Window Fly Screens UK | DIY & Made to Measure Insect Screens

What Type of Window Fly Screens do I need?

Modern window fly screens are available in several styles to suit different window types, ventilation needs and installation preferences. Whether you need a discreet everyday insect screen or a removable system for seasonal use, we offer solutions suitable for both modern and traditional UK homes.

Framed window fly screen - as the name suggests, this screen is made in the shape of a rectangular or square aluminium frame (a bit like a picture frame) and fitted with a mesh. This sort of screen is generally placed onto the window frame to cover the open space when the window is open. Fixing options include magnetic, hinge or turn button.

Roller window fly screen - this screen operates in a similar way to a roller blind, but with side channels. A cassette with mesh is fitted to the top of a window frame and the side channels run vertically from the cassette to the window sill to guide the mesh as it is pulled downwards from the cassette. The screen is rolled down when the window is open and back to the cassette when the window is closed. The screen can be chain or non-chain operated.

Twin sliding window fly screen - this screen is similar to the secondary glazing concept. An outer frame/track is fitted into the window reveal and two framed insect mesh screens fit into the frame. Each screen covers half the width of the window with an overlap in the middle to create a seal. Both screens slide aside to allow access to the window.

Pleated window fly screen - as the name suggests, the pleated screen uses a mesh with a series of pleats rather than a flat mesh. The system consists of a top face fitted or reveal fitted channel which holds the mesh and side channels run vertically from the top channel to the window sill to guide the mesh as it is pulled downwards. The screen is pulled down when the window is open and back to the top when the window is closed.

FAQs for Window Fly Screens.

Which window fly screen is best for my window?

The best window fly screen depends on your window style, how it opens and how often you need access to the window handle. Framed fly screens are suitable for many sash, casement and standard windows. Roller fly screens are commonly used for roof windows and windows that need regular opening and closing. Sliding or pleated screens may be better for wider openings, double-opening windows or situations where a fixed screen is not practical.

Are fly screens suitable for sash windows?

Yes, fly screens can be fitted to many sash windows, including traditional timber sash windows and modern sash-style windows. Depending on the frame, reveal depth and how the window opens, a framed window fly screen is often a suitable option. The screen can help maintain ventilation while reducing the chance of flies, mosquitoes and midges entering through the open sash window.

Can fly screens be fitted to Velux or roof windows?

Yes, fly screens can be fitted to many Velux and roof windows. Roller fly screens are commonly used for roof windows because the mesh can be pulled down when the window is open and retracted when not needed. They are a practical option for loft rooms, bedrooms and upper-floor spaces where insects can enter through open roof windows during warmer months.

Can I fit window fly screens myself?

Yes, many of our window fly screens are available as DIY kits and are designed for home installation. Product pages include measuring information, fitting guidance and, where available, installation videos. If you prefer a custom-made option, you can also choose made-to-measure fly screens manufactured to your exact dimensions. For customers who would rather not install the screens themselves, a professional fitting service is also available across many areas of the UK.

Do window fly screens reduce airflow or natural light?

Modern window fly screens are designed to allow airflow and natural light through while helping keep insects out. High-visibility insect mesh minimises the visual impact of the screen, so rooms can still feel bright and well ventilated. Very fine mesh options, such as midge mesh, may slightly reduce airflow compared with standard insect mesh because of the tighter weave, but they offer extra protection against smaller insects.

What is the difference between standard insect mesh and midge mesh?

Standard insect mesh is suitable for helping keep out common insects such as flies, mosquitoes, wasps and larger bugs. Midge mesh has a finer weave designed to help stop much smaller insects, including midges, which are common in some rural, coastal and Scottish locations. If you are mainly dealing with normal house flies and mosquitoes, standard mesh is usually suitable. If midges are a problem, midge mesh is often the better choice.

Do you offer a window fly screen fitting service?

Yes, Streme offers professional installation through trusted fitting partners covering most areas of the UK. This can be useful if you have several windows to screen, unusual window shapes, larger openings or if you would prefer not to measure and install the screens yourself. You can contact the team for advice on whether fitting is available in your area.

How do I measure for window fly screens?

Each window fly screen product has its own measuring requirements, so it is important to follow the measuring guide on the relevant product page. In general, you will need to measure the opening, frame or reveal depending on the screen type and fixing method. Accurate measurements help ensure the screen fits correctly and provides effective insect protection.

Why buy from Streme?
- Supplying window fly screens since 2007
- DIY, made-to-measure and fitted options available
- Free UK mainland delivery on kits, screens and mesh
- 2-year warranty on all screens
- Powder-coated aluminium frames and high-visibility insect mesh
- Feefo Platinum Trusted Service Award winner

Window Fly Screens For Your Home