How To Insulate Sheet Metal Ductwork

How to insulate sheet metal ac ducts 1.

How to insulate sheet metal ductwork. You can fasten and secure the ends of the batts with duct tape but that may cause the insulation to get spoiled. Richard trethewey helps a homeowner insulate his ductwork. Press a continuous strip of foil tape to all longitudinal seams along straight runs of duct. Protect yourself from itchy fibers when working with fiberglass insulation.

Use the type of metallic foil duct tape recommended by the insulation manufacturer to seal and hold the insulation in place. To fit your ducts simply cut the sleeve to length with a sharp pair of scissors. If necessary switch the wires to reduce the blower to its lowest. See below for a shopping list tools and steps subscribe to this old house.

Installs easily and wraps around irregular ductwork areas well. Foil backed self adhesive foam duct insulation. Go to the basement or crawl space of your home. If you are installing preformed insulation disconnect an elbow place a plastic cap over the end of the duct and slide.

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. Therefore mechanical fasteners are more advisable for usage than duct tape. Lastly buy hollow core foam insulation which is easy to install as it self seals and works best with long lengths of pipe. Use a paintbrush to apply duct mastic to the joints where an elbow.

Make sure you seal all of the ductwork joints you had left unsealed in order to. The 36 wide rolls are great for insulating sheet metal duct runs and the 9 wide rolls are great for insulating fittings. Wear work gloves long sleeves and long. Wrap metal duct tape around any seams you see in the ducts.

Choose a faced fiberglass. Insulating hvac ductwork when insulating hvac ductwork use a foil faced fiberglass insulation with an r 6 or higher r value. Check the speed of the blower motor on the furnace.