Traffic, plows, neighbors, planes — living in Montreal means constant urban noise. Here is what really cuts decibels at the window.
Understanding STC Ratings
Sound Transmission Class (STC) measures how much noise a window blocks. Standard double-pane windows rate STC 26–28. Quality acoustic windows can reach STC 38–45 — a perceived noise reduction of 60–75%.
What Actually Works
- Laminated glass — a vinyl interlayer dampens vibration
- Mismatched pane thickness (e.g. 4mm + 6mm) breaks resonance
- Wider air gaps (16–20mm) outperform tight gaps
- Tight perimeter seals — gaps undo every other improvement
Best Picks for Montreal Apartments
Casement and awning windows with laminated outer glass deliver the best real-world performance in noisy boroughs like Plateau, Mile End, and around De Maisonneuve.
Frequently Asked Questions
Do triple-pane windows reduce noise?
Modestly — the extra pane helps but mismatched thickness and laminated glass help more.
What about secondary glazing inserts?
Effective but reduce daylight; full replacement is often a better long-term investment.
How much do acoustic windows cost?
Expect 25–40% more than standard double-pane in the same style.