Covering Flex Duct With Insulation

Cover the metal ductwork with closed cell spray foam.

Covering flex duct with insulation.

Ecotouch insulation for flexible duct owens corning ecotouch insulation for flexible duct is a lightweight flexible resilient thermal and acoustical insulation made of inorganic glass fibers bonded with a thermosetting resin. In the example given for the best results we recommend first insulating the lower surface of the duct then the side walls and lastly the top. How to cover round air ducts with insulation 1. Clear away clutter that blocks your access to the air ducts.

Installing contractors prefer it for many reasons including improved handling easier cutting and less dust. Cut a second length of standard insulation batt to the length of the horizontal duct to cover the duct s underside. If there is damage to the metal or flex pipe duct repair it first. The cost and effort to add more insulation is minimal.

This will prevent the penetration of humidity. If it s uninsulated you should insulated it to at least r 4 to r 8 for dfw. In some cases the insulation is flex board which itself is the pipe or duct. We offer a range of fiberglass duct wrap solutions that provide traditional sheet metal ducts with improved thermal insulation.

Add additional sealant if necessary. Mechanically fasten and mastic seal all duct connections. Download brochure pdf v 1540886844000 6 23 mb. If you want to cover metal ductwork with blown in insulation t hese steps must be followed in this order.

2 cut a piece of foil tape large enough to cover. To attach flex duct pull back the outer liner fasten the inner liner over the collar with a tool tightened tension tie and mastic seal the connection. Our duct wrap is available in a variety of densities thicknesses and with or without facings. Consider adding more insulation as ductwork is farther from the furnace.

Seal all duct joints with foil faced duct tape. Use on rectangular and round ductwork. Test total duct leakage. The best way to address poorly insulated attic ducts is to replace older flex duct with newer flex duct with a higher r value at least r 8.

Apply k flex contact adhesive to the insulation surface and to the duct surface. If you need to bury the ducts in insulation the only safe way to do it is to first install a 2 inch layer of closed cell spray foam on the outside of the ducts. The foam provides a vapor barrier so the ductwork won t sweat. The duct insulation should include a vapor barrier cover.

Cover the spray foam with fire retardant spray.