The attic’s insulation of Mr. Gagnon's house was insufficient. There were only 10 in. and less fiberglass mats, which was equivalent to an R-25 value. This made her home uncomfortable, rooms were often too hot in summer and too cold in winter, and her house’s energy costs were very high.
Reinsulate the attic to achieve an R-60 value and thus make the house more comfortable and energy efficient.
We sealed all the air leaks on the attic floor, insulated the duct system as well as the chimney and insulated the vertical wall separating two attic levels. Then we installed vents all the way through the soffits and then blew just over 16” of cellulose fiber.