Insulated Attic Duct

Use metal flex or fiber board ducts that are insulated to code.

Insulated attic duct.

Although both the attic floor and the ductwork are insulated ted recognizes the situation isn t ideal. Reflectix r 21 100 sq ft unfaced reflective roll insulation 48 in w x 25 ft l item 13358. For pricing and availability. Most attic ducts are insulated flex ducts that is flex ducts with r 6 or r 8 fiberglass insulation along with an exterior polyethylene jacket.

Attics that are poorly insulated will not efficiently recycle the air being blown by the ac heat which rises to the attic but with the right r value inches of insulation air will be properly reverted back into the house saving your ac heating unit from overworking and keeping your bills from skyrocketing. Acute temperatures in these areas contribute to thermal loss in metal ductwork. A metal duct conveying cool conditioned air through a broiling attic in summer or warm air through a chilly crawl. Summer hasn t even arrived he notes in a post at gba s q a forum and when the temperature outside climbs to more than 95 f the temperature in the attic tops 120 f.

When these ducts are exposed to exterior air the plastic jacket never gets cold enough to permit condensation because the hot attic air keeps the plastic jacket warm. For pricing and availability. The duct insulation should include a vapor barrier cover.