Unless it’s rigid insulation, which is the preferred foundation wall insulation (minimum, sometimes used as the base) in my area.
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I understand.
I wasn’t worried this might be a defect. The house didn’t have any problems associated with this. I was just curious about what would make this show up on a thermal imaging camera.
Thank you all for taking the time to help me out.
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I considered the rigid between the gypsum and the basement foundation wall. IMO, I would expect that to remove the thermal anomaly. Also, that wall is pretty cool compared to the ceiling.
Robert, was there a heat source in the basement?
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That you know of!
What about in the dead of winter?
Or the heat of summer?
Or the rainy season?
Etc… etc…
Did you disclose enough and properly in your Report to CYA?
(How’s your insurance)?
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Also that you must verify all anomalies seen with an IR camera with a good moisture meter!
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I agree with Scott, when you do Thermo and get that result, next would be moisture meter test. What was outside and Inside Humidity & Temp. Anything adding moisture to the exteriior.
The temperature difference in the circular anomalies are not much cooler than the surrounding surface.
Look at the top thermogram. Image 8252. That image needs correction.
I do not think moisture readings would reveal the presence of significant moisture intrusion, if any at all. Moisture bleeds.
To myself, what causes the temperature signatures of these circles were manufactured mechanically. A sealant per say.
Comparing IR exceptions with moisture meter readings are not relative to one another.
Yes, they recommend that as a backup to identify potential non-moisture issues, but neither of the devices actually measure moisture, just conditions that could be associated with moisture.
Causes of thermal variations:
Density
Emissivity
Surface albedo
Moisture (evaporative cooling, and specific heat).
None of these are measured by either IR or Moisture devices. They must be calculated.
What William mentioned, [quote=“William Kading, post:47, topic:248665, username:wkading”]
What was outside and Inside Humidity & Temp.
[/quote]
With this, you can calculate a wet bulb measurement. The results are relative to the wet bulb temperature based upon moisture at the surface.
As Robert pointed out, [quote=“ROBERT YOUNG, CMI, post:48, topic:248665, username:ryoung7”]
The temperature difference in the circular anomalies are not much cooler than the surrounding surface.
[/quote]
As a rule of thumb, moisture can generally have a 4 degree differential (+/-).
There is no Delta Measure reading on the camera, so I don’t know where he came up with the differential, but I agree that it is not that much. The whole screen is 9F Delta T. Need to take it off Auto.
So again, we are being asked a question that does not provide sufficient data to make a scientific wild ass guess, so anyone can be right.
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