossible
> that your floors are that wet, especially if you have a high water
> table or poor drainage around the garage.  How much more humid is the
> garage compared to the surrounding free air?  If it's much higher,
> there's moisture moving into the garage form somewhere, and the floor
> is most likely.
> 
> 
> -- 
> David Scheidt
> dmscheidt at gmail.com