How To Insulate Sheet Metal Ductwork

Protect yourself from itchy fibers when working with fiberglass insulation.

How to insulate sheet metal ductwork.

Wrap metal duct tape around any seams you see in the ducts. Press a continuous strip of foil tape to all longitudinal seams along straight runs of duct. How to insulate sheet metal ac ducts 1. Use the type of metallic foil duct tape recommended by the insulation manufacturer to seal and hold the insulation in place.

Foil backed self adhesive foam duct insulation. Like any other insulation use additional layers to provide better insulation power. Go to the basement or crawl space of your home. Check the speed of the blower motor on the furnace.

Richard trethewey helps a homeowner insulate his ductwork. The 36 wide rolls are great for insulating sheet metal duct runs and the 9 wide rolls are great for insulating fittings. Make sure you seal all of the ductwork joints you had left unsealed in order to. You can fasten and secure the ends of the batts with duct tape but that may cause the insulation to get spoiled.

Therefore mechanical fasteners are more advisable for usage than duct tape. Simply unroll the fiberglass and wrap around the duct in a spiral fashion making sure to overlap the ends at least 1 to make sure that all of the exposed metal is covered. Insulating hvac ductwork when insulating hvac ductwork use a foil faced fiberglass insulation with an r 6 or higher r value. To fit your ducts simply cut the sleeve to length with a sharp pair of scissors.

See below for a shopping list tools and steps subscribe to this old house. Wear work gloves long sleeves and long. Installs easily and wraps around irregular ductwork areas well. If necessary switch the wires to reduce the blower to its lowest.

Make sure the foil surface of the insulation is free of dust before applying the tape. Lastly buy hollow core foam insulation which is easy to install as it self seals and works best with long lengths of pipe. Be sure to seal any rips or punctures in the vapor barrier with tape so no moisture can get in.