Ductwork Sealing and Repair — Stop Losing Heat to the Attic
Leak testing, sealing, crushed flex replacement and air duct cleaning
Ductwork sealing and repair fixes the leaks, disconnected runs and crushed flex duct that let heated or cooled air escape into attics and crawlspaces before it reaches your rooms. In older Antelope Valley and Santa Clarita Valley homes, leaky ducts commonly waste a large share of the air your system produces, which shows up as uneven rooms, dusty registers and higher bills. DC Air and Heating measures static pressure, locates leaks, re-seals connections with mastic, replaces damaged runs, and can pair the work with air duct cleaning. Where California Title 24 requires it, duct leakage testing is completed with HERS verification. Call (661) 310-3340.
Key Facts
- Static pressure and airflow measured before and after
- Mastic sealing of plenums, boots and joints
- Crushed or torn flex duct replaced
- Disconnected runs reconnected and strapped
- Air duct cleaning available on the same visit
- Title 24 / HERS duct testing coordinated where required
| Sign | Likely duct problem |
|---|---|
| One room always colder | Disconnected or crushed run |
| Dust around registers | Return leak pulling attic air |
| Weak airflow at far rooms | Undersized or kinked flex duct |
| High bills, system runs long | Supply leaks into attic |
| Whistling at registers | High static pressure |
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Areas we serve
Dispatched from our Quartz Hill shop to the Antelope Valley, Santa Clarita Valley, north San Fernando Valley and Kern high desert.
- Lancaster
- Palmdale
- Quartz Hill
- Santa Clarita
- Valencia
- Canyon Country
- Newhall
- Saugus
- Stevenson Ranch
- Castaic
- Acton
- Agua Dulce
- Littlerock
- Pearblossom
- Lake Los Angeles
- Sun Village
- Leona Valley
- Lake Hughes
- Green Valley
- Antelope Acres
- Rosamond
- Willow Springs
- Mojave
- California City
- Edwards AFB
- Tehachapi
- Sylmar
- San Fernando
- Granada Hills
- Porter Ranch
- Northridge
- Chatsworth
- Van Nuys
- Phelan
- Pinon Hills
- Wrightwood
Frequently Asked Questions
How do I know if my ducts need sealing?
Uneven rooms, dust around registers, rooms that never reach temperature and high bills are the usual signs. A static pressure and airflow test confirms it.
Is duct sealing the same as air duct cleaning?
No. Cleaning removes dust and debris inside the ducts; sealing closes the leaks in the ductwork itself. Many homes benefit from both, and we can do them together.
Do you repair mobile home underbelly ducts?
Yes — see our mobile home HVAC repair page for crossover and underbelly duct repair.
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