Aeroseal Duct Sealing in Toronto
Some rooms never warm up in winter. The upstairs bakes in July. The furnace runs and runs, and you’re still living with uneven room temperatures. In a lot of Toronto homes, part of the reason is leaky ductwork, hidden inside walls, floors and finished basement ceilings where you’d never see it.
We measure how much your ducts leak, fix the gaps we can reach by hand, seal the rest from the inside with Aeroseal, then measure again. You keep the Aeroseal Seal Certificate with both numbers on it.
A recent Toronto job
We recently sealed the ducts in a home in Toronto. Before sealing, the duct leakage measured 37.7%. After sealing, it measured 3.3%.
Before sealing anything, we ran a smoke test. Theatrical smoke goes into the duct system and shows where the air is getting out. Here it showed us three vents that had come disconnected, so the air meant for those rooms was going into the ceiling and walls instead.
A disconnected duct is far too big a gap for Aeroseal, which seals openings up to about 5/8 inch. So we fixed all three vents by hand first, and then ran the Aeroseal sealing on the rest of the system.
The leakage left at the end was 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 never share our customers’ addresses.
Where we work in Toronto
All of Toronto, including Etobicoke, North York, Scarborough, East York, York and the older neighbourhoods closer to downtown, such as Leslieville, the Danforth, the Annex, High Park, Leaside and the Beaches. We’re based in Mississauga, so the west end is close and the rest of the city is a regular drive for us.
Toronto homes and their ducts
Toronto has a big mix of houses, and the duct problems tend to vary with them. Generally speaking, here’s what we look for:
- Older semis and detached homes where the ductwork was added to or rerouted during renovations. Every joint added over the years is a possible leak, and connections can work loose.
- Post-war bungalows and 1960s to 80s houses that still have their original ducts.
- Finished basements where the trunk lines and branch runs are closed in behind drywall or a drop ceiling.
- Newer infill homes where ducts run through tight floor cavities and are hard to reach by hand.
How it works
- Test first. We measure your duct leakage before we start. When something big seems to be wrong, a smoke test helps us find it.
- Fix what’s reachable. Disconnected vents, large gaps and loose connections get 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, like the three vents in our recent Toronto job, 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 →
Toronto questions
Is Aeroseal the same as duct cleaning?
No. Duct cleaning removes dust and debris. Aeroseal seals leaks so more of the air your furnace or AC moves actually reaches your rooms.
What happens if one of my vents has come disconnected?
We reconnect it by hand before sealing. Aeroseal closes gaps up to about 5/8 inch, and a duct that’s come apart is far bigger than that. On a recent job in Toronto, a smoke test showed us three disconnected vents. We fixed them by hand first, then sealed the rest with Aeroseal, and the leakage went from 37.7% to 3.3%. If we have to open a wall or ceiling to reach a duct, patching it afterwards is up to the homeowner. We’ll always tell you what we found before doing extra work.
My ducts are behind plaster or drywall. Can you still seal them?
Usually, yes. That’s what Aeroseal is for. The sealant travels through the ducts from the inside, so walls and ceilings stay closed. The exception is a duct that’s fully disconnected, which has to be reconnected first.
Will it fix my hot upstairs?
If leaky ducts are part of the cause, sealing helps more air reach those rooms. Sometimes air balancing is needed too, which is why we offer the two together. We test first, so you’ll know what’s going on before you pay for sealing.
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. It can take longer if we find disconnected ducts that need fixing first. 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.
Do you cover my part of Toronto?
Yes. Toronto is one of our regular service areas, from Etobicoke to Scarborough and North York down to the lake. We work Monday to Saturday, 8 am to 6 pm. Call 647-218-8031 for the next opening.
Want to know 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.
Also serving: Mississauga · Newmarket · Burlington · Brampton · All service areas