The customer called s because they had a condensation problem with the ducts in their 1st floor town house family room. This home, typical of many town homes in Ashburn, with a 2 car garage to the front of the home, and a family room tucked behind it.
The problem was a clear air pathway from the space over the garage to the cold ducts in the ceiling above the family room. We had to seal the rim joist to the exterior, and create an air barrier with silverglo foam block between the garage and the family room.
The results were instantaneous, and this Ashburn home owner now has a house that is air sealed and does not sweat.