
Local service
Thermos replacement in Longueuil
Your glazier in Longueuil 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 Longueuil
Fog between the panes means the seal on your sealed unit has failed. In Longueuil, internal condensation affects both bungalow windows and those of condos and apartment buildings.
Good news: replacing the whole window is rarely necessary. We replace only the faulty sealed unit within the existing frame, with custom glass.
Custom glass for non-standard dimensions, free diagnosis, transparent pricing from $150.

Local context
Longueuil, from Old Longueuil to Saint-Hubert: your sealed units
Longueuil covers very different kinds of neighbourhoods. Around rue Saint-Charles, Old Longueuil still has older houses whose windows have often been changed over decades of renovations. Saint-Hubert and Greenfield Park are mostly bungalows, cottages and split-levels with the sliding and casement windows typical of postwar suburbs. Closer to the river and the metro station, condo towers are lined with fixed windows and balcony patio doors.
Along Route 132, facades facing the St. Lawrence take the brunt of the wind and temperature swings, which wears on the seals. Once fog shows up between the panes, the fix is a new sealed unit; defogging by injection doesn't repair a failed seal. Condo patio doors get tempered glass. On a busy street or near Saint-Hubert airport, triple glazing with argon can cut some of the noise and reduce heat loss.
In a condo building, check with your board who is responsible for the windows before asking for a quote, since it depends on the declaration of co-ownership. In a house, clear inside access to the affected windows and note which ones fog up in the morning. During the free assessment, we measure each unit for custom fabrication. Appointments are available Monday to Saturday, which often saves you taking a day off work.
Areas served
- Old Longueuil
- Saint-Hubert
- Greenfield Park
- LeMoyne
- Laflèche
Why it happens here
Longueuil: why your windows fog up
Three boroughs
Old Longueuil, Saint-Hubert and Greenfield Park: very different homes and windows.
Wind off the river
Facades facing the St. Lawrence put extra strain on sealed units.
Condos near the metro
Balcony patio doors and fixed windows: custom tempered-glass sealed units.
Suburban bungalows
Original sliders and casements: we replace the thermos, the frame stays put.
Our services
Our services in Longueuil
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 Longueuil
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 Longueuil
Do you serve Longueuil?
Yes, we work throughout Longueuil, from Old Longueuil to Greenfield Park. Diagnosis and travel are free.
What are the timelines in Longueuil?
Diagnosis is done quickly on site, then your sealed unit is custom-made within 24 to 72 hours.
Do you replace the sealed unit of condos?
Yes, we replace the sealed unit of condo windows, coordinating with your association when needed.
My riverside condo has a foggy patio door. What do you do?
We replace the patio door's sealed unit with a custom tempered-glass unit, installed in the existing frame. Before getting a quote, confirm with your condo board who is responsible for the windows and doors of your unit.
Is triple glazing worth it in Saint-Hubert?
It can make sense for bedrooms facing a busy street or near the airport, since it reduces some of the noise and improves insulation. The frame has to accept the thicker unit, though, and we check that during the free assessment.

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