Ducts are assembled from pieces, and every joint, collar, takeoff and boot is a place air can escape. Years of attic heat dry out old tape, flex gets crushed under stored boxes, and boots pull away from the ceiling.
Most of that can be repaired without replacing the system. We find where the air is going, fix those places and check the airflow afterwards.
Sealing closes the openings where air escapes. On accessible joints that means mastic, a thick paste brushed over every seam, collar and takeoff, sometimes with mesh for larger gaps. Foil tape rated UL 181 handles some connections. Boots get sealed to the drywall from inside the house.
Why people call us for duct repair
- Rooms that never cool or heat
- Visible damage in the attic
- Whistling in the walls
- High bills
$69 diagnostic, credited toward the work
- Leak inspection
- Mastic sealing or section replacement
- Duct wrap check
- Balance and re-test
How a duct repair goes
The technician finds where the air is going: disconnected runs, crushed sections, failed tape and loose boots. You get a written price for what gets fixed before any work starts.
Seams, collars and takeoffs get mastic. UL 181 foil tape goes where it suits. Sections where the material has failed are replaced rather than patched.
Airflow at the registers is checked before and after. If a $69 diagnostic visit found the problem, it is credited toward the work. Our labor carries a one-year warranty.
We repair, maintain and install these brands. Logos identify the equipment we work on and do not imply endorsement by the manufacturer.
Before you call
Why the old tape failed
Cloth-backed tape was the standard for decades. Summer after summer of attic heat dries the adhesive out and it lets go. Any tape used on ducts now should be foil tape marked UL 181, and most joints are better off with mastic. Read more
Dust that keeps coming back
A leak on the return side pulls dusty attic air into the system, past the filter, and blows it out of the registers. Cleaning the ducts does not fix that. Sealing the leak does. Read more
What a real duct job includes
Sealing every joint, collar and boot, replacing crushed or failing runs, and fixing the return if it is starved. A vacuum in a register is not a duct improvement, whatever the flyer says. Read more
Where the energy goes
The Department of Energy puts typical duct losses at 20 to 30 percent. In an attic that loss is paid for twice: once for the air that escapes, once for the heat the rest picks up on the way. Read more
Sealing does not fix design
Undersized runs, crushed flex along its length, thin insulation throughout, or a layout that never served the back bedroom are replacement problems. Sealing those gives you a tight system that still does not work. Read more
Often part of the same job
Common questions
One room that never matches the rest, dust that comes back days after you clean, and a system that runs longer every summer. Nothing sounds broken, which is why leaks go unnoticed for years. Read more
Closing the openings where air escapes. On joints you can reach, that means mastic, a thick paste brushed over every seam, collar and takeoff, sometimes with mesh for larger gaps. Foil tape rated UL 181 handles some connections. Boots get sealed to the drywall from inside. Read more
No. Cloth-backed tape is what failed in the first place: attic heat dries out the adhesive and it lets go. Tape used on ducts should be foil tape marked UL 181, and most joints are better off with mastic.
When the ducts are undersized, the flex is collapsing along its length, the insulation is thin throughout, or the layout never served part of the house. Sealing those gives you a tight system that still does not work. Read more
$69, told to you before you book. It covers the visit and a written quote, and it is credited toward the work if you go ahead.
Usually within a few hours. We are open 6am to 10pm, seven days.
Yes. For permitted equipment changeouts California requires the existing ducts to be tested and to pass a leakage limit, verified by an independent rater. Outside a changeout, the same test tells you whether sealing was worth it, before and after.
“Amazing Professional And quick service the AC technician Jonathan arrived same day one hour after he called … He replaced the filters clean the Coils … Our AC never was Cold like this and the airflow is amazing”
Schedule service
Fill in the form or call. We are on the phones 6am–10pm.
818-277-5056Licensed #1119892 · Veteran-owned · Pasadena & Reseda