Whole-home duct cleaning
Dryer vent cleaning
Camera inspection
Sanitizing & deodorizingWhole-system duct and dryer vent check with before-and-after photos - you see exactly what came out of your vents
That "$99 whole-house special" is a bait ad - the real number appears once they are in your hallway, or the "clean" is a shop-vac at the register. We photograph the inside of your ducts before and after instead.
Rotobrush Duct Sealing & Repair: The Santa Clarita Owner’s Guide
Hollis Air Duct Santa Clarita stocks Rotobrush-compatible duct sealing materials and repair components for residential systems throughout the valley, and we install them at a single written price that typically runs between $850 and $2,400 depending on the scope of sealing work and how many access points your system requires. Most homeowners discover they need this work the same way: a room that never quite cools in August, a utility bill that climbed 18% year over year, or an HVAC tech who mentioned “the Rotobrush seal is shot” during a routine check. The part itself isn’t something you see fail – it’s something you feel in the rooms that won’t hold temperature and hear in the ducts that whistle when the blower kicks on.
We’re an independent service provider, not affiliated with Rotobrush, which means we’re free to tell you straight when a genuine Rotobrush part matters and when a quality equivalent does the same job for less. Roy Castellanos has been running this crew long enough to know both calls happen in the same week.
Which Rotobrush Models This Applies To
Rotobrush has put several system generations into the field over the past two decades, and the sealing components don’t all cross over. The clearest way to identify what you’re working with is to find the data plate on your air handler or the label on your brush head carriage. If you have a Rotobrush aiR+ or RotoStorm series, you’re looking at brush-driven sealing that uses a different mastic profile than the older RotoClaw units still running in some Santa Clarita homes built before 2005.
The compatibility gotcha we run into most often in Valencia and Saugus: homeowners replace the brush head but keep the original gasket and sealing collar, and the new head never seats correctly. The measurement that matters is the collar diameter – most residential Rotobrush systems run a 6-inch or 8-inch sealing collar, and guessing wrong means the seal leaks from day one. For the sealing itself, we typically install OEM Rotobrush mastic on Rotobrush brush systems, but we’ll recommend a proven aftermarket mastic from Hardcast or similar when the job is a simple seam re-seal and the OEM part isn’t required to hold warranty. The honest rule we give every customer: if it’s a moving part or a factory gasket, buy the Rotobrush version; if it’s sealing compound on a static joint, an approved equivalent is fine.
Styles & brands we work with
Signs Your Rotobrush Duct Sealing & Repair Is Failing
- Rooms at the end of the run stay warm in summer. The seal at the plenum or trunk line has opened up enough that conditioned air is bleeding into the attic or crawlspace before it reaches those far registers. We see this constantly in newer builds off Tournament Road where the initial install was rushed.
- Dust accumulates fast near register openings. When a Rotobrush seal fails on the return side, the system pulls unfiltered attic air into the loop, and the register grilles show it within a couple of weeks.
- A whistling or hissing sound from the duct chase when the system runs. That’s air moving through a gap the seal used to close. It’s more audible in the quieter hours, and in Santa Clarita’s summer, the system runs enough that you’ll notice it within a day or two.
- Utility costs creep up without a change in usage. A compromised seal means the system runs longer to hit the same setpoint. In a Santa Clarita July, that’s real money – lost conditioned air is lost electricity, and the math shows up within two billing cycles.
- Uneven temperatures between rooms that used to be balanced. One floor or one wing of the house is consistently five or six degrees off. That pattern points to a seal failure at a branch takeoff rather than an equipment issue.
See the difference
Before
After
Before
After
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AfterDIY or Call Us?
You can safely identify the problem yourself: walk the accessible duct runs with a flashlight, look for visible gaps at joints, and feel for air movement with the system running. That’s useful information to have before you call, and it costs nothing. What goes wrong with DIY on Rotobrush sealing is less about danger and more about doing a job that only looks done. Duct sealing mastic has to be applied to a clean, dry surface at the right thickness, and in a Santa Clarita attic in summer, the heat alone makes a proper cure hard for a one-day homeowner project. Most DIY attempts we’ve corrected ran $300 to $600 more than the original fix would have cost, because the half-cured mastic had to be stripped back to clean metal before we started.
If you’re unsure what you’re looking at, call us at (661) 523-0295 and describe what you’re seeing. We’ll tell you over the phone whether it sounds like a seal failure worth booking or something else entirely. Clean ducts move clean air. Everything else is just sales talk.
FAQs
Properly applied Rotobrush-compatible sealing on residential systems in Santa Clarita typically lasts 10 to 15 years before it needs meaningful attention, though the valley’s heat cycles and the dry summer air put more stress on mastic than coastal climates do. What shortens that lifespan faster than anything is a system that wasn’t sealed correctly the first time – a thin coat or a dirty surface can fail in two to three years. Call (661) 523-0295 if you suspect a short-lived seal; we’ll inspect and quote the fix in writing.
Yes, in most cases a failed Rotobrush seal can be repaired rather than fully replaced – if the underlying duct material is sound and the failure is isolated to a seam or takeoff, re-sealing is the right call. Full replacement of the sealing component only makes sense when the material has deteriorated across multiple joints or the brush head itself is worn beyond spec. We won’t sell you more than the job needs; the written quote covers exactly the work required.
A typical Rotobrush duct sealing repair takes four to eight hours on site, depending on how many access points we need to open and how far the failed seal extends. Most single-system jobs in Santa Clarita are done in one day. The full process includes cleaning the joint surfaces, applying the mastic to spec, and letting it cure enough to hold before we pack up.
We stock the common Rotobrush-compatible sealing materials and brush head components on the truck, so most repairs can happen the same day we’re on site; unusual model-specific gaskets or collars may take two to three business days to source. We’ll tell you before we schedule anything. If you want to know whether yours is a stock part, call (661) 523-0295 with your model number and we’ll check our inventory while you’re on the line.
Written by Roy Castellanos, Owner, Hollis Air Duct Santa Clarita at Hollis Air Duct Santa Clarita, serving Santa Clarita and nearby areas.