Ducts In Attic Insulation

Use a paintbrush to apply duct mastic to the joints where an elbow.

Ducts in attic insulation.

Before adding blown insulation inspect and test the ducts for missing or torn duct insulation. Looking at the cooling side only the additional load would be. R 8 duct insulation 5 227 btu hour. If the ducts in your home are in unconditioned space seal and insulate them.

Check the speed of the blower motor on the furnace. If necessary switch the wires to reduce the blower to its lowest. What is the crawl space a crawl space is usually found under your house. 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.

If you re building a new house place ducts in the conditioned space to avoid the energy losses associated with most duct systems. 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. If your attic has enough insulation and proper air sealing and your home still feels drafty and cold in the. Hvac ductwork is typically visible in your attic especially flexible ductwork.

Or excess flex duct. Although both the attic floor and the ductwork are insulated ted recognizes the situation isn t ideal. Is it ok to do it. They are the sheet metal or fiberglass conduits you find in your basement and attic.

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. 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. 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. Today s flexible ductwork is covered with a shiny metallic cover this is its vapor barrier.

All the ducts are in the attic. 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. Install ductwork so that it is in direct contact with i e laying on the ceiling and or truss lower cords. Press a continuous strip of foil tape to all longitudinal seams along straight runs of duct.

The shiny vapor barrier will protect the ductwork from sweating as long as it s exposed to the surrounding air. Ductwork is the system of ducts and pipes that circulate heated or cooled air throughout your house.