Ducts In Attic Insulation

Before adding blown insulation inspect and test the ducts for missing or torn duct insulation.

Ducts in attic insulation. R 8 duct insulation 5 227 btu hour. All the ducts are in the attic. Covering ductwork with insulation. Is it ok to do it.

Disconnected or leaking ducts. In existing homes with vented attics and hvac ducts that are installed on the attic floor bury ducts in blown attic insulation when adding or increasing attic insulation. Hvac ductwork is typically visible in your attic especially flexible ductwork. Looking at the cooling side only the additional load would be.

Use a paintbrush to apply duct mastic to the joints where an elbow. Or excess flex duct. When hvac ducts are installed in a vented attic in any climate encapsulate the hvac ducts in attic insulation to protect them from temperature extremes in the unconditioned attic space. 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.

Purchase duct wrap insulation that complies with the 2009 international energy conservation code iecc standards that specify an r value of 8 for attic ducts and 6 for ducts located anywhere else. Ductwork is the system of ducts and pipes that circulate heated or cooled air throughout your house. If your attic has enough insulation and proper air sealing and your home still feels drafty and cold in the. What is the crawl space a crawl space is usually found under your house.

If the ducts in your home are in unconditioned space seal and insulate them. According to rightsuite the software we use the supply ducts have about 560 square feet of surface area and the return ducts 101 square feet. 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. They are the sheet metal or fiberglass conduits you find in your basement and attic.

Today s flexible ductwork is covered with a shiny metallic cover this is its vapor barrier. Press a continuous strip of foil tape to all longitudinal seams along straight runs of duct. If necessary switch the wires to reduce the blower to its lowest. Check the speed of the blower motor on the furnace.

Although both the attic floor and the ductwork are insulated ted recognizes the situation isn t ideal. The shiny vapor barrier will protect the ductwork from sweating as long as it s exposed to the surrounding air.