Seal Ducts

Written by Courtney Salinas
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Sealing all possible leaks in your ductwork is very important. Because all your heating and air conditioning travels through these ducts, any leaks can cause energy loss, wasting your money and polluting the Earth through needless energy use. Our power grids are almost at peak capacity on the hottest days of the year. If everyone sealed all their leaky ductwork, the strain on our power grids would be lessened.

The ductwork in one out of every three homes is completely disconnected at some point in the system. This means you could be spending a lot of money every year heating your attic or crawlspace. Leaky ductwork can also cause bad air quality. Think of where your ductwork runs. Usually in the attic or crawlspace, both very dusty areas, and sometimes into the garage, which is often filled with household chemicals, fertilizers or paints. Leaks in your ductwork can bring that contaminated air into your home.

How to Tell If Your Ductwork Has Leaks

One of the first indications of leaky ductwork is varying room temperatures. If the living room and the bedroom seem to have considerably different temperatures, there's probably something amiss in your ductwork. In order to determine the source of the leak, start with a visual inspection.

Check your ductwork for any visual signs of wear and tear. Sealing connections with duct tape is not a permanent solution to leaky ductwork, so use duct sealing mastic, a thick paste that provides a permanent seal for about $10 a gallon. Many companies that provide duct sealing can also perform a duct diagnostic check for a nominal fee.


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