Air Duct Sealing Dallas TX

Your duct system has dozens of joints. Every place a duct meets the plenum, a collar, an elbow or a register boot is a spot where air can escape. When those joints leak on the supply side, cooled air spills into the attic. When they leak on the return side, the system pulls hot, dusty attic air into the house. Either way you pay to heat and cool air you never feel.

Signs Your Ducts Are Leaking

Leaks hide above the ceiling, but they leave clues: rooms that never get comfortable while others are fine; weak airflow at some vents; high energy bills in summer and winter; dust that returns fast after cleaning; a hot or stuffy attic smell when the system starts; and an AC that runs longer than it used to. Our air flow service measures what each vent delivers, so you are not guessing.

Where Ducts Leak in Dallas Homes

Most North Texas homes run flex duct through the attic. The leaks we find most often are at the plenum connections next to the air handler, the collars where each flex run starts, and the boots where the duct meets the ceiling vent. Summer attic heat dries out old tape until it lets go. A cable installer or a storage box can also knock a run loose. We found a leaking run on a job near Cottonwood Park, written up in our Richardson duct repair project.

Mastic and Foil Tape: How the Sealing Is Done

Our service is hand sealing. The technician brushes mastic, a thick sealant paste, over each leaking joint and seam. Mastic cures into a flexible seal that holds up to attic heat. Where tape is the right fix, we use foil-backed tape made for ductwork, not the gray cloth duct tape from the hardware store. Loose runs are pulled back onto their collars and fastened before they are sealed. Aerosol sealing, which is sprayed through the ducts from the inside, is a different method. Ours is done by hand at each leak, and you see photos of every one.

Seal First, Then Clean

If the ducts leak, a cleaning does not last. The return side keeps pulling attic dust in through the gaps. That is why we look for leaks during the inspection and recommend sealing before a full air duct cleaning. Sealing fixes the airflow. Cleaning then clears out what the leaks let in.

Air Duct Sealing Cost in Dallas

We quote duct sealing in writing after the inspection, because the price depends on what we find: how many leaks there are, where they sit, how easy the attic is to work in, and whether any run is too damaged to seal. You see photos of every leak and a line for each repair before you approve anything. A house with many leaks or damaged runs costs more than a house with two loose collars, and that is fair. The sign of an honest quote is documented scope, not a small number.

A cheap patch with the wrong tape costs more in the end. It fails in the next hot summer, the leak comes back, and you pay twice. Our trained technicians use the right materials and check the airflow when the work is done.

When Sealing Is Not Enough

Sealing fixes leaks at joints and seams. It cannot fix a duct that is crushed, torn open or soaked. Those runs need duct repair or duct replacement. We tell you which one you need, with photos, before any work starts.