Duct Repair & Sealing

Leaking ductwork allows heated or cooled air to escape into attics, basements, and wall cavities before it ever arrives at your living spaces. Nextherm HVAC Solutions frequently discovers that homes in Middletown lose up to thirty percent of their conditioned airflow through unsealed joints and uninsulated transitions. This continuous loss forces your furnace or air conditioner to run longer cycles to satisfy the central thermostat, driving up utility bills. Sealing these breaches keeps conditioned air inside the living envelope and significantly lowers your monthly operational costs.

Standard cloth-backed duct tape degrades rapidly under the thermal expansion and seasonal temperature swings typical of Middletown attics and basements. Nextherm HVAC Solutions uses commercial fiber-reinforced mastic paste and UL 181-rated foil tape that bond permanently to galvanized sheet metal and flex duct collars. Mastic remains flexible over decades of heating and cooling cycles, creating an airtight barrier that will not crack, melt, or dry out. This professional sealing method ensures that your duct system maintains its integrity through extreme weather conditions.

When a branch duct disconnects inside a crawlspace or attic, the room supplied by that run will experience a total drop in airflow and fail to match the rest of the house's temperature. In Middletown homes, Nextherm HVAC Solutions often notices that disconnected return ducts suck humid crawlspace air, musty odors, and attic insulation dust directly into the furnace. You may also observe weak airflow at specific registers or hear unusual rushing air sounds behind drywall or beneath subflooring. Our technicians visually inspect and reattach disconnected lines using heavy-duty sheet metal screws and airtight mastic sealing.