Can Aluminum Windows Be Ordered in Custom Sizes?

Why standard sizes do not always fit

Many older apartments, renovated walls and irregular architectural designs have openings that do not follow standard window dimensions. A window that is even a few centimeters off can leave gaps, weaken the seal or force awkward compromises in the wall finish.

Custom sizing solves this by building the frame around the opening you actually have. The result is a cleaner look, better insulation and a window that sits properly in its space.

How custom sizing works at our factory

The process starts with an inquiry where you send photos and basic information about the opening. We then measure on site, checking width and height at several points, since walls are rarely perfectly square.

Based on these measurements we prepare a drawing and a written specification. You review and approve it before anything goes into production, so you know exactly what will be delivered.

What affects the final dimensions

Several factors shape the final size of a custom aluminum window:

• The clear opening measured at the wall, not the finished plaster
• Whether the window opens inward or outward and in which direction
• The profile system and glazing thickness you choose
• Any fixed panels, transoms or sliding sections

Our team discusses these points with you during the survey so nothing is overlooked.

Preparing the opening for installation

Before installation, the opening should be clean, level and free of loose material. Let us know if the wall is still unfinished, because the timing of measurement relative to plastering can affect the result.

Installation is carried out after production and finishing. We recommend coordinating the installation date with other trades so the window is not exposed to construction dust or damage.

Finishing options for made-to-measure windows

Custom aluminum windows can be finished in a range of colors to match the rest of the building or your interior style. The chosen finish is recorded in the specification so that the color you approve is the color you receive.

Because each window is made individually, you can also combine finishes or glazing types across different openings in the same project.

Who benefits most from custom sizing

Custom aluminum windows are especially useful for homeowners with non-standard openings, building committees renovating several units, contractors facing irregular walls and architects or interior designers who want precise proportions. If your opening is unusual, a custom window is usually the most practical route.

Send us your measurements or photos and we will advise whether custom sizing is the right approach for your project.

Frequently asked questions

Do I need exact measurements before contacting you?

Not necessarily. Rough dimensions and clear photos are enough to start the inquiry, and we confirm everything with an on-site measurement.

How do you measure an opening that is not square?

We check width and height at several points on site and base the drawing on the actual dimensions, not on a single reading.

Can a custom window include a fixed panel or sliding section?

Yes, custom designs can combine fixed panels, opening sections and sliding parts, as long as the layout is agreed in the approved specification.

Is the window approved before production starts?

Yes, you receive a drawing and written specification and approve them before we begin manufacturing.

Common mistakes to avoid

A common mistake is measuring the opening after plaster or tiles are applied, which can change the fit. Another is ordering from rough estimates without an on-site check.

Our recommendation

Measure the clear opening at several points and share photos early, then let us confirm the dimensions on site before approving the drawing.

Summary

Aluminum windows can absolutely be ordered in custom sizes, made to measure after an on-site survey and approved drawing.

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• How Long Does a Custom Aluminum Window Order Take?
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• Should I Hire an Installer or Fit Aluminum Windows Myself?
• Do Aluminum Windows Need Less Maintenance Than Steel?
• What Warranty Should I Expect on Aluminum Windows?
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