The cost and effort to add more insulation is minimal.
Covering flex duct with insulation.
Download brochure pdf v 1540886844000 6 23 mb.
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.
If you want to cover metal ductwork with blown in insulation t hese steps must be followed in this order.
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.
If there is damage to the metal or flex pipe duct repair it first.
How to cover round air ducts with insulation 1.
2 cut a piece of foil tape large enough to cover.
Mechanically fasten and mastic seal all duct connections.
Apply k flex contact adhesive to the insulation surface and to the duct surface.
We offer a range of fiberglass duct wrap solutions that provide traditional sheet metal ducts with improved thermal insulation.
Add additional sealant if necessary.
The duct insulation should include a vapor barrier cover.
Cut a second length of standard insulation batt to the length of the horizontal duct to cover the duct s underside.
This will prevent the penetration of humidity.
Clear away clutter that blocks your access to the air ducts.
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.
Pull insulation and outer liner over the joint and seal to the attached duct or boot with mastic or foil tape figure 5.
Install loose fill insulation to cover the ducts and the attic floor to meet or exceed the code required r value for attic insulation.
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.
Test total duct leakage.
The foam provides a vapor barrier so the ductwork won t sweat.
In some cases the insulation is flex board which itself is the pipe or duct.
Seal all duct joints with foil faced duct tape.
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.
Use on rectangular and round ductwork.
Consider adding more insulation as ductwork is farther from the furnace.
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.
Cover the metal ductwork with closed cell spray foam.
