How to Keep a Dryer Vent Insulated

Wear adequate safety gear before insulating the vent since fiberglass insulation particles are irritants. Proper gear includes work gloves, a dust mask and safety glasses.

Find where the dryer vent hose runs through your home, which is the area that starts behind the wall where the dryer connects and runs to the exterior of the home. This hose location may be inside a ceiling, in an attic or in a crawlspace under the home.

Examine the entire length of vent work and find any seams where two sections connect. Wrap two layers of metal foil tape around the joints to secure them from leaks before you add insulation. Cut the metal foil tape off of the roll using a utility knife.

Walk back to the beginning section of the vent hose and measure the diameter of the hose by wrapping a tape measure around it. Cut strips of fiberglass batting to the same width so they will wrap all the way around the vent.

Wrap the fiberglass insulation strips around the hose until it is 3 inches thick and secure it using more pieces of metal foil tape spaced at 12-inch intervals. Continue wrapping and taping the dryer venting system until you reach where it exits the home or the crawl space.