If your roofer or tenants tell you that you have roof leaks
and your roof needs replacing, call us first! Roof infrared
thermal imaging is a proven method of finding trapped
water in roofing systems. Using infrared thermal imaging,
we locate the moisture and mark the wet areas with marking paint. You can then surgically repair the roof and extend the life of your roofing system. Your results would be saving a substantial amount of money and extending the lifespan of your roof. All our surveys are in accordance to ASTM CC1153 "Standard Practice for Location of Wet Insulation in Roofing Systems Using Infrared Imaging".
We use the sun to heat up the roof materials. As the sun rises and radiates onto the roof, wet materials (having higher thermal mass) warm up slower than dry materials with a lower thermal mass. At night however, wet materials cool off slower than dry materials therefore thermal imaging can be performed during this time of uneven heating between the wet and dry. The temperature difference between the warmer wet and cooler dry materials is what the imager sees. Under the right conditions, the temperature difference will remain visible for several hours allowing the thermographer adequate time to complete the inspection.
For this type of infrared inspection process to be successful, it is important to have an absorbent layer of material layer such as some insulations, foams or wood based boards under the waterproofing membrane or between the wall panels to hold the trapped moisture, which in turn holds the heat. Roofs without an absorbent layer of material are not good candidates for an infrared survey.