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Roller Midge Screen - Window
Roller Midge Screen - Window
Roller Midge Screen - Window
Roller Midge Screen - Window
Roller Midge Screen - Window
Roller Midge Screen - Window
Roller Midge Screen - Window
Roller Midge Screen - Window
Roller Midge Screen - Window
Roller Midge Screen - Window
Roller Midge Screen - Window
Roller Midge Screen - Window
Roller Midge Screen - Window
Roller Midge Screen - Window
Roller Midge Screen - Window
Roller Midge Screen - Window
Roller Midge Screen - Window

Roller Midge Screen | Windows | Extra Fine 20x30 Mesh

SKU: RISW-RISWMIDGE

Our System 41 roller midge screen for windows is custom made to your exact measurements in our UK factory. Now using an upgraded 20×30 extra-fine mesh — finer than our previous 20×20 and the specification that reliably stops midges. The same slimline 41mm cassette hides the mesh completely when not in use.

Extra-fine 20×30 midge mesh — upgraded from 20×20, now stops midges reliably
Scotland and midge-prone areas — purpose-built where standard fly screens fall short
Hides away completely — 41mm cassette, invisible when retracted
Brush pile perimeter seal — no gaps around the edges
Custom made to your size — enter your measurements on the product page
Screw fix installation — drill and screwdriver only, most installs under an hour
5-year profile guarantee — aluminium cassette and frames covered
Read More

Roller Midge Screen | Windows | Extra Fine 20x30 Mesh

From £103.16
Enter Your Sizes
mm
mm
cm
cm
inches
inches
-25%
RRP
£137.54
RRP
Discounted Price
Your price
£103.16
Delivery: 10 to 15 working Days
Why Our Midge Screen

The right mesh makes all the difference.

Midges are a fraction of the size of common flies. A standard insect screen won't stop them. Our 20×30 midge mesh is engineered specifically for the job — in the same retractable System 41 cassette you can trust.

20×30 Threads/Inch Weave

Our finest standard mesh. The extra-tight 20×30 count creates gaps small enough to stop midges — the insects responsible for the notorious biting clouds of Scotland and rural coastal areas.

Brush Pile Perimeter Seal

The mesh alone isn't enough — midges will find any gap. Integral brush pile strips seal both side channels and the closing bar, creating a complete perimeter barrier with no way through.

Hides Away When Not Needed

The 41mm spring-loaded cassette keeps the mesh rolled away in winter and outside midge season — protected from UV, dirt and damage. Deploy it only when you need it.

Custom Made to Your Window

You enter your measurements on the product page. We hand-build every screen in our UK factory to those exact dimensions — no trimming, no gaps at the edges where midges could slip through.

No Chains — Child Safe

Entirely spring-operated with no cords or hanging chains. Simple to deploy and retract — pull the handle bar down, tilt to release. Safe for families in midge-season holiday lets and permanent homes alike.

Proven Since 1994

Over 30 years selling this system in the UK. Our midge mesh has been trusted by homeowners, holiday let owners and estate managers across Scotland and the rural north for decades.

20×30
Threads/inch — our finest weave
5yr
Guarantee on all aluminium profiles
10–15
Typical years customer lifespan
41mm
Cassette depth — barely visible
Measure, Order & Install

Straightforward from start to finish

Most customers fit their roller midge screen in under an hour. Here's how it works.

01
Measure Your Window
Measure the width and drop of your window opening. Download our Measuring Guide (PDF) for instructions covering all window types including tilt & turn, sash and windows without a sill.
02
Configure on the Product Page
Enter your measurements, choose frame colour (white, brown or anthracite grey), and select your cassette and side-guide fixing method. Confirm whether your window has a sill. Add to basket and order.
03
We Make It in Our UK Factory
Your midge screen is hand-built to your exact specification and arrives ready to install. Download our Installation Guide (PDF) in advance — you'll need only a drill and screwdriver.
04
Deploy When Midges Are Active
Pull the mesh down using the handle bar — it locks into the side channel catches. Tilt to release and it retracts into the cassette. In winter or outside midge season, it stays out of sight and protected.
How to operate a roller fly screen — video guide
Also Available

Midge screen for doors — same 20×30 mesh, same System 41

Need midge protection for a door as well as your windows? The same cassette and mesh are available for single and double door apertures. Note: the no-drill fixing option is not available with midge mesh.

Stop midges getting in. Open your windows all summer.

If you live in Scotland, the Highlands, a coastal or rural area, or anywhere midges are a seasonal problem, you'll know that a standard fly screen simply isn't enough. Midges — specifically Culicoides impunctatus, the Highland midge — are far smaller than common flies, capable of passing straight through a standard 18×16 mesh. Our roller midge screen uses a 20×30 thread/inch weave: the tightest standard mesh we offer, purpose-built to stop midges while still allowing fresh air to circulate through your open window.

Why Thread Count Matters for Midge Protection

A standard fly screen mesh has 18 threads per inch horizontally and 16 vertically. That's sufficient for flies, wasps and common UK insects — but midges are considerably smaller. Our 20×30 midge mesh has 20 threads horizontally and 30 vertically, creating apertures small enough to stop midges reliably. The finer weave does reduce airflow and light transmission slightly compared to standard mesh — but for anyone dealing with midge season in earnest, that's a trade-off worth making. Fresh air still circulates freely; midges do not.

A Complete Seal — Not Just a Fine Mesh

Fine mesh alone isn't the full answer. Midges will find any gap around the edges of a poorly fitted screen. Our System 41 addresses this with integral brush pile strips lining both side channels and the closing bar. When the mesh is deployed, these brushes press gently against the mesh surface and window frame, creating a continuous perimeter seal — the same principle used in professional draught-proofing. Every screen is also custom made to your exact measurements, so there are no gaps at the sides or base where midges could enter.

The System 41 — Retractable, Durable and Discreet

Our roller midge screen for windows uses the same System 41 cassette as our entire roller fly screen range. The 41mm spring-loaded cassette sits at the top of the window frame — measuring just 41mm front-to-rear and 51mm top-to-bottom. Side guide channels are 30mm wide and 22mm deep. All profiles are powder-coated aluminium in White (RAL9010), Brown (RAL8014) or Anthracite Grey (RAL7016), to coordinate with uPVC, timber and aluminium window frames alike.

When not in use — outside midge season, or when windows are closed — the mesh rolls back into the cassette automatically, protected from UV, dirt and physical damage. Customers regularly get 10 to 15 years of service from our screens. When the mesh does eventually need refreshing, it can be replaced independently without replacing the frames.

Available for Windows, Single and Double Doors

Our midge mesh is available for windows, single doors and double doors. All are made to measure in our UK factory. Note that the no-drill fixing option is not available with midge mesh — screw fix is required for all midge screen configurations, as the expanded end-cap mechanism used in no-drill screens is designed for the lighter standard mesh only.

Easy to Measure, Install and Operate

Download our Measuring Guide (PDF) and Installation Guide (PDF) before your order arrives. Installation requires only a drill and screwdriver and most customers complete fitting in under an hour. Operation is simple: pull the sliding bar down using the colour-coded handles — it locks into the side channel catches. Tilt the bar to retract. All screens above 400mm wide include our internal braking mechanism, which slows the recoil to prevent noise, damage or trapped fingers.

Tried and Tested Since 1994

We have been manufacturing and selling roller fly screens in the UK since 1994. Our midge screens have been trusted across Scotland, the Highlands, the Lake District and rural coastal properties for decades — in private homes, holiday lets and estate accommodation alike. Browse our full range of roller fly screens to find the right solution for every opening.

Why Midge Mesh?
20 × 30 threads/inch

Highland midges (Culicoides impunctatus) are far smaller than common flies and pass straight through a standard 18×16 fly screen mesh.

Our 20×30 weave creates smaller apertures — the tightest standard mesh we offer — specifically to stop midges while still allowing airflow.

Technical Specification
Mesh weave 20 × 30 threads/inch
Cassette depth 41mm front–rear
Cassette height 51mm top–bottom
Side channel width 30mm
Side channel depth 22mm
Max width 1800mm
Max drop 1700mm
Frame colours White · Brown · Anthracite Grey
Fixing method Screw fix only
Guarantee 5 years (profiles)

Frequently Asked Questions

Everything you need to know about our roller midge screen for windows.

Do retractable fly screens work?

Retractable insect screens are compatible with big and small apertures, ranging from windows and single doors to french doors and bi-fold doors. They are an excellent way to keep unwelcome pests such as flies, wasps and creepy crawlies at bay without obstructing your view. No matter the size of your window apertures, retractable fly screens will not let you down.

How easy is it to install a roller window fly screen from NewBlinds.co.uk?

It's surprisingly straightforward to install a roller window fly screen from NewBlinds.co.uk. It’s a simple case of screw fixing the bracket into which the cassette is clipped, and also screw fixing the two side channels. Each product comes with a user-friendly instructions guide that details step-by-step procedures on how to correctly fit your fly screen. Moreover, if you encounter any problems during installation, our customer service team is always ready to offer assistance.

Do your roller fly screens also include door fly screens for UK homes?

Yes, at NewBlinds, we do offer a range of roller door fly screens UK for our customers to choose from. A roller fly screen door uses the same components as a roller window screen, with the screen effectively turned on its side. The roller cassette is fixed at the side of the door, with guide rails on top and bottom. Single doors have a magnetic u-profile that the roller screen sliding bar snaps securely into. Double screens have a roller cassette on either side, pulling close to the middle, held in place with magnetic strips on each of the sliding bars. We ensure the utmost quality and durability in all our products so that you can enjoy a bug-free environment at your convenience in the UK.

What is the installation process for a door screen?

The installation process for a door screen from NewBlinds.co.uk is straightforward and user-friendly. Each of our door screens comes with a detailed step-by-step installation guide, and no professional experience is needed.

However, if you encounter any challenges or need any form of assistance during your installation process, our team is always ready to offer support. Remember that the proper installation of your door screen is imperative to its functioning and longevity.

How does a pull-down screen work?

A pull-down screen is a type of retractable screen that can be mounted on a window or door frame. In the case of a window, the screen is housed in a cassette at the top of the frame and can be pulled down manually to cover the opening. For doors, the cassette is usually situated at the side, and pulled across. When not in use, the screen can be retracted back into the cassette, providing an unobstructed view. When pulled down (or across), the screen is held in place with a locking mechanism, usually a magnet or latch, and can be released with a simple touch to retract the screen.

Can you have nets and blinds together?

Yes, you can have fly screen nets and blinds for solar protection and decoration together. Insect net curtains or blinds can be used as a protective layer for windows and can be paired with other types of window treatments such as roller blinds or curtains for additional privacy and light control. Usually one of the solutions would be fitted in the recess or against the window opening, leaving space for the other solution to be positioned further forward in the recess or outside of the recess.

Can you see through net blinds?

Yes, net blinds are made from a fine mesh material that allows light and air to filter through while still providing privacy and protection against insects. However, the level of privacy depends on the thickness, colour and tightness of the mesh weave. For example, white mesh actually more visible than traditional grey mesh, and thus provides more of a visual barrier. There are different grades of mesh depending on what you wish to keep out - standard fly screen mesh is least visible and provides the best view out, whilst anti-pollen and anti midge nettings are both tighter weave, and made of thicker fibres in the case of midge netting, therefore the view out is slightly less.

How do retractable fly screens work?

A retractable fly screen is similar to a roller blind. Instead of decorative or shading fabric, fly screen mesh is used and rolls onto the tube, which is contained in an aluminium cassette. The blind itself is spring-loaded, and operated using a handle on the hem bar. For a window configuration, the screen runs in side channels, left and right and is pulled down to the window sill which creates the 4th side of the frame. When not in use, the mesh screen rolls away out of sight into the cassette. The cassette and side channels are slim-line and discrete in appearance so the screen is not visually obtrusive when in use or when rolled away.

What is the difference between a retractable screen door and a sliding screen door?

Retractable screen doors feature a spring loaded roller cassette on one side of the door into which the mesh rolls up out of the way. The screen is pulled across using a sliding bar, running in top and bottom rails, and latches into a magnetic profile. Sliding screen doors are flat framed screens containing mesh which slides in top and bottom channels. Of the two types of screens retractable screens are more discrete and tend to be long lasting.

How long do retractable screen doors last?

Since the mesh of the fly screen is retracted when it is not in use, the mesh fabric is protected the majority of the year from UV radiation, dirt, and weather elements. As a result, retractable screens will outlast ordinary flat framed screens by a large margin. In the winter, there is no need to remove and store the screens. We have customers that are still using their retractable roller fly screens 10 to 15 years after they were purchased. Although life span will of course depend on usage and fair treatment.

Are retractable fly screens good?

In comparison to other types of fly screens, such as framed window fly screens, velcro mesh screens, mesh panel screens and hinged door fly screens, retractable fly screens is an excellent solution. The main benefit of retractable fly screens is that when the window or door is not open, the mesh screen itself rolls away onto the tube that is concealed in the cassette. Because of course, your door is closed the majority of the time, especially out of the summer months, the screen is rolled away the majority of the time protecting it from damage and build up of dirt and grime. Screens that are permanently in place and have the mesh exposed 365 days per year are at greater risk of damage, both to the frames and to the mesh itself.

Can I use roller blinds as a type of fly screen for my windows?

Traditional roller blinds are not designed to serve as fly screens. However, our Roller Fly Screens are an excellent solution for keeping insects out while allowing fresh air to circulate. These screens use a roller mechanism similar to a roller blind but feature a fly screen mesh housed in a slim-line cassette. They are easy to install and run within side channels, ensuring a secure fit that prevents insects from entering through the window. When not in use, the mesh can be retracted into the cassette for cleanliness and protection, making them a practical and unobtrusive choice.

Made in Our UK Factory
Every screen hand-built to your measurements. No trimming. Ready to fit.
5-Year Profile Guarantee
All aluminium cassettes and frames covered. Mesh replaceable independently.
Selling Since 1994
30+ years supplying roller screens to UK homes and businesses.
Free UK Delivery
On orders over £149. Your screen arrives ready to install — nothing extra to buy.
FSA & EC Hygiene Approved
Compliant for commercial kitchens, food prep & catering environments.

Hello

  • Blind Type:
    • Roller Insect Screens
    • Roller Fly Screens for Windows
  • Operation: Handle Operated
  • Screen Feature: Roller Screens
  • Screen Application: Windows
  • Fly Screen Type:
    • Custom Sized
    • Screw Fix
  • Mesh Type:
    • Insect Proof
    • Midge Proof
  • Frame Colour:
    • White
    • Anthracite Grey (RAL7016)
    • Brown
  • Made to Measure: Yes
  • Self Assembly: No
  File Name Size Date
Roller-Fly-Screen-Specification-Window.pdfDownload
243.55 KB 04/11/2023
Roller-Fly-Screen-Instructions.pdfDownload
244.35 KB 04/11/2023

You can view our video operating guide below. If you would like to read these instructions along-side the video, you can find them by clicking on the link. The link will open a new window.

roller fly screen operating guide

Roller Pet Screen for Windows and Child Safety

Child Safe By Design - Handle on Bottom Bar: Roller Pet Screen for Windows can be operated using discrete handle on the bottom rail. We call this ‘child safe by design’ as there are no looped cords or chains to operate the blind.


About Child Safety

At newblinds.co.uk, child safety is of paramount importance. If left hanging freely, chains and cords from blinds can pose a direct threat to children. For this reason, we are working towards all of our products being cord-less or chain-free and therefore “safe by design”.

Where it is not yet feasible to supply a product that is “safe by design”, we ensure that the product is fully compliant with Child Safety legislation. Not only do we ensure that, where necessary, our products are supplied/fitted with child safety cleats/devices, but we also
supply, free of charge, these items to our previous customers.

Click the link above to inform us of your requirements. To learn more about the BBSA ‘Make it Safe’ campaign and blind cord safety, you can watch the video below.

window blind child safety guide

 


 

 

 

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