How to measure a window opening? Practical Guide 2024

When planning to install windows for the first time or replace old woodwork, a key step is to accurately measure the window opening. Correct measurement is of paramount importance for the proper fit of windows, ensuring their functionality and aesthetics. In this article, we will provide you with comprehensive tips for measuring a window opening, so that performing this task is neither scary nor complicated for you.

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Why are accurate window measurements so important?

Properly measuring a window is key to ensuring that it functions properly and fits into the window opening. A window that is too large or too small can lead to difficulty opening and closing, sealing problems and even jamming. Accurate measurements also make it possible to fine-tune additional components, such as blinds or mosquito nets. This is why it is so important to take measurements before buying a new window or ordering additional components.

What tools do you need?

Before measuring the window opening, it is a good idea to prepare the appropriate tools, such as a tape measure, level, pencil and paper. Make sure the tools are in good condition and ready for use.

How to measure a window opening? A practical guide

How to measure an empty window opening in width?

The first step in measuring a window opening is to measure its width. Concentrate on measuring in several places, both at the top, middle and bottom of the hole. Record these dimensions and calculate the average value to get an accurate measurement of the width of the hole.

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How to measure an empty window opening for height?

The next step is to measure the height of the window opening. As with the width, measure the hole in several places and calculate the average value. Make sure the measurement is accurate to avoid errors in ordering windows.

How to measure an empty window opening for depth?

In addition, if you intend to install blinds or shades, it is worth measuring the depth of the opening as well. Concentrate on measuring from the inner edge of the hole to the outer edge to get an accurate depth measurement.

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How to measure a window without carbs?

For carbless openings, that is, window openings without a protruding carb, there are several important steps to take accurate measurements. First of all, measure the width of the opening from one wall to the other, also taking into account any enclosures. Then, measure the height of the opening from top to bottom, also taking into account the enclosures. Remember to subtract a certain number of centimeters from the dimensions of the opening to ensure adequate installation clearance and allow the window to be properly seated. It is usually between 2 and 4 cm on each side, with a larger gap better left than a smaller one.

So if you have a window opening of 200 cm x 200 cm, it is safe to order a window of 196 x 196 cm.

How to measure a window with carbs?

In the case of a window with a node, i.e. with a protrusion to the outside, measurements will vary slightly. First of all, measure the width of the opening at the narrowest point and add our 4 cm just to be sure.

Then, measure the height of the opening from the outer sill to the lower edge of the eaves and add 4 cm again.

Here again, if you have a window opening of 200 cm x 200 cm with carbons, it is safe to order a 196 x 196 cm window.

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Summary

Accurate measurement of the window opening is extremely important for proper window fitting. Remember to prepare the appropriate tools, measure the width, height and depth of the hole and take into account the installation gap. With these tips, you will be able to measure the window opening independently and efficiently.