This Rixeyville, VA homeowner was complaining about a cold room on the upper level of their home. After a full comfort evaluation provided for FREE by Comfenergy we found an attic that was adjacent to this room. The wall adjacent to this attic was merely insulated with fiberglass batts. The problem with this is that fiberglass does NOT stop air from travelling around and through it. This is why your furnace filter is made of fiberglass. It allows the air through, but not the dust and dirt.
Comfenergy solved this issue by using 2" thick EPS SilverGlo foam boards to secure on this wall to provide a good air barrier and an additional R10 thermal insulation value.
Now this room is toasty warm and can be used in cold winter months!!!