Window track cleaning in Markham: what the crew found
Quick answer: In October 2026 Vitalii, of the DT Cleaning crew, cleaned the window tracks of a house in Markham. The tracks were not just dusty: black mould had grown along the frames, around a casement hinge and in the corners, and a sliding track held dry leaves and grime. The client paid $20 per window for the track work.
The crew's verdict: wiping this kind of mould with a cloth would not work. Tracks are part of our interior window cleaning service.
Why the casement sash had to come off
Quick answer: On a casement window the hinge arm and its plates sit right in the frame track, in the mould. On this Markham job in October 2026 the crew took the casement window apart, took the sash off and cleaned it from every side, so that no spot was left anywhere for the mould to stay in.
"We had to take the window apart completely, take it off and clean it from every side, so there is no place left for mould at all."
Vitalii, DT Cleaning crew, Markham (translated from his voice note)
Mould product first: why a cloth will not do it
Quick answer: Simply wiping mould with a cloth will not work, so DT Cleaning uses a product made for cleaning mould out of window tracks. On this October 2026 Markham job the crew sprayed it over everything first, into every hard-to-reach gap, then cleaned it all out with special brushes and wiped it down with cloths.
Steam and a brush nozzle for the corners nobody reaches
Quick answer: Once the heavy debris and the mould were out, the crew went over the tracks with a steam cleaner fitted with a brush nozzle. In the crew's words, tracks have a great many hard-to-reach places, and steam gets the dirt out of the glass corners and gaps that window washing almost never touches. Markham, October 2026.
Steam also finished an August 2026 Toronto job with mould in the window tracks.
Dirt that sat in water: why steam and the product work together
Quick answer: The worst dirt in a track has dried hard after standing in water. On this Markham job in October 2026, steam plus the mould product softened it, and then it came off easily with a brush. That is why the crew used both: the product for the mould, the steam for the dried crust.
Careful with the chemicals: fabric burns and fumes
Quick answer: Mould products need care. Vitalii, on this October 2026 job: "You have to be as careful as possible with the chemicals, because if they get on dark materials, they can leave burns on the fabric." The technician has to be careful too: the fumes can be breathed in, and headaches can start.
CCOHS, Canada's workplace health and safety centre, notes in its guidance on moulds: "The use of chemical disinfectants can pose health concerns for people in occupied spaces of the building."
How much does it cost to clean window tracks in Markham?
Quick answer: On this October 2026 Markham job, DT Cleaning's track cleaning cost $20 per window, on top of the window cleaning. The crew says people pay much more for this kind of cleaning, because it counts as heavy track cleaning and needs chemicals. The invoice total is not part of this record.
| Job record | Detail |
|---|---|
| Place | Markham, October 2026 |
| Windows | Casement and sliding |
| Found | Black mould in the tracks, leaves and grime |
| Method | Mould product, casement sash off, brushes, cloths, steam |
| Track cleaning | $20 per window |
| Window cleaning | Billed separately |
For comparison, the August 2026 Toronto track job billed $30 for the track work beside $130 for the windows. Window cleaning prices: our window cleaning prices in Toronto guide.
Why window tracks grow mould, and how to slow it
Quick answer: Water collects in a track. In this Markham house, dirt had dried hard there after standing in water, and mould had grown along the frames. The Government of Canada's first tip for windows is short: "Dry your window frames and sills daily to keep water from dripping and causing mould to grow." October 2026.
That line is from the guide Addressing moisture and mould in your home. CCOHS adds: "Insulate cold surfaces to prevent condensation on piping, windows, exterior walls, roofs and floors where possible." More on the glass side: removing black mould from window sills.
Window track cleaning in Markham and across the GTA
Quick answer: DT Cleaning cleans windows, tracks and frames in Markham and across the GTA with 2 crews from 7 Inverleigh Dr, Etobicoke, and carries $2M CGL insurance and WSIB. Our crews are Working at Heights certified; Ontario's working at heights page requires that training for construction workers who use fall protection.
The windows on this house came out fully clean, and the client was satisfied. See our window cleaning in Toronto page.
Window track cleaning in Markham: common questions
What did window track cleaning cost on this job?
$20 per window for the tracks, on top of the window cleaning.
Why take a casement sash off?
Its hinge sits in the track. Off, it is cleaned on every side.
Can a cloth wipe mould out of a track?
Not this mould. It took a mould product first.
What does the steam cleaner do?
It softens dried dirt and reaches the corners.
Why is track dirt so hard to remove?
It dries hard after standing in water.
Can mould products damage fabric?
Yes. On dark materials they can leave burns.
Are the fumes a risk?
For the technician, yes: headaches can start.
Why does heavy track cleaning cost more?
It counts as heavy track cleaning and needs chemicals.
Do you clean sliding window tracks too?
Yes. This house had sliding tracks full of leaves.
How do I slow mould in my tracks?
Dry the frames and sills daily, as the Government of Canada advises.
Was the client happy with the result?
Yes. The windows came out fully clean.
Do you clean window tracks in Markham?
Yes. Call (647) 558-8411.
How this case study was made: from the crew's voice note and photos of this October 2026 job; drafted with AI; the facts checked against the recording and the owner's answers before publishing.
Related window cleaning case studies
Mould in your window tracks?
Our crew took a casement sash off and steam-cleaned every track in this Markham house. Call for a quote.