Covering Flex Duct With Insulation

Cover the spray foam with fire retardant spray.

Covering flex duct with insulation.

If you want to cover metal ductwork with blown in insulation t hese steps must be followed in this order. Consider adding more insulation as ductwork is farther from the furnace. 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. 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. We offer a range of fiberglass duct wrap solutions that provide traditional sheet metal ducts with improved thermal insulation. Pull insulation and outer liner over the joint and seal to the attached duct or boot with mastic or foil tape figure 5. Add additional sealant if necessary.

The foam provides a vapor barrier so the ductwork won t sweat. 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. 2 cut a piece of foil tape large enough to cover. If there is damage to the metal or flex pipe duct repair it first.

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. Test total duct leakage. This will prevent the penetration of humidity. 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.

Seal all duct joints with foil faced duct tape. Mechanically fasten and mastic seal all duct connections. Cover the metal ductwork with closed cell spray foam. Our duct wrap is available in a variety of densities thicknesses and with or without facings.

How to cover round air ducts with insulation 1. The duct insulation should include a vapor barrier cover. Download brochure pdf v 1540886844000 6 23 mb. 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.

Duct insulation sheets typically used as duct wrap these flexible sheets consist of polyethylene bubbles covered with aluminum polyester foil that prevent 96 of heat from radiating into or away from duct. Use on rectangular and round ductwork. The cost and effort to add more insulation is minimal. If it s uninsulated you should insulated it to at least r 4 to r 8 for dfw.

Apply k flex contact adhesive to the insulation surface and to the duct surface.