How To Insulate Sheet Metal Ductwork

Choose a faced fiberglass.

How to insulate sheet metal ductwork.

If you are installing preformed insulation disconnect an elbow place a plastic cap over the end of the duct and slide. Lastly buy hollow core foam insulation which is easy to install as it self seals and works best with long lengths of pipe. 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.

Wrap metal duct tape around any seams you see in the ducts. Therefore mechanical fasteners are more advisable for usage than duct tape. Go to the basement or crawl space of your home. Like any other insulation use additional layers to provide better insulation power.

You can fasten and secure the ends of the batts with duct tape but that may cause the insulation to get spoiled. Press a continuous strip of foil tape to all longitudinal seams along straight runs of duct. To fit your ducts simply cut the sleeve to length with a sharp pair of scissors. Make sure the foil surface of the insulation is free of dust before applying the tape.

Be sure to seal any rips or punctures in the vapor barrier with tape so no moisture can get in. Protect yourself from itchy fibers when working with fiberglass insulation. Richard trethewey helps a homeowner insulate his ductwork. Installs easily and wraps around irregular ductwork areas well.

Check the speed of the blower motor on the furnace. See below for a shopping list tools and steps subscribe to this old house. Use the type of metallic foil duct tape recommended by the insulation manufacturer to seal and hold the insulation in place. If necessary switch the wires to reduce the blower to its lowest.

How to insulate sheet metal ac ducts 1. Make sure you seal all of the ductwork joints you had left unsealed in order to. Foil backed self adhesive foam duct insulation.