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.

How to insulate sheet metal ductwork.

Wrap metal duct tape around any seams you see in the ducts. Choose a faced fiberglass. Foil backed self adhesive foam duct insulation. Richard trethewey helps a homeowner insulate his ductwork.

You can fasten and secure the ends of the batts with duct tape but that may cause the insulation to get spoiled. Check the speed of the blower motor on the furnace. 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.

Use a paintbrush to apply duct mastic to the joints where an elbow. See below for a shopping list tools and steps subscribe to this old house. Press a continuous strip of foil tape to all longitudinal seams along straight runs of duct. Installs easily and wraps around irregular ductwork areas well.

Like any other insulation use additional layers to provide better insulation power. Protect yourself from itchy fibers when working with fiberglass insulation. If necessary switch the wires to reduce the blower to its lowest. To fit your ducts simply cut the sleeve to length with a sharp pair of scissors.

Insulating hvac ductwork when insulating hvac ductwork use a foil faced fiberglass insulation with an r 6 or higher r value. Use the type of metallic foil duct tape recommended by the insulation manufacturer to seal and hold the insulation in place. How to insulate sheet metal ac ducts 1. 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. Be sure to seal any rips or punctures in the vapor barrier with tape so no moisture can get in. Wear work gloves long sleeves and long.