what size is my velux window

Determine Your Velux Window Size

By Matthew Allen
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Determining the size of your Velux window is crucial for choosing the right blinds, shades, or other accessories. It also helps in ensuring proper installation and maintenance. But how do you measure a Velux window? Let's dive into the details.

Velux windows are typically measured in millimeters (mm) and come in various sizes to fit different roof pitches and room sizes. The size is determined by the width and height of the window, excluding the frame.

Measuring Velux Window Width

To measure the width of your Velux window, you'll need to determine the internal width. This is the distance between the two side jambs (or sides) of the window, excluding the frame.

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Velux Window Trends 2026 (UK Guide)
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Velux Window Size Chart

Use a measuring tape to measure from the inside edge of one jamb to the inside edge of the other. Ensure the measurement is taken at the widest point, as Velux windows can have a slight taper at the top and bottom.

Width Measurement Tips

If your window is obstructed by furniture or other objects, you may need to remove them temporarily to get an accurate measurement. Also, ensure the measurement is taken at the same level as the window's glazing bar to avoid any inaccuracies.

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For Velux windows with a center pivot, measure the width at the glazing bar level. For top-hung windows, measure at the top of the window, where the sash meets the frame.

Measuring Velux Window Height

Measuring the height of your Velux window is just as important as measuring the width. The height is measured from the top of the window to the bottom, excluding the frame.

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Use a measuring tape to measure the internal height, from the top of the window to the sill. Again, ensure the measurement is taken at the narrowest point, as Velux windows can have a slight taper at the sides.

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an open window in a white room with skylights
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Height Measurement Tips

When measuring the height, ensure the measurement is taken at the same level as the window's glazing bar. If your window has a center pivot, measure the height at the glazing bar level. For top-hung windows, measure at the bottom of the window, where the sill meets the frame.

For Velux windows with a fixed skylight, the height is measured from the top of the frame to the bottom of the frame.

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Once you have the width and height measurements, you can use them to determine the size of your Velux window. Velux windows are typically labeled with their internal dimensions, so you can use your measurements to find the perfect fit for your window accessories or replacement parts.

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Fenêtres de toit VELUX – Apportez lumière, air et espace
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Remember, accurate measurements are key to ensuring a perfect fit for your Velux window. If you're unsure about any aspect of the measurement process, don't hesitate to consult the Velux website or contact a professional for assistance.

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