Whole-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.
Fast, Reliable Duct Sealing Across Pine Hills
Duct sealing in Pine Hills typically runs $450 – $1,200 for a whole-home system, and most jobs are completed in a single visit. If your utility bills keep climbing, rooms stay hot and sticky no matter what the thermostat says, or you smell mildew every time the AC kicks on, your ductwork is likely leaking conditioned air into the attic and pulling attic air back into your living space.
We serve Pine Hills from our Miami dispatch office, with crews that know the difference between a 1962 concrete-block ranch off Silver Star Road and a 1970s wood-frame duplex near Pine Hills Road. We also offer Pine Hills Dryer Vent Cleaning. That matters because the duct problems we find in Pine Hills are specific to this unincorporated Orlando suburb: original galvanized and early-flex ductwork baked brittle in 140°F attics, rodent damage from the wooded lots, and no municipal code to enforce minimum standards. When you call (361) 326-5060, a live person answers, and we’ll give you a written price before any work starts.
Why Hollis Air Duct Cleaning Is Pine Hills’s Preferred Duct Sealing Company
Hollis has been part of the Garrison Partners family since 2004. We don’t compete on teaser coupons. We compete on showing up inside the window, pricing in writing, and leaving the site clean. That’s The Garrison Standard, and it applies to every job in Pine Hills.
Our technicians are background-checked and uniformed. You know who’s walking into your home before they arrive. And every repair we make is backed by our 365-Day Done Right Promise: if the work fails within a year, we come back and make it right at no charge, including a free second visit. No negotiation, no runaround.
Phones are answered by a live person 24 hours a day, 7 days a week. No voicemail loops, no callback queues, no waiting until Monday to schedule. For Duct Sealing in Pine Hills, that responsiveness matters when your AC is pumping humidity and musty air through a compromised system.
We know the local roads, the older housing stock, and the specific failure modes that repeat in this market. That local knowledge saves time and prevents callbacks.
Duct Insulation in Pine Hills
Duct Insulation in Pine Hills is often the missing half of a sealing job. In this unincorporated Orlando suburb, many homes were built in the 1950s – 1970s with original flex duct or galvanized metal runs strung through unconditioned attics. Those attics hit 140°F on a routine summer afternoon. Without proper insulation, even a sealed duct bleeds cooled air into the attic before it reaches your rooms, and the temperature differential creates condensation that feeds mold growth inside the line.
A typical duct insulation project in Pine Hills runs $350 – $800 depending on linear footage, accessibility, whether we’re reinsulating existing runs or wrapping newly sealed replacement sections. We use professional-grade materials from Honeywell and Abatement Technologies, not hardware-store wrap that degrades in two seasons.
When Insulation Fails in Local Attics
The fiberglass wrap on older Pine Hills ducts often crumbles to dust when you touch it. We’ve pulled insulation off galvanized runs near Clarcona-Ocoee Road that was literally baked into shards. We replace it with foil-faced, closed-cell insulation rated for high-temperature attic exposure, sealed at every seam with mastic.
Condensation and Mold Prevention
Central Florida humidity means cold air inside a duct plus hot attic air outside equals water on the metal. That water feeds mildew that blows straight into your living space. Proper insulation eliminates the surface temperature difference, so the moisture never forms.
HVAC Duct Sealing in Pine Hills
HVAC Duct Sealing in Pine Hills addresses the leaks, separations, and rodent damage that waste 20 – 30% of conditioned air in a typical older home here. The job involves pressurizing the system to locate leaks, then sealing joints, connections, and damaged sections with mastic and reinforced mesh, not foil tape that peels off in the heat. For a whole-home seal on a single-story Pine Hills ranch, expect $450 – $1,200 depending on duct length, accessibility, and whether we need to replace chewed or collapsed sections.
We use Nikro negative-air equipment and Rotobrush rotary systems to clean and prepare the duct surface before sealing. Sealing over dust and biofilm is a waste of money; the mastic won’t bond properly.
Pressure Testing Before and After
We measure static pressure at the air handler before we start and after we finish. You see the number drop. That’s how you know the seal worked, not just that someone smeared mastic around and left.
Return-Side Sealing
Most contractors focus on supply ducts and ignore the return path. In Pine Hills, we regularly find return plenum leaks at the air handler cabinet pulling attic dust, insulation fibers, and rodent droppings into the system. We seal both sides, or we don’t take the job.
Trusted Brands We Service in Pine Hills
Our Duct Sealing crews carry professional-grade equipment from Rotobrush and Nikro, plus filtration and insulation products from Honeywell, Aprilaire, and Abatement Technologies. These are the same tools commercial HVAC contractors use in hospitals and schools, not hardware-store gear. For Pine Hills homeowners, that means we stock the right mastic, mesh, and insulation diameter for your original 1950s – 70s ductwork without waiting on a parts run to Orlando. Fast turnaround matters when your attic is 140°F and your AC is running 18 hours a day.
Common Duct Sealing Problems We See in Pine Hills Homes
- Foil tape over separated galvanized joints. A previous handyman or low-bid contractor slapped foil tape on a joint that had already pulled apart from 50 years of thermal cycling. The tape looks fine in January and blows open the first 140°F afternoon in June. We find this repeatedly in mid-century ranch homes near Pine Hills Road and Silver Star Road.
- Rodent re-entry after quick patches. Squirrels and roof rats from the wooded lots surrounding Pine Hills neighborhoods chew through flex duct inner liners for nesting material. Seal the hole without finding and blocking the entry point, and you’ll be sealing it again in six months. We inspect soffits, eave gaps, and attic vents as part of the job.
- Return-side leaks left untouched. The return plenum at the air handler pulls unfiltered attic air straight into your system. Homeowners blame a dirty filter, but the real problem is a gap between the return box and the cabinet. We seal these with sheet metal and mastic, not tape.
- Collapsed flex duct buried under blown insulation. In Pine Hills attics, decades of additional insulation bury original flex runs. The weight collapses the inner liner, choking airflow to back rooms. We locate these with camera inspection, replace or support the run, then seal and reinsulate.
Pricing for Duct Sealing in Pine Hills, FL
Whole-home duct sealing in Pine Hills typically costs $450 – $1,200. Duct insulation runs $350 – $800. Combined sealing and insulation on an older ranch home usually falls between $700 and $1,600.
What moves the number: linear footage of ductwork, attic accessibility (tight truss spaces take longer), whether we’re sealing existing runs or replacing rodent-damaged sections, and whether the return plenum needs reconstruction. We do not price per vent. We price per system, in writing, before any work starts. The price does not move at the door.
Every estimate is free. Call (361) 326-5060 to schedule.
We Also Serve Cities Near Pine Hills
Hollis crews work throughout Central and North Florida, including Pine Hills, Jacksonville, Miami, Tampa, and Orlando. Dispatch and scheduling are coordinated from our Miami office, with local technicians serving each metro area.
Serving Pine Hills, FL - Our Local Coverage Area
We’re based in the Pine Hills area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About Duct Sealing in Pine Hills
Every 5 – 7 years for a full inspection, sooner if you notice hot rooms, rising bills, or musty odors. The original galvanized and early-flex ductwork in Pine Hills was never designed for 60+ years of 140°F attic cycling, and thermal expansion keeps working joints loose. Call (361) 326-5060 and we’ll camera-inspect the full run to see what’s shifted.
Yes. Unpaved roads and open land near Pine Hills load the air with fine dust and pollen that your HVAC system pulls in through return-side leaks. If you’re dusting every other day, your return duct is likely sucking attic air through gaps at the plenum or chewed flex sections. Sealing the return path cuts that infiltration significantly.
Yes, we seal ductwork on detached structures, though we evaluate whether the system is worth sealing versus replacing. Outbuilding ducts in Pine Hills often use even older materials and may lack proper insulation for unconditioned attic runs. We’ll give you an honest assessment and a written price either way.
Power outages stop the AC but leave humidity inside the ductwork. With Pine Hills’s year-round heat and the moisture from summer thunderstorms, that stagnant humid air breeds mold in 24 – 48 hours. If your ducts already had small leaks, the outage concentrated moisture at those points. Sealing eliminates the pockets where condensation collects and microbial growth takes hold.
A real job includes camera inspection of the full system, pressure testing before and after, mastic and mesh on every joint (not foil tape), sealing of both supply and return sides, and replacement of rodent-damaged or collapsed sections. A quick patch is tape over a single visible leak with no inspection of what’s hidden behind the insulation. In Pine Hills’s unincorporated market with no municipal code, you’re on your own to tell the difference. Ask for the pressure numbers. Call (361) 326-5060 for an exact quote – estimates are free.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Pine Hills since 2004.




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