Check and Seal HVAC Ductwork
Inspect visible ductwork for leaks or disconnections that waste energy.
DIY Cost
$50
If Ignored
$600
Frequency
Twice a year
Difficulty
Moderate DIY
Some experience helpful. Plan 2–4 hours and watch a tutorial first.
How to do it — step by step
Inspect all visible ductwork in your basement, attic, or crawl space. Look for gaps, disconnections, or sections that feel warm when AC is running. Seal leaks with HVAC-approved mastic sealant or metal-backed tape (not regular duct tape). Leaky ducts can waste 20–30% of your conditioned air, significantly raising energy bills.
Recommended tools & supplies
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