Types of Casement Windows: A Complete Guide
Thinking about upgrading your windows but not sure which type of casement window fits your home or project?
Casement windows are not all the same. At ZMR, we offer six major styles—each with unique functions, aesthetics and performance. Below you’ll find real examples from the USA, Canada and Australia, standard sizes (mm & inches), and our premium configurations to help you choose.
1. Single Casement Windows (Inward & Outward Opening)
Single-panel windows that open either inward or outward.
Inward-opening: easy cleaning from inside, ideal for high-rise apartments.
Outward-opening: save indoor space, maximize airflow, perfect for villas and houses.
Standard sizes: width 400–900 mm (15.7–35.4 in) × height 600–1800 mm (23.6–70.9 in).
Case (USA): A Chicago condo replaced old sliding windows with inward-opening casement + Low-E double glass, cutting noise and improving insulation.
2. Double Casement Windows
Two side-by-side panels opening in opposite directions—ideal for larger openings and symmetrical designs.
Standard sizes: width 800–1600 mm (31.5–63.0 in) × height 1000–2000 mm (39.4–78.7 in).
Case (Canada): A Toronto townhouse upgraded to double casements with argon-filled triple glass, boosting energy efficiency and resale appeal.
3. French Casement Windows (Without a Central Post)
Two sashes open outward without a vertical mullion, creating an unobstructed view—often called mullion-free or “no post” casement.
Perfect for living rooms, balconies or anywhere you want a panoramic view.
Standard sizes: width 800–1800 mm (31.5–70.9 in) × height 1000–2200 mm (39.4–86.6 in).
Case (Australia): A Brisbane villa installed French casement windows, reporting quieter interiors and higher property value.
4. Top-Hinged Casement Windows (Awning Style)
Hinged at the top and open outward from the bottom, letting fresh air in even during rain.
Ideal for kitchens, bathrooms or above fixed windows.
Standard sizes: width 400–1200 mm (15.7–47.2 in) × height 400–800 mm (15.7–31.5 in).
5. Bottom-Hinged Casement Windows (Hopper Style)
Hinged at the bottom, opening inward at the top—commonly used in basements or areas where outward opening isn’t practical.
Standard sizes: width 400–900 mm (15.7–35.4 in) × height 400–800 mm (15.7–31.5 in).
6. Fixed Casement Windows
Non-operable panels that match casement aesthetics but do not open—great for maximizing daylight or combining with operable units.
Standard sizes: highly customizable; often paired with operable casements to create large glass walls.
ZMR Professional Configurations
Thermal-break aluminum profiles for superior insulation.
Profile colors & finishes: powder-coated, anodized, or wood-grain effect.
Double or triple glazing with argon gas for energy savings.
Low-E tempered glass to block UV and reduce heat gain.
Multi-point locking hardware for security and smooth operation.
Customer Cases
We supplied French casement windows (no central post) and single outward-opening casements for a luxury resort project in Queensland, Australia. The combination improved energy performance, reduced noise, and upgraded the property’s aesthetics—helping the owner increase nightly room rates.
FAQs about the Types of Casment Windows
It depends on your space and needs. Inward-opening works well for apartments; outward or French casements suit villas; awning or hopper styles fit kitchens and basements.
We offer widths from 400–1800 mm (15.7–70.9 in) and heights from 400–2200 mm (15.7–86.6 in) depending on style. All can be customized for your project.
Yes. We use thermal-break aluminum profiles with double or triple Low-E glazing and argon gas, significantly reducing heat transfer and lowering energy bills.
Double casements have a mullion between the sashes, while French casements open without a central post, giving you an unobstructed view and a wider opening.
Absolutely. ZMR offers powder-coated, anodized, and wood-grain finishes in multiple colors to match any architectural style.
Simply visit our website and fill out the quick request form. Our team will provide a tailored recommendation and pricing based on your specifications.
Conclusion
Choosing the right type of casement window—from single inward/outward to French mullion-free—directly impacts your home’s comfort, energy bills, and resale value.
ZMR offers fully customizable sizes, finishes, and glazing options tailored for the USA, Canada, and Australia markets.
Visit our casement window now to request a free consultation and quote—our team will help you select the perfect casement windows for your project.
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