How do I seal my home's ductwork?
Duct sealing involves locating and sealing leaks in the network of ducts that carries heated and cooled air throughout your home. Use mastic sealant or metal-backed tape (not standard duct tape) on accessible joints and connections. For hard-to-reach ducts, professional aeroseal technology can seal leaks from the inside. Sealing ducts in unconditioned spaces like attics and crawl spaces provides the biggest energy savings.
Why It Matters
Leaky ductwork can waste 20 to 30 percent of your heating and cooling energy, costing you hundreds of dollars each year.
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