Window Types for Ontario Homes: A Complete Guide

Choosing the right window type for each opening improves function, energy performance, and appearance.

Window and Door Replacement

Ontario's climate requires windows that perform well across a wide range of conditions. The right window type for each opening depends on ventilation needs, architectural context, and thermal performance requirements.

Casement windows hinge at the side and crank outward. They provide excellent ventilation, seal tightly when closed, and are easy to operate from the interior. They're the preferred type for most new construction in Canada.

Energy Efficiency and Style

Double-hung windows slide vertically. Both sashes move, allowing ventilation from top and bottom simultaneously. They're traditional in appearance and suit colonial and older architectural styles well.

Slider windows open horizontally. They're practical for wider openings where a casement would be inconvenient and are common in basement applications where outward swing isn't possible.

Getting a Free Estimate

Fixed windows provide light without ventilation. They're used in combination with operable units in picture window configurations or in locations where ventilation isn't needed but light and view matter.

Awning windows hinge at the top and open outward at the bottom. They can remain open in light rain without water entry and are common in basements and bathrooms.

Bay and bow windows project outward from the wall, creating interior space and exterior architectural interest. They're complex installations that require careful structural support, flashing, and trim integration. Performance varies significantly by installation quality.

Devon Moore, Operations Lead Co-Founder & Operations Lead — D&D Exterior Finishing

Devon Moore is the co-founder and Operations Lead at D&D Exterior Finishing, specializing in siding, roofing, windows, and exterior renovations across Waterloo Region.