How to Air Seal an Attic that is Already Insulated! скачать в хорошем качестве

How to Air Seal an Attic that is Already Insulated!

Insulwise is air sealing an attic floor that has already been insulated with fiberglass batt insulation. Andy Haak demonstrates clear evidence of air leakage occurring up through the wall top plates. Some people falsely believe that insulation itself will stop air leakage in attics, but we show here that that idea is a falsehood. The black streaks on the underside of the fiberglass batts (that perfectly line up with the top plates) are proof that air from the home is escaping around the top plates. The black streaks are caused from the dust in the air getting trapped in the fiberglass. Insulwise air seals every attic floor prior to insulating the attic. We do this because air sealing not only reduces energy loss from the home and improves comfort, but also greatly reduces the transfer of water vapor from the home to the attic (this is a primary cause of attic mold). In this case we are using Great Stuff foam sealant to seal these air leaks before adding additional insulation to the attic floor. Good luck sealing your attic air leaks! Andy Haak