
Local service
Thermos replacement in Westmount
Your glazier in Westmount for thermos glass replacement: we replace only the sealed unit in your existing frame — custom glass, free diagnosis, transparent pricing.
Local expert
Your thermos specialist in Westmount
Fog between the panes means the seal on your sealed unit has failed. In Westmount, the large windows of Victorian greystone homes, often old, fog up over time.
Good news: replacing the whole window is rarely necessary. We replace only the faulty sealed unit within the existing frame, with custom glass that preserves the heritage character.
Custom glass for non-standard dimensions, free diagnosis, transparent pricing from $150.

Local context
Westmount: new glass without changing the facade
Westmount is known for its stone and brick houses, the row houses of lower Westmount and the large homes set into the mountainside in upper Westmount. Windows tend to be tall, sash or casement, sometimes divided by muntins. Many owners are keen to keep their original wood frames and trim. Those frames are often still in good shape, even when the sealed units inside have long since fogged over, which makes glass-only replacement a natural fit.
The City keeps a close eye on the exterior look of buildings. Replacing just the sealed unit in the existing frame clears up the fog without changing the window's proportions; if you're unsure about a particular facade, check with the City before the work. For rooms shaded by mature trees, Low-E argon glazing cuts down the chill near the glass.
In upper Westmount, steep streets, front steps and terraced lots take some planning, so tell us the most direct route to the windows. In lower Westmount, near Victoria or Greene Avenue, street parking is regulated. If you have windows with muntins, point them out during the assessment so we can work out the best approach. A little planning keeps the visit short.
Areas served
- Upper Westmount
- Lower Westmount
- Victoria Village
- Greene Avenue area
- Westmount Park area
- Summit Woods
Why it happens here
Westmount: why your windows fog up
Facade preserved
Only the glass changes; the window's proportions and trim stay as they are.
Windows with muntins
Assessed on site so we can pick the right solution.
Sloped lots
Steps and terraces in upper Westmount: we plan access with you.
Shade from big trees
Low-E argon glass reduces cold glass in shaded rooms.
Our services
Our services in Westmount
Thermos replacement
We replace the failed sealed unit inside your existing frame — no need to change the whole window.
Learn moreFoggy glass / condensation between panes
Diagnosis of permanent fogging between panes and sealed unit replacement.
Learn moreGlass & window repair
Broken or cracked glass? Fast on-site glass replacement, all sizes.
Learn moreDouble & triple glazing
Upgrade your insulation with a double or triple argon-filled sealed unit.
Learn morePatio door & French door
Sealed unit replacement for your sliding and French doors.
Learn moreCustom glass & mirrors
Custom-cut glass and mirrors for all your applications.
Learn moreCommercial glazing
Glazing solutions for shops, offices and buildings across Greater Montreal.
Learn moreNeighbouring areas
We also serve nearby areas
Simple and fast
How it works in Westmount
Call or photo
Send a photo of your foggy window or call us — we'll guide you.
Diagnosis & measurement
We measure your sealed unit and confirm the diagnosis, free of charge.
Custom fabrication
Your sealed unit is custom-made and ready within 24 to 72 hours.
Guaranteed installation
Clean installation with a written warranty included.
FAQ
Questions about Westmount
Do you serve Westmount?
Yes, we work throughout Westmount, from Greene Avenue to the slopes of Mount Royal. Diagnosis and travel are free.
What are the timelines in Westmount?
Diagnosis is done quickly on site, then your sealed unit is custom-made within 24 to 72 hours.
Do you replace the windows of Victorian homes?
Yes, we custom-cut glass to the exact dimensions of your windows and install it in the existing frame, preserving the heritage character.
Do I need a permit in Westmount to replace a thermos?
Replacing the sealed unit in the existing frame doesn't change how the window looks. Since the City closely regulates exterior work, check with them if your home has specific requirements. We can provide the technical details if needed.
Can you keep my original wood frames?
Yes, that's the whole idea behind our service. If the wood is sound, we remove the foggy unit and install a new custom thermos in the same frame. The free assessment lets us check the wood before quoting.

Ready for clear windows again?
Free quote, honest diagnosis and transparent pricing. Call us or request your quote now.
Request your free quote
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