"That is pretty incredible.If they have the kind of air leakage into the attic implied by their ice dam problems I expect condensation and associated issues.
It sounds like Costco isn't getting top grades for this service, even from friends:…"
HVAC design, Manuals J, S, T, & D, Duct leakage, Air flow, ENERGY STAR new home requirements, and more. Since heating & cooling are such a big part of home energy use, understanding HVAC is critical.See More
A presentation by Greg Labbé in April 2014 on retrofitting vintage home for energy efficiency. He talked about basic building science, brick houses, movement of heat energy and moisture in and out of the house, air barrier and water barrier, house…