How to Measure Windows for Security Bars Correctly

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To measure windows for security bars correctly, record the width and height of the opening at several points, check the depth and any obstructions such as shutters, handles or sills, and note whether the bars mount inside or outside the frame. Take a photo of each opening and send the measurements with a sketch so the factory can plan the bars accurately before production.

Why accurate measurements matter

Security bars only work well when they fit the opening exactly. A bar that is too small leaves gaps, and one that is too large may not fit at all. Because every bar is made to measure in our factory, the numbers you send determine the final result. Careful measuring at the start saves time, avoids changes after production begins, and makes installation smoother for everyone involved.

Take your time with each window. Measuring once carefully is better than measuring quickly several times.

Tools you need before you start

You do not need professional equipment for a basic measurement. Prepare the following items:

A steel tape measure, preferably 5 meters or longer
A pencil and paper, or a notes app on your phone
A simple sketch of each window
A camera or phone for photos from the inside and outside
A helper to hold the tape at the far end of wide openings

Use the same unit, millimeters or centimeters, for every number you write.

Measuring width and height correctly

Measure the width at the top, middle and bottom of the opening, and record the smallest value. Walls are rarely perfectly straight, so the narrowest point is the one that matters. Do the same for the height, checking the left, center and right sides.

Measure the inside of the frame or the wall opening where the bars will sit, not the outer edge of the window casing unless the bars are meant to mount outside. Write down whether each measurement is inside or outside the frame so there is no confusion later.

Checking depth, obstructions and mounting position

Depth tells us how much room there is for the mounting brackets. Measure from the wall surface to the glass or to the window sash. Note anything that could interfere with the bars:

Roller shutters or their housing
Handles, hinges and opening mechanisms
Air conditioning units, pipes or electrical boxes
Window sills and tiles that stick out

Decide whether the bars will be fixed inside the opening or on the outer face of the wall. This choice affects the design and how the brackets are attached.

Taking photos and making a simple sketch

Photos help us understand the site faster than any written description. Take a straight-on photo of each window from inside and outside, and include a tape measure in one shot to show scale. Sketch the window as a rectangle, mark the measurements on it, and note any obstacles with arrows.

Label each sketch with the room name, such as living room or bedroom, so you can match the photos and measurements later when you send your request.

From measurements to production and installation

Once you send your measurements, we confirm the details, often by visiting the site to check. We then prepare a drawing and a written specification for your approval. After approval, the bars are produced in our factory on Rival Street in Tel Aviv and finished with hot-dip galvanizing or powder coating, depending on the design and location.

Installation follows the agreed plan. Because the measurements were checked before production, the bars arrive ready to fit the openings you described.

Frequently asked questions

Should I measure the window frame or the wall opening?

Measure the space where the bars will sit, which is usually the inside of the frame or the wall opening. Tell us clearly whether you want the bars inside or outside the frame.

What if my window is not a perfect rectangle?

Record the smallest width and height and note any angles or curves in your sketch. Photos from several angles help us see the shape accurately.

Do I need to measure again if the window has a roller shutter?

Yes, measure the shutter housing and note how far it projects, because it can limit the depth and mounting position of the bars.

Can I send measurements without a site visit?

You can send your own measurements with photos and a sketch, and we will confirm the details before production. Checking on site is recommended when the openings are unusual or the measurements need verification.

Common mistakes to avoid

The most common error is measuring only once at one point or mixing millimeters with centimeters. Always measure at several points and write the unit beside every number.

Our recommendation

Measure each opening twice, record the smallest width and height, and send photos with a sketch marking any obstructions. This simple habit prevents most fitting problems before production begins.

Summary

Accurate measurements, clear photos and a simple sketch give you the best result. Send them to us and we will confirm the details before making your bars.

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