Do-It-Yourself Home Duct Sealing Requires The Right Tools

As leading San Mateo HVAC installation and repair professionals, we recommend that homeowners consider getting their ducts cleaned on occasion; however, we also know that there may come a time when you need to seal your ductwork, a job that many homeowners can do themselves. What we want you to know is that to do it properly, you need the right tools – and standard duct tape isn’t one of them.

Why? Because it is not resistant to heat, duct tape tends to shrink, peel, and dry out almost immediately after it has been applied. So, what should you use when sealing the ductwork in your San Mateo or Bay Area home? Water-based mastic, a product available at nearly any home improvement or hardware store. Also, when shopping for mastic, look for one with a UL 181 rating for best results. Mastic’s consistency makes repairing small tears and rips simple, and its consistency makes application to joints easy as well.

When you’re ready to seal your ductwork, be sure to wear old clothes as this is one messy and dirty job. You’ll also want to grab an old paintbrush and a trowel for best results.

Here is how to do it:

  • All tears, rips or joints should be thoroughly cleaned to remove dirt, dust, and other debris
  • Secure all joints with metal screws
  • Work mastic into holes and cracks to ensure the area is completely covered
  • Reinforce openings which are larger than 1/4″ with mesh before applying the mastic

There are various types of duct tape that some do-it-yourselfers believe works “good enough” for the job, such as those made with butyl and polypropylene; however, none of these options work as well as mastic.

Sealing your ductwork is a job that’s relatively easy, but you may encounter problems that you cannot easily access yourself; this is when you should contact your San Mateo HVAC contractor for assistance.

Have questions about sealing your ductwork, or considering having your ducts cleaned? Call the professionals at Ortiz Heating & Air Conditioning today. We’re always happy to help!