Duct Sealing & Insulation

Why Duct Sealing & Insulation Matters

Ductwork is rarely airtight by default, and small gaps at joints and connections add up over the length of a full system. Every gap is conditioned air escaping into an attic, crawlspace, or wall cavity instead of reaching your living space, which means your HVAC system has to run longer and harder to hit the same temperature. Sealing those leaks, combined with insulating ducts that run through unconditioned areas, keeps more of the air you're paying to heat or cool actually where you want it.

When You Might Need This

• You can hear whistling or hissing near duct joints or connections
• Ductwork runs through an uninsulated attic, crawlspace, or garage
• Your energy bills have been climbing without an obvious reason
• Some rooms take noticeably longer to heat or cool than others

What Happens During Duct Sealing & Insulation

We inspect accessible duct joints and connections for leaks, using smoke or pressure testing where helpful to find gaps that aren't obvious by eye. We seal those leaks with mastic sealant or foil tape rated for ductwork — not standard duct tape, which breaks down over time — and add or upgrade insulation on any runs passing through unconditioned space. The goal is simple: air that leaves your unit at the right temperature should arrive at your vents at that same temperature.