Thermos or Complete Window Replacement: Why do it before winter in Montreal?
Are your windows ready for the Quebec winter?
Every fall in Montreal and Laval, thousands of homeowners notice the same signs: condensation between windows, a feeling of cold near the windows, or Hydro-Québec bills that climb for no reason.
The question then comes up frequently:
Should we replace the entire window frameor simply the thermos (the sealed glass unit) ?
This comprehensive guide helps you make the right choice — Save up to 70% %improve your insulation before winter and extend the life of your existing windows.
What is the difference between a thermos and a full window?
🔸 The thermos
This is the heart of your window A sealed glass unit consisting of two (or three) panes of glass separated by a spacer, often filled with argon gas. This spacer is what ensures thermal and acoustic insulation.
When you see condensation inside the windowsIt's not the entire window that's defective, but simply the thermos seal which is broken.
🔸 The complete window
She understands the frame (or chassis), THE thermos, THE opening mechanisms and the finishing touches. Replacing it is a more involved renovation: dismantling the frame, insulating the surrounding area, painting, etc.
Thermos Replacement: The Smart Solution (in 90% of cases)
In most situations, your window frame (made of PVC, aluminum, or wood) is still in very good conditionThe problem simply comes from the thermos.
✅ You can opt for a change of thermos if:
- You see some fogcondensation or stains on the inside of the windows.
- THE The frame is solid (not rotten, nor cracked).
- THE opening mechanisms they still work well.
- You feel the cold through the glass, but not around the frame.
- One pane of glass is cracked, but the structure is intact.
The tangible benefits of replacing a thermos
💸 1. Substantial savings
Replacing a thermos costs 50 % to 70 % cheaper than replacing an entire window. You only pay for the glass — no demolition or frame reconstruction.
⚡ 2. Improved energy efficiency
A new thermos insulates better. You reduce:
- THE heat loss winter
- THE heating costs
- There condensation on the windows
👉 On average, a high-performance thermos can reduce energy losses by up to 30 %.
⏱️ 3. Quick and clean installation
Replacing a thermos often takes less than an hour per windowNo dust, no repainting, and no disruption to your home.
🌱 4. An eco-friendly and sustainable choice
Why throw away a frame that's still sound? Replacing only the glass is:
- Reduce the waste
- Avoid burying PVC and aluminum
- Give a second life at your windows
When should the entire window be replaced?
Sometimes, replacing the thermos isn't enough. Here are the cases where a complete replacement is necessary:
- Rotten or deformed frame (especially made of wood)
- Cracks or subsidence of the chassis
- Major air leak around the frame
- Structural problem The frame is no longer secure or is moving.
- Style change (e.g., guillotine → swinging)
Why do the replacement before winter?
Change your thermos in the fall is the best time to:
- Enjoy the recent mild temperatures for quick installation
- Avoid the winter delayswhen demand explodes
- Improve Insulation before the cold weather arrives
- Reduce your Hydro bills starting in November
It's a small gesture that pays off big: More comfort, more light, and more savings all winter long.
Why choose ChangementdeThermos.com?
Our technicians respond quickly to Montreal, Laval and the North ShoreWe use products adapted to the Quebec climate, guaranteeing durability and efficiency.
- Free submission and transparent
- Quick and clean replacement
- High-performance thermoses locally made
Conclusion: The clear solution for your windows
Before investing thousands of dollars in new windows, ask yourself this question:
"Is my frame still in good condition?"
If the answer is yes, Replacing the thermos is the best option — more economical, more ecological, and just as effective as a new window.
📞 Call today for a free quote!
Don't let fog ruin your view or your comfort this winter.
Contact ChangeofThermos.com for a Quick, affordable, and hassle-free replacement.
