This is a picture of a deck during the day. Pay attention to the surface tempretures.
The bottom of the wall shows signs of moisture.
This is a picture of a bedroom ceiling. The blue area shows lack of insulation. Blue means cold. This picture was taken early morning. The attic was cold.
This is the picture of the same bedroom during the day. The yellow area means lack of insulation. Yellow now means heat.
This is a picture of a attic door. Blue means cold, which means no insulation on the door.