Aeroseal Duct Sealing in Mississauga

Mississauga is home base for Duct Sealing GTA, so we’re never far away. If you’ve got weak airflow in some rooms, uneven room temperatures between floors, or an AC that can’t keep the bedrooms cool, leaky ducts are worth ruling out before you replace any equipment.

We measure your duct leakage, fix the accessible gaps by hand, seal the rest from the inside with Aeroseal, then measure again. You keep the Aeroseal Seal Certificate with both numbers on it.

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A recent Mississauga job: Erin Mills

We recently sealed the ducts in a home in Erin Mills. Before sealing, the duct leakage measured 43%. After sealing, it measured 3.7%.

In plain words: most of the air that was escaping through leaks in the ductwork now reaches the rooms instead. The leakage left is less than a tenth of where it started.

These are measured numbers, not estimates. We test before we start and again after sealing, and every Aeroseal job ends with a Seal Certificate showing both. We only share the neighbourhood, never our customers’ addresses.

43%Duct leakage before sealing

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3.7%Duct leakage after sealing

View into a sheet-metal duct opening through a blue Aeroseal-branded connection sleeve — Erin Mills, Mississauga: looking into the ductwork through the Aeroseal injection sleeve.

Clear Aeroseal injection tube running across a finished basement into the mechanical room, with a laptop running the Aeroseal software in the foreground — The setup in the Erin Mills basement. Sealant travels through the clear tube into the duct system while the Aeroseal software monitors the sealing.

Neighbourhoods we cover

All of Mississauga: Port Credit, Mineola, Lorne Park, Clarkson, Erin Mills, Meadowvale, Lisgar, Streetsville, Churchill Meadows, Cooksville, Applewood, Malton, Hurontario and City Centre.

Mississauga homes and their ducts

1970s–90s two-storeys in areas like Erin Mills, Meadowvale and Applewood often have long duct runs to the upstairs bedrooms. Leaks along the way leave less air for the far rooms.
Townhouses with ducts boxed into tight bulkheads and floor cavities.
Newer homes in Churchill Meadows and Lisgar, where joints can still leak even though the house is newer.
Condos: Aeroseal only applies if your unit has its own ducted system. Many condo towers use fan coils with very short or no duct runs. Send us a photo of your mechanical closet and we’ll tell you honestly whether it’s worth it.

How it works

Test first. We measure your duct leakage before we start.
Fix what’s reachable. Accessible gaps and loose connections get sealed or repaired by hand.
Seal from the inside. The Aeroseal machine sends sealant mist through the ducts, and it closes the leaks from within.
Test again. We measure the leakage after sealing.
Seal Certificate. You get the before and after numbers in writing.

Most homes take about 4 hours for sealing, or about 6 hours with air balancing. See the full process →

What Aeroseal can’t fix

Aeroseal seals gaps up to about 5/8 inch. Bigger holes and disconnected ducts get repaired by hand first, and we’ll tell you before doing any extra work. It’s not duct cleaning, and it won’t make an undersized furnace or AC bigger. If the test shows sealing won’t help much, we’ll say so.

Price

Aeroseal duct sealing: $1,499 + HST (fall/winter price)
Aeroseal plus air balancing: $1,799 + HST (fall/winter price)

All registers in the home included.

Also included: the leakage test before and after, hand-sealing of accessible gaps, Aeroseal sealing and your Seal Certificate. Repairs to disconnected ducts or large gaps are quoted before we do them. See all services and prices →

Mississauga questions

Is Aeroseal the same as duct cleaning?

No. Cleaning removes dust. Aeroseal seals leaks so more heated or cooled air reaches your rooms.

Does Aeroseal work in townhouses and condos?

In townhouses with their own forced-air system, yes. In condos it depends on whether your unit has its own ducts. Send us a photo and we’ll tell you.

How do I know it worked?

We measure your leakage before and after sealing. Both numbers are on your Aeroseal Seal Certificate, and you keep a copy.

How long does it take, and do I need to be home?

Most homes take about 4 hours for sealing, or about 6 with air balancing. Someone needs to let us in and be around at the start and the end. We ask that as few people as possible stay in the house while the sealing runs.

How soon can you come?

We work Monday to Saturday, 8 am to 6 pm. Being based in Mississauga makes local bookings easier. Call 647-218-8031 for the next opening.

Find out how much your ducts leak

Call or text 647-218-8031, Monday to Saturday, 8 am to 6 pm. Or send us your postal code and what’s going on, and we’ll call you back with a price.