Energy efficiency 2

Insulation Dam

My "Insulation Dam". The once bright yellow insulation is now a dull yellow gray/brown. It has been acting as a 'furnace filter' for 15 years, catching the dusts that have been blowing up through the soffits and into my attic. When air blows through fiberglass, the fiberglass loses its R-Value. Fiberglass has to be contained on all sides to be effective insulation.