Custom Aluminum Window Shapes: Arched, Triangular and Circular

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Custom shape aluminum windows, including arched, triangular and circular designs, are made to measure from a drawing and on-site measurements, then fabricated in the factory to fit your facade. Early coordination between the architect, the window maker and the structural engineer is what keeps unusual openings accurate and easy to install.

Why Unique Window Shapes Need Early Planning

A non-rectangular window changes almost every part of the job, from the profile geometry to the way the frame is anchored into the structure. Arched, triangular and circular openings rarely match standard sizes, so each unit is designed around its own opening. The sooner the window maker sees the architectural drawings, the fewer surprises appear on site.

Planning early also helps align the window with the facade grid, sill heights and wall thickness. A shape that looks simple on paper may need reinforcement or a special sill detail once the wall build-up is known.

Common Shapes and Where They Work Best

Each shape suits different architectural goals. Designers usually choose from a few recurring forms:

Arched: a semicircular or segmental top that softens the facade and suits classical or Mediterranean styles.
Triangular: a sharp geometric accent, often used in gables, roof planes and modern elevations.
Circular: a round or oculus window that adds a focal point to stairwells, entrances and bathrooms.

Combining a fixed shape with an operable sash is common, so ventilation and cleaning access are still possible.

From Drawing to Measurement

The process starts with your drawing, which should show the opening dimensions, the curve radius or angle, and the wall build-up. We then visit the site to measure the actual opening, because walls are rarely perfectly square or level. Curved and angled openings are sensitive to small errors, so measuring the real opening is essential before production begins.

After measurement we prepare a drawing and a written specification covering profile sections, glass type, opening direction and fixing points. You review and approve it before any material is cut.

Fabrication of Curved and Angled Aluminum Profiles

Curved and angled aluminum sections are shaped and joined in our Tel Aviv factory according to the approved drawing. Each corner and curve is checked during assembly so the frame sits true and the glazing fits cleanly. Sealing and glazing details are planned in advance, because curved glass and angled panes need precise bedding to remain weathertight.

Finishing, such as powder coating in the color you choose, is applied before delivery so the window arrives ready to install.

Installation and Structural Coordination

Non-standard openings place different loads on the wall and lintel, so the window fixing and any supporting steel should be coordinated with the structural engineer. We recommend confirming the anchoring method, the lintel detail and the sill slope before the window is manufactured.

Confirm the opening after the masonry or structure is complete.
Agree on the anchoring points and the sealing sequence.
Plan access for cleaning and any future maintenance.

Choosing the Right Partner for Custom Shapes

Working with a factory that manufactures to measure makes a real difference on complex openings. Look for a team that asks for drawings, measures on site, provides a written specification and shows you the finish before production. Our family-run workshop has been making metalwork since 1945, and we work directly with architects, interior designers and contractors on unusual facade elements.

Frequently asked questions

Can aluminum windows be made in a perfect circle?

Yes, circular and oculus windows can be made to measure, with the frame curved to the required radius. A fixed round unit is the most common choice, while operable options depend on the design and hardware.

Do I need to send a drawing before the site visit?

A drawing or sketch with the intended opening shape and approximate dimensions helps a lot. We still measure on site, because the real opening is what the window must match.

Are arched windows more expensive than standard windows?

Custom shapes generally require more design, measuring and fabrication work than standard sizes, so they cost more to produce. Please contact us for a quote based on your specific drawing.

Can the window color match the rest of the facade?

Yes, aluminum windows can be powder coated in a range of colors, so the frames can match other metalwork on the building. We can show finish options before production starts.

Common mistakes to avoid

A common mistake is ordering a curved or angled window from rough dimensions without a site measurement, which often leads to a frame that does not fit the real opening. Another is leaving the lintel and sill details until after the window is made.

Our recommendation

Send the architectural drawing early, schedule the site measurement before the masonry is finished, and approve a written specification with profile, glass and fixing details before production begins.

Summary

Custom arched, triangular and circular aluminum windows are achievable with careful drawing, accurate on-site measurement and early structural coordination.

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