Custom insect screen: measure the opening accurately

What to check

Frame dimensions can vary across the opening; fitting style matters too. The exact item, substrate and room conditions should be assessed together. A universal fixing or a single photo cannot confirm suitability.

Preparation and next steps

Measure width and height in several places and photograph the profile and existing fixing method. Confirm the substrate, supplied parts, access and scope before work begins.

Identify which part of the screen needs replacing

A removable framed screen, a sliding screen and a retractable system are different products. First establish whether the existing frame will stay or an entire new assembly is needed. The visible opening, outside frame dimensions and the receiving channel are not interchangeable measurements.

Take a wide photo with the window open and closed. Add close-ups of profile corners, handles, tracks and screen attachments. If the old frame is available, photograph both sides. These pictures help identify the system, but they do not replace a final measurement before fabrication.

Prepare measurements that can be checked

• Label what you measured: the clear opening, receiving channel or outside of the old frame.
• Record width at the top, middle and bottom, and height at the left, centre and right. Keep each reading rather than averaging them yourself.
• Mark the start and end of each measurement on a photo, state the units and identify which side you photographed.
• Show obstructions such as a window handle, adjacent sash, shutter or limited access to a track.
• Do not subtract an allowance by eye. Working clearances depend on the chosen profile and mounting system.

New mesh or a complete new frame?

If only the mesh is torn and the frame is intact, mesh replacement may be worth assessing first. A distorted frame, broken corners or worn tracks need a separate assessment. Fresh mesh will not fix a screen that binds or leaves a gap. For a retractable screen, identify the model and check whether compatible parts are available.

The Andersen screen range by window type illustrates why systems are model-specific. This is not a recommendation of a particular brand; compatibility must be checked for your own window.

Questions before ordering an insect screen

Can I use the measurements from the next window?

Measure each window separately. Similar-looking openings can have different channels, profiles or handle positions. Label each window so its measurements stay together.

Should I remove the old frame for a photo?

Not if that means leaning outside or undoing unfamiliar fittings. Safe photos from inside the room are enough to start; discuss access and removal separately.

Are preliminary measurements enough for fabrication?

They help discuss the task and an indicative estimate. Before fabrication, confirm the system, final dimensions and who will take responsibility for the final measurement.

Understanding the prices

These are labour estimates, not a final quotation. Fixings, materials, removal, difficult access, a helper and additional jobs are agreed separately. Confirm the minimum visit charge and total before booking.

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