High Resolution Infrared Thermal Imaging… 

What is a HIGH RESOLUTION INFRARED THERMAL IMAGING camera?  HIGH RESOLUTION – The highest pixel count (680×480) provides more information and clearer images than a lower resolution (80 x80).  INFRARED (IR) is a different part of the electromagnetic spectrum of light than our eyes see.  Infrared is just below visible light that our eyes see.  Ultraviolet light, on the other hand, is the spectrum just above our perception.  All surfaces emit and reflect infrared waves through the air.  These waves travel through the lens of the camera which focuses them onto a sensory array called a microbolometer.  The wave strength is measured by the sensory array and converted by a signal processor to a visible light value.  Grayscale signals from all the pixels are converted to a TV signal forming a composite image.  THERMAL IMAGING – the IR camera shows us surface radiation or temperature patterns.  It does not see inside walls, that would be an x-ray.  We are usually looking at the affects or images of evaporative water cooling like when drywall is wet and conductive thermal transfer like when insulation is missing.  With our knowledge of building characteristics, construction materials and thermal transfer, we interpret these temperature patterns to produce a building performance diagnostic inspection report.  The camera makes for a faster, more accurate damage assessment.

 Things that inhibit or obscure this process are items with a low emissivity, products like shiny wallpaper, cove molding, glass, metal and tile which reflect like a mirror. When conditions are right, finding moisture intrusion is like shooting fish in a barrel.  The best times for camera use are when temperatures are changing rapidly or things are in a steady state like the missing insulation in the middle of the afternoon or the water intrusion came from the rain the night before or when exterior ambient temperature is extreme and our HVAC system is operating just the opposite, it makes it easier to see heat loss/gain around windows and doors.  First thing in the morning as the sun rises and warms the surface of walls/windows or later in the afternoon when the sun goes down and surfaces start to cool are great times to find things more subtle or in a transient state.   The larger the thermal mass the slower the temperature change compared to other materials around it.  Solid concrete downpours are very easy to see in a block wall.

Night vision goggles and video cameras with nightshot are not the same.  Night vision simply amplifies a small amount of light.  Infrared wavelengths we are concerned with do not pass through glass and those products do not have the processors to convert IR to visible light images.

What else is it good for you ask?  It is excellent for identifying HVAC leaks or insulation issues inside and outside the home.  We can also see each solid concrete downpours.  Moisture intrusion detection however, is our main focus.  For flat roofs, moisture entrapment can be isolated for repairs.  In an EIFS home, moisture intrusion around building envelope penetrations.  We have even found a sub slab plumbing leak and many window and roof leaks.  We have even located multiple upstairs shower pan leaks from underneath!  Often times we find more than we bargained for.  One particular house we were called on to find the source of A leak.  We found seven!  Five of them were unrelated to the issue that generated the call!  THIS IS THE FUTURE OF BUILDING INSPECTIONS.

Got questions, give me a call at 407.678.HOME or email me at jon@inspectagator.com.  Please also visit our other web site, www.buyaware.net.  If we all stick together, nobody gets burned!