Duct Sealing & Leak Repair

Stop Cooling Your Attic

Leaky ducts are more than just a waste of money—they pull dusty, hot attic air into your living spaces and force your HVAC unit to work twice as hard. Working Class HVAC uses advanced detection methods to find every leak in your system and seals them with professional-grade materials.

Duct Sealing Solutions:

• Mastic Sealing: A fiber-reinforced sealant that provides a permanent, flexible seal on all joints.
• Duct Tape Replacement: Standard duct tape fails in attic heat. We use UL-rated foil tapes.
• Boot Sealing: Sealing the gap between your drywall and the register for zero loss.
• Disconnected Run Repair: Reattaching ducts that have come loose over time.