Up to 30% of the air your system produces never makes it to your rooms. It leaks out at joints, connections, and gaps — usually into your attic, where it does absolutely nothing for your comfort but everything to your bill.
Overview
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A duct blaster test measures total leakage as a hard number. Most homes test at 20–30% leakage. After sealing, that drops below 10%. You see the before and after side by side.
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The biggest losses happen where duct sections meet boots, plenums, and branch lines. Mastic sealant and metallic tape at these connections stop the majority of air loss in one pass.
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That back bedroom that never cools down? It’s probably at the end of a duct run with leaks upstream stealing its air. Seal those leaks and airflow rebalances — no new equipment needed.
A duct blaster test seals the registers and pressurizes your duct system to measure exactly how much air escapes before it reaches your rooms. Most Texas homes test at 20–30% leakage. This baseline tells us exactly how bad the problem is and where to focus.
Mastic sealant and UL-rated metallic tape go on every accessible joint where duct sections meet boots, plenums, and branch lines. Crushed flex gets reshaped or replaced. Disconnected runs get reconnected. Standard duct tape dries out and fails in a 140°F Texas attic within two years — which is why we don’t use it.
The duct blaster runs again so you see the improvement as a hard number. Then we measure airflow at each supply register to confirm air reaches every room. That back bedroom that never cooled down should be getting its full CFM now.
The goal is a clearer recommendation, a cleaner plan, and the right conversation first.