During the phone call I heard, "The loft room is always warm - it won't cool, no matter what."
They understood I have the ability to "see" insulation. While that is not exactly true, Mighty Mo has the ability to distinguish warm from cool, and can "see" where insulation is and is not.
So, we went up into the room. It was dramatically warmer than the third level, which was warmer than the main level.
The thermostat on the third level was set to 72F. That's pretty cool. But going to the fourth level, or the loft room, the ambient air temperature was 87F. That's pretty warm!
These are only two of many thermal images I could publish to demonstrate that the insulation in this room was very, very poorly done.
Obviously the hot spots can be seen all over. Not a hot day outdoors, about 82F, the angled walls in this room are quite warm, about 97F. Imagine how uncomfortable this room would be on a very hot day!
I said, "This room is very cold in winter, right?"
"Yes! How did you know?"
My recommendation: poor insulation in any room will have an effect on that room during every season. Heat seeks cold during every season! It intrudes during summer to heat the room with radiant heat. And it exits during the winter to cool the room as cold follows. When insulation is not done properly to begin with, it does not improve, and an make any space very uncomfortable. The HVAC system simply cannot keep up with such poorly-installed insulation - in any season.