Made-to-Measure Fly Screens UK: Order Online

Fly screens made to measure for your exact opening

A window that is just too wide, a sliding patio door, a crooked roof light or an arched top: not every opening fits a standard size. A made-to-measure fly screen from Moskera is cut and sewn to your own measurements, to the centimetre. You get a screen that follows the opening exactly, so a real barrier against mosquitoes, with no gap and no slack.

In practice, going custom changes three things. First the tension of the mesh: an oversized screen creases, and insects slip through those creases; an undersized one leaves a gap down one side. Then the seal at the bottom, the most common weak point of off-the-shelf sizes. And finally how long it lasts, because a taut mesh does not rub or distort. Fibreglass mesh, MagnetX™ magnetic closure, fitted without drilling in about ten minutes.

How to order a made-to-measure fly screen in the UK

The configurator above walks you through it in a few steps:

Choose the shape: rectangular, arched, round or asymmetric.
Set the type of opening: window, door, sliding patio door or pergola, roof window.
Choose the colour and the mesh: black, white, light grey or brown, with three levels of mesh transparency.
Measure according to your fitting method: each fitting (on the frame, inside the reveal, on the facade, with a top return) has its own measuring method, shown on screen. Not sure? Follow our guide to how to measure your opening.
Add to basket and order online: your fly screen is cut to your dimensions and delivered to your door.

Unsure about sizes? See which size to choose. Prefer a ready-made standard size? Those are in the configurator too.

Bespoke window fly screens

This is the most common request, and the one where the gap between standard and custom shows up fastest. Window frames are rarely true, especially in older housing: a few millimetres of difference between top and bottom is enough to leave a way in. A custom window screen is therefore built to your real measurements and held by a self-adhesive magnetic strip around the frame. No hook-and-loop on this model, nothing to drill, and it comes off without a mark at the end of the season.

It suits casement and sliding windows alike, single or double, and lifts off in seconds so you can clean the glass. It is the most requested model in rented homes, precisely because nothing is altered. See the magnetic window screen, from £29.99. For a roof window the fixing differs; we covered that case in our guide to a made-to-measure roof window screen.

Fly screens for doors, French doors and patio doors

On a doorway you use ten times a day, what matters is no longer just the fit but the self-closing seal. Our door models carry magnets down the full height: you walk through with your hands full and the screen shuts tight behind you. Standard sizes from 70 to 120 × 210 cm, and three custom formats beyond that (up to 150 × 230, up to 200 × 260, then no limit). See the magnetic screen door, from £29.99.

Beyond roughly 150 cm wide you move up a range. A custom sliding patio door screen then works as several panels joined by magnetic seams: from 1 to 5 separations and more, depending on how many walk-throughs you want. Two details make the difference at those widths: MagnetX™ magnets of 15 cm instead of 4, and galvanised steel gravity bars along the whole bottom edge, which stop the mesh lifting in the wind. The format runs to 600 cm wide and high, with an unlimited size beyond that. See the large opening range, from £99.99.

Awkward shapes: arched, round and asymmetric windows

Made-to-measure earns its keep on unusual openings, where no ready-made screen fits: rectangular (the most common), arched (rounded top, our original craft), round (bullseye, porthole) and asymmetric (trapezoid, different heights or widths, typical in loft conversions). On those shapes the cut is based on a precise survey: the configurator tells you which measurements to take in each case.

Roller, fixed frame or magnetic: which fly screen works in a British home?

Let us be straight about it: we do not make roller fly screens. It is a frequent question, and the honest answer depends on how you live with the opening, not on our catalogue.

A roller screen makes sense if you want the mesh to disappear completely for part of the year and you accept drilling to fit a cassette. Expect several hundred euros per opening, fitting included. A fixed frame suits a window you rarely open, but it screws on and you cannot walk through it. A magnetic fly screen needs no drilling at all, is walked through hands-free, comes off in minutes and stores flat out of season. That is what we make, and it is what makes sense on a daily doorway or in a rented home.

What a made-to-measure fly screen costs in the UK

The price depends on the type of opening and on the dimensions, not on a flat rate. Entry prices start at £29.99 for a window or a door, and at £99.99 for a large multi-panel opening. The exact price appears in your basket as soon as you confirm your configuration, and you order straight away online.

Two levers bring the bill down: quantity discounts (−10 % on 2 screens, −20 % on 4), and starting with the openings that are genuinely exposed rather than doing the whole house at once. We set out the real ranges, item by item, in our article on the price of a made-to-measure fly screen.

Why choose Moskera for a bespoke fly screen

Built to your exact measurements, with no middleman.
Fibreglass mesh, fire-retardant and UV-stable: it does not rust, does not yellow, and lasts 8 to 20 years.
Fitted without drilling (MagnetX™ magnets and adhesive hook-and-loop) in about ten minutes, fully reversible, without damaging your frames. See our fitting guide.
Quantity discounts: −10 % on 2 screens, −20 % on 4.
30-day money-back guarantee « 0 bites » (made-to-measure excluded).
4.86/5 from 1,052 reviews on the door range, 4.85/5 from 435 reviews on the large opening range.

Bespoke fly screens: common questions

How long does a made-to-measure screen take?

Configurable models can be ordered directly online. For a special configuration, describe it in the configurator's comment box: we make it to measure.

How do I measure my opening?

It depends on your fitting method. The configurator shows the exact method at each step, and our guide walks through how to measure your opening step by step.

How much does a custom fly screen cost?

From £29.99 for a window or a door, and from £99.99 for a large opening. The exact price appears in your basket as soon as you confirm your configuration, and you order straight away online.

What is the difference with a standard size?

A standard size works if your opening happens to land on a common format. As soon as it is a few centimetres off, the mesh creases or leaves a gap, and that is exactly where mosquitoes get in. Made-to-measure removes that compromise.

Do you make custom roller fly screens?

No. We make magnetic fly screens, drill-free and removable. A roller screen needs a permanently fitted cassette, so drilling and a much higher budget. If that is what you are after, better to know straight away. Want the full side-by-side? Read our retractable vs magnetic comparison.

Can it really be fitted without drilling?

Yes. The magnetic strip and the adhesive hook-and-loop go on without tools and without holes, and come off cleanly. It is all covered in our fitting guide.

Is it suitable for a rented home?

Yes, and that is the most common use case: nothing is drilled or altered, the strips leave no residue, and the screen moves house with you.

Which shapes are possible?

Rectangular, arched, round and asymmetric, for windows, doors, sliding patio doors, roof windows and pergolas.

Made to measure for British homes

British joinery is rarely a standard rectangle, and a lot of it you are not allowed to drill into. Here is what that means for the opening you are measuring.

Sash, casement and bay windows

Three shapes that off-the-shelf screens almost never fit:

Sash windows: the screen goes on the outer frame so the sash still slides behind it. Nothing is fixed to the moving part.
Casement windows: measured on the outer frame, which lets the window open outwards with the screen staying put.
Bay windows: each pane measured separately, or the whole bay covered in one piece with magnetic splits where you need to reach the handles.

The same applies to French doors, patio and bifold doors, and to Velux and other roof windows in a loft conversion.

Renting, or living in a listed building

Two very British reasons you cannot put screws in a window frame. Most tenancy agreements forbid drilling, and in a listed building or a conservation area you may not alter the joinery at all. A magnetic screen fixes to an adhesive strip on the frame: no screws, no holes, nothing to make good, and it lifts off cleanly when you move or when the inspection comes round.

uPVC, timber and painted frames

The strip holds on uPVC, painted timber, aluminium and render: the four you will meet in almost every British house. Wipe the frame down and let it dry before fitting; on a cold or damp day, warm the frame gently with a cloth first, as adhesive grips far better above about 10 °C than it does on a damp winter morning.

Midges, mosquitoes and the rest

The weave is tight enough for mosquitoes and houseflies, and fine enough to stop midges, which matters far more in the Highlands and the west of Scotland than most catalogue screens admit. It still lets the light and the air through, so it can stay up all summer without darkening the room.

Delivery and returns

Standard sizes are dispatched within 24 to 48 hours and arrive in 5 to 7 working days with Royal Mail. Made-to-measure is manufactured to your dimensions first (up to 7 days), then the same 5 to 7 working days. Delivery is free on orders over £25.

Standard sizes can be returned within 30 days. Made-to-measure cannot, since it is cut to your numbers and fits no other window. Measure twice, and use the guide above if your opening is a bay, an arch or set deep in a reveal.

Rear extensions and bi-fold doors

The most common new opening in a British house is not a window at all: it is the three to six metre span of bi-fold or sliding doors added to the back of the kitchen. Folded right back, the whole span is open, and that is exactly the width an off-the-shelf screen cannot cover. A made-to-measure panel is cut to the full clear opening, so the doors stay stacked open on a warm evening and the flies stay in the garden.

Two numbers matter when you measure a bi-fold. The first is the clear width with every leaf folded back, not the width of a single leaf. The second is the height at the track, which is often a centimetre or two lower than the frame because of the running gear. Take both, and take them at three points across the span: extensions settle, and few openings are perfectly square by the second summer.

Terraced houses and the through-draught

In a terrace or a two up two down, cooling the house means opening the front door and the back door together and letting the air pull through the hallway. That works beautifully and it also opens two routes into the house at once. Most customers in this situation order two panels of different sizes: a screen door at the back onto the garden, and a narrower one for the front, where Victorian door frames are often taller and slimmer than anything sold in a standard size.

Renting: nothing to make good at the end

Deposits in England and Wales are held in a government-backed protection scheme, and the usual argument at check-out is about holes, fixings and marks on the joinery. Our screens are held by an adhesive strip that follows the frame, so there is nothing to drill and nothing to fill. At the end of the tenancy the strip lifts off the frame and the panel goes with you to the next flat, where it will fit only if the opening matches, which is worth remembering before you order made to measure.

Box sash windows that open a hand's width

A box sash usually opens by sliding the lower sash up, and plenty of owners only raise it 20 to 30 centimetres, either from habit or because the cords are tired. You have a choice here. Size the screen to the opening you actually use and it is cheaper and quicker to fit; size it to the full travel of the sash and you keep the option of throwing the window wide open in July. Whichever you choose, measure the clear opening rather than the outside of the frame, and note whether the sash sits proud of the surround, because the adhesive strip needs a flat run of frame to grip.

Create your made-to-measure fly screen