Corner windows in Toronto, Ontario, Canada dissolve the boundary between indoors and outdoors at the most dramatic point of any home — the corner. At Opulence Architectural Systems, we engineer and install frameless and minimal-frame corner window systems from Schüco, Reynaers, and Secco.

Frameless Butt-Glazed Corners

Our signature frameless corner windows join two glass panels at 90 degrees using only structural silicone sealant — no visible frame, mullion, or corner post. The result is pure glass meeting glass, with an uninterrupted view that sweeps around the corner of your home. Concealed steel brackets at the head and sill carry all structural loads while remaining invisible from inside and outside.

Structural Glass Fins & Minimal Mullions

For larger corner spans or higher wind-load zones, we offer two alternatives to full butt-glazing: structural glass fins (transparent vertical glass blades at the corner that provide structural support while remaining nearly invisible) and minimal mullion corners using Schüco or Reynaers profiles as narrow as 25mm. Both options preserve the dramatic panoramic effect while meeting engineering requirements for Toronto's building codes.

Opening & Sliding Corner Systems

Our Schüco ASS 77 PD and Reynaers CP 155-LS sliding systems allow one or both glass panels to slide away from the corner entirely, creating an open-air corner that connects interior living spaces directly to terraces and gardens. When closed, the panels align flush with the corner glass for a seamless appearance. This is the ultimate expression of indoor-outdoor Toronto living.

Engineering & Installation

Every corner window project begins with a structural engineering assessment. Our team evaluates the existing building corner — concrete, steel, or wood frame — and designs the appropriate support system. We coordinate with your architect and general contractor to ensure the structural opening is prepared correctly, the waterproofing is detailed properly, and the glass is installed with the precision these systems demand.

Engineer Your Corner View

See frameless corner window samples at our showroom. Book a design consultation or call +1 (647) 409-8922.

Frequently Asked Questions

What is a corner window?

A corner window wraps around the corner of a building, replacing the solid wall corner post with glass. This creates an uninterrupted panoramic view and floods the interior with natural light from two directions. Corner windows can be fully frameless (butt-glazed with structural silicone), have a minimal mullion, or use a structural glass fin — each option offers a different balance of transparency, cost, and structural capacity.

Can corner windows be frameless?

Yes. Our butt-glazed corner window systems join two glass panels at a 90-degree angle using only structural silicone sealant — no metal frame or corner post is visible. The glass panels are supported by concealed structural brackets at the top and bottom. For larger panels, we use a transparent structural glass fin (a vertical glass blade at the corner) that provides support while remaining nearly invisible.

Are corner windows structurally safe?

Absolutely. Corner windows are engineered to meet or exceed Ontario Building Code requirements for wind load, impact resistance, and seismic loading. We use tempered or laminated safety glass, structural silicone with proven 50+ year performance, and concealed steel or aluminum brackets engineered for the specific loads at your corner. Every installation includes a structural engineering review.

Can corner windows open for ventilation?

Yes. We design corner configurations where one or both panels adjacent to the corner are operable — either as casement, tilt-and-turn, or sliding sashes. The fixed corner panel provides the seamless glass-to-glass view, while the operating panels beside it deliver ventilation. Schüco's ASS 77 PD sliding system can even create opening corners where both panels slide away entirely.

What does a corner window cost in Toronto?

Corner windows are a premium architectural feature. Depending on size, glass type, and whether the corner is frameless (butt-glazed) or uses a minimal mullion, costs range from $5,000 to $25,000 per corner installation. Frameless structural corners are at the higher end due to the engineering, specialized glass, and structural silicone work required. We provide detailed pricing during our free consultation.

Corner Windows in Toronto, Ontario, Canada