# Window wall vs. curtain wall

**Published by:** [Brandon Donnelly](https://brandondonnelly.com/)
**Published on:** 2013-11-27
**URL:** https://brandondonnelly.com/window-wall-vs-curtain-wall

## Content

Most condo buildings in Toronto use what’s called window wall. This is in contrast to what looks to be window wall on the western most buildings. Historically, curtain wall has been more expensive than window wall. It also typically performs better. But most condo buildings in Toronto use window wall. The difference between the two is that window wall sits between the concrete (slab) floors, where as curtain wall attaches to the outside. The performance difference comes from the fact that you usually want to minimize breaks in a building’s envelope.

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