How to spot invisible moisture damage and possible mold in a house when you cannot see itOct 27 2013 · 0 comments · Home Inspection, Infrared Thermography, Mold
Superman has the super power of “X-ray” vision which allows him to see behind walls or inside houses. Imagine if you have that power before you buy your next house? Read more about infrared thermal imaging and seeing behind walls.
What other defects and damages can infrared thermal imaging detect that is not visible to the human eye? Moisture! How is that possible you ask? Remember that infrared thermal images display temperature difference. The image produced is a thermogram displaying surface temperatures relative to one another.
So why does the drywall under the window clearly show a cooler temperature? Recall that blue is cooler compared to red or orange. If the temperature was not significantly different, we would not look further into this. The mostly like two reasons include missing insulation behind the drywall or the drywall is moist. We use a moisture meter to eliminate the moisture issue, leaving the missing insulation the most likely explanation. However, if the moisture meter indicates moisture, we inspect the window well and window still closer for signs of moisture damage. We always confirm with a moisture meter reading before concluding moisture damage.
If the moisture meter comes up positive and the window still shows moisture damage, depending on how long this condition has gone on for and whether the immediate area has good ventilation or not, this could be good conditions for mold growth if left unchecked. Also, behind the drywall would definitely be subject to mold conditions as ventilation is nil plus the ample moisture supply.
A quick scan with the Flir B-250 gives the home inspector an idea of where to investigate further. The scan is non-invasive and does not damage the walls or any other part of the house. This makes the inspection fast, accurate and provides clients with proof of defect or damage.