How Is a Custom Fly Screen Made? From Your Measurements to the Parcel

A custom fly screen is made to order from just three pieces of information: the shape of your opening, its dimensions to the millimetre and the fixing you choose. The fibreglass mesh is cut to your exact measurements, assembled with its magnetic or velcro fixing, checked, then shipped within 6 to 9 working days. Nothing else is asked of you, and that is what surprises people: how can a product made for your window be so simple to order?

This article opens the workshop doors. Understanding how your fly screen is made also means understanding why made-to-measure is neither slower nor more expensive than you might think, so you can order with complete peace of mind.

Made-to-measure is not a luxury, it is a manufacturing method

A standard fly screen comes off a production run: fixed dimensions, made in advance, available straight away. A custom fly screen uses the same mesh and the same fixing, but cut for your opening, at the moment you order. The difference is not in the product itself: it lies in when it takes its dimensions. If you are still weighing up the two, our guide on how to choose a fly screen asks all the right questions.

At Moskera, made-to-measure costs the same as the equivalent standard size, because making to order avoids stock and unsold products. What actually drives a price up or down is explained in our article on custom fly screen prices.

What changes	Standard	Made-to-measure
Dimensions	Fixed catalogue sizes	Your measurements, to the millimetre
Shapes	Rectangular only	Arched, round, triangular, hexagonal, asymmetric
Shipping	Within 24 to 48 hours	After 6 to 9 working days of production
Best for	Windows and doors in common sizes	Roof windows, sliding doors, conservatories, older or unusual frames

Step 1: your measurements, the only thing we ask of you

Everything starts with measuring. It is the one step where you play a part, and the only one: measure the width and height of your opening to the millimetre, without rounding. Our measuring guide shows you exactly where to place the tape depending on your type of window or door.

You then enter these measurements in the configurator, which does the rest: it knows the product rules and applies them for you. An arched or round shape automatically switches to a velcro fixing, and so does a roof window, because the mesh sits at an angle there. It is impossible to build a combination that would not work: if an option does not suit your shape or type of opening, it simply switches itself off, with an explanation.

Unsure about a measurement, or dealing with an unusual opening? Write to customer service before confirming your order: it is the right moment to ask, and the answer spares you any unpleasant surprise.

Step 2: cutting the mesh, to the millimetre

The mesh that goes to cutting is an E-glass fibreglass weave, woven at 18×16 threads per inch and rated M2 for fire resistance. This weave is the product's sweet spot: tight enough to stop mosquitoes and flies, open enough to let air flow and light through. Its full technical specifications are detailed on a dedicated page.

The workshop cuts this mesh to your exact dimensions, just as you entered them. This is the heart of made-to-measure: the product does not roughly fit your window, it is made for it from the very first second. And the millimetre is no stylistic flourish: a mesh cut too short leaves a gap for insects, one cut too large puckers and closes badly. The cut is exactly as precise as your measurements, which is why step 1 matters so much.

Step 3: assembling the fixing

The edge of the mesh then receives its fixing, the one you chose at step 1. Four magnetic corners in most cases: it is the product's signature, the feature that lets you fit and remove the mesh in a single movement. Or velcro all the way round, for special shapes and roof windows, where the mesh sits at an angle and needs continuous hold.

This assembly is what sets a manufactured fly screen apart from mesh cut off a roll: the fixing is sized together with the mesh, for your opening, not added as an afterthought.

Step 4: quality check, packing and shipping

Before being packed, every fly screen is checked: dimensions matching the ordered measurements, complete fixing, even weave with no flaws. This check is what makes it possible to ship a one-of-a-kind product, made for a single window in the world, that still has to fit perfectly first time.

Allow 6 to 9 working days between your order and the shipping of a made-to-measure screen. Standard sizes, already made, leave within 24 to 48 hours. Either way, you receive a compact parcel with the mesh, its fixing and everything needed to fit it.

Arched, round, triangular: special shapes are our speciality

Porthole windows, arched transoms, triangular windows under a sloping roof, hexagonal or asymmetric openings: these frames give a house its charm and standard products their headaches. For a workshop that cuts to order, they change almost nothing: just one more shape to trace. Where standard would tell you "that doesn't exist", made-to-measure replies "send us the measurements".

The configurator accepts these shapes directly and applies the right fixing, velcro in most cases, better suited to a curved edge than a row of magnets.

And fitting? Around ten minutes, no drilling

Manufacturing stops at your door, fitting is yours, and that is by design: it is meant to take around ten minutes, with no tools and no drilling, thanks to a magnetic or velcro adhesive strip applied to the frame. The installation guide walks you through it for your exact setup.

It is also what makes the product reversible: if you rent, or if your needs change, everything comes off without a trace. The magnets even make it seasonal if you like: mesh taken down in winter, put back up in spring, in a few seconds and with nothing to re-stick.

Build my custom fly screen

What next? A mesh that lasts, parts you can replace

A well-maintained fly screen lasts 8 to 20 years. Fibreglass takes the seasons in its stride without sagging, and simple care keeps the mesh looking sharp year after year. Spread over its lifespan, a fly screen made to your dimensions is one of the best-value pieces of kit in the home: fitted once, useful every summer.

And if a part wears out before the mesh does, it can be replaced on its own: spare parts and replacement adhesive strips are available individually, no need to buy the whole screen again.

Vehicles, boats and openings that were never standard

Not every opening we cut belongs to a house. A campervan habitation door, a caravan window, a boat hatch, a garden room with an out of square frame: these are the jobs where made to measure stops being a preference and becomes the only option, because there is simply no shelf size that fits them.

The manufacturing steps are the ones described above, with one difference that matters. On a vehicle the fixing goes on the surrounding frame, never on the acrylic pane itself, and the panel has to close on its own, because a habitation door is opened dozens of times a day with both hands full. That is why the magnetic closure, rather than velcro all round, is the default choice on anything that moves. We go through the vehicle side of it in detail on our campervan and caravan fly screens page.

Frequently asked questions