Ductwork & Airflow Services, Georgetown TX
Duct Repair & Construction
Repair disconnected, damaged, or collapsed duct sections. Restore airflow to rooms losing conditioned air.
Professional duct sealing with mastic or foil tape, eliminate air leaks that waste conditioned air in attic and crawlspace.
New duct system design and installation for additions, renovations, or full system replacement.
Custom fabrication of sheet metal trunk lines, branches, and fittings for high-performance duct systems.
Splice and reconnect flex duct sections, replace damaged sections, and correct improper flex duct installations.
Custom supply plenum fabrication for equipment replacements where the new unit requires a different plenum configuration.
Repair leaking or damaged return air plenums that allow unconditioned attic air to enter the system.
Applied mastic sealing for all duct joints and connections, the most durable sealing method for Georgetown's attic conditions.
Seal duct boots at registers where leakage directly into walls or ceilings causes significant energy loss.
Airflow Balancing
Measure and balance air distribution across all supply and return vents for even comfort throughout the home.
Comprehensive whole-house airflow evaluation and adjustment, dampers, registers, and duct sizing evaluated.
Balance airflow to specific problem rooms that receive too much or too little conditioned air.
Adjust zone dampers and control settings for homes with zoning systems to improve comfort and efficiency.
Full optimization of multi-zone airflow systems, control logic, damper travel, and zone sizing.
Optimize how conditioned air is distributed throughout the duct system for efficiency and comfort.
Improve overall air movement in the home through duct, register, and equipment adjustments.
Undersized return air is the most overlooked duct problem, we measure and correct return air flow.
Expand or add return air drops to improve system static pressure and airflow in homes with insufficient return capacity.
Dampers & Registers
Install manual balancing dampers in branch ducts to control airflow to specific zones or rooms.
Repair or replace motorized zone dampers that are stuck open, stuck closed, or not responding to controls.
Replace damaged, rusted, or improperly sized floor registers and diffusers.
Replace ceiling supply and return grilles with correct sizing and airflow direction for your room layout.
Install transfer grilles to improve pressure equalization and airflow between rooms with closed doors.
Install jump ducts above doorways or through walls to allow air pressure equalization between zones.
Redirect or baffle supply vents that blow directly on occupants or create drafty areas.
Measure and calibrate airflow from each vent against design specifications.
Ventilation & Testing
Repair ERVs, HRVs, exhaust fans, and dedicated ventilation systems.
Improve fresh air exchange and indoor air quality through targeted ventilation upgrades.
Measure system static pressure to identify duct restrictions causing equipment stress and efficiency loss.
Isolate duct sections from structure to eliminate vibration noise that transmits through walls and ceilings.
Install internal duct lining to absorb noise from high-velocity air movement in ducts near occupied spaces.
Duct Insulation & Protection
Install or replace duct insulation in Georgetown attics where heat gain from uninsulated ducts wastes significant energy.
Install vapor barriers to prevent condensation on cold supply ducts in Georgetown's humid summers.
Support or repair duct systems during crawlspace encapsulation projects.
Repair small-diameter high-velocity duct systems found in older homes and historic properties.
How We Diagnose and Fix Sealing Failures
Mastic is a water-based, paint-like sealant that goes on wet with a brush and cures into a flexible, permanent seal over duct seams and joints. Unlike tape, which is a mechanical bond that can peel or dry out, mastic chemically adheres to the metal or duct board surface and remains flexible through decades of thermal expansion and contraction, which is exactly what happens to ductwork sitting in an attic that swings from cool mornings to 150 degree afternoons in summer. This is why mastic is the sealing method specified in most energy code requirements for duct sealing and why we default to it at every metal-to-metal connection, boot, and plenum seam we work on.
The application process matters as much as the material choice. We clean the seam surface of dust and loose debris before application, since mastic bonds poorly to a dirty surface, and apply it thickly enough to bridge small gaps, roughly the thickness of a nickel, rather than a thin cosmetic coat that cracks under the first thermal cycle. For gaps wider than about a quarter inch, we embed fiberglass mesh tape into the mastic before it cures, which the mastic alone cannot bridge reliably on its own. We diagnose sealing failures by looking for the telltale signs of degraded mastic, chalky or cracked surface texture, visible daylight or airflow at a seam, and a static pressure reading at the equipment that is higher than expected for the system's design, which points to restriction, or air handler amp draw that is lower than rated, which can indicate the blower is moving less air than it should due to leakage bypassing the intended path.
Older mastic applications, particularly ones from before the mid-2000s when sealing standards tightened, sometimes used a thinner formulation that has since dried out and cracked at the seams, especially in Georgetown attics that see more thermal cycling than a shaded northern climate. When we find failed mastic from a previous job, we do not simply add a new coat over the cracked material, we remove the loose and cracked sections first so the new mastic bonds to clean metal rather than to failing old sealant. A full mastic sealing pass on an average residential duct system runs 250 to 600 dollars, and every job includes sealing the return plenum and boot connections, not just the visible trunk line seams, since those are consistently where we find the largest leaks.
Frequently Asked Questions, Mastic Duct Sealing
Uneven Comfort or High Energy Bills?
Ductwork problems are often the hidden cause. We diagnose and fix them.