Southwest Riverside County & the Temecula Valley
Air Duct Sealing in the Temecula Valley
The air you paid to cool shouldn't be leaking into your attic.
Leaky ducts are a quiet drain — gaps at the joints and small tears let conditioned air escape into the attic instead of reaching your rooms, so the system runs longer and your bill climbs. Those same leaks pull attic dust and allergens into the airstream. We find the leaks on inspection and seal them, so more of what your AC makes lands in the room. It's often the first thing worth ruling out before any bigger duct work.
The leak hunt
Seal the leaks that dump cool air into the attic.
A few loose joints bleed supply air all day; mastic at the boots and joints closes them for good.
Before
- Gaps at joints and boots
- AC runs long to replace lost air
- Attic dust pulled into the return
After
- Joints sealed where air was escaping
- Less waste to the attic
- Supply felt at the vents again
What duct sealing covers
- Mastic-sealed joints and collars — brushed on and cured, not taped over
- Boots, plenum connections, and takeoffs covered — the places leaks actually live
- Supply verified at the registers after sealing, not assumed
- The low-cost first move — ruled in or out before duct repair or replacement
Airflow path
Leak hunt to sealed system
- 1
Duct inspection
We check the attic runs for the leaks where conditioned air is escaping before quoting anything.
- 2
Sealing scope
The joints we'd treat and the price, on paper — and a straight answer if leaks aren't the real problem.
- 3
Seal and verify
We seal the leaks, then confirm improved airflow at the vents. We aim to finish sealing work same-day.
How long does mastic duct sealing last?
Mastic is a brush-on sealant that cures into the joint — it outlasts tape and doesn't peel in attic heat. For the joints we treat it's a one-time fix, not a maintenance item.
Why is there black dust around my supply vents?
Streaking at the register edges usually means air is leaking around the boot and pulling dusty attic air through the gap. Sealing the boot connection stops the streaks at the source — no amount of dusting will.
Will duct sealing lower my energy bill?
It can — leaky ducts bill you twice: once to condition the air, again to replace what escaped into the attic. The more starved the far rooms feel today, the more sealing shows up on the bill. We find the leaks first, then quote the fix.