Fitted from the inside.
A removable screen on the outside of the opening sash. You reach through the open window to put it on and to take it off — so on a mid-rise nobody needs a ladder, a lift, or a contractor.
Held by spring clips. Fitted from the room.
Stainless spring clips on the window frame hold the screen frame. You see them from inside when the window is open.
Open the window, hold the screen by its frame with the mesh facing out, and press it home until the clips hold it and it sits flush.
Open the window fully, free the screen from the clips and lift it into the room.
Each screen is built to its opening and tagged with that opening's number, so it goes back where it came from.
The fastener, and the weave.
A real screen, close enough to count the mesh. The spring-loaded metal fastener on the side of the frame is the part that gives when you press the screen home, and gives again when you take it out.
The mesh is fine enough to stop insects and open enough that, from inside the room, you look through it rather than at it.
Outside the sash, so the sash swings clear.
The window opens inward. The screen is on the outside. So the sash swings fully into the room, with the screen still in place.
The mesh is 18 × 16: eighteen strands to the inch in one direction and sixteen in the other. That is the standard insect weave. The openings are small enough to stop flies and mosquitoes and large enough that air moves through and the view stays clear. Charcoal is standard because a dark mesh is the one the eye looks through rather than at.
Nothing to slide, and no screen swinging out over a terrace. A fixed light has no opening sash, so it takes no screen. A terrace door does: the same exterior frame, made to the leaf.
Our air, water and structural tests are run without the insect screen, and the reports say so in as many words. The screen sits outside the rated assembly, so fitting one does not move a rating on this site.
The other half of that is just as plain: we do not publish a solar heat gain or a visible transmittance figure for a screened window, because none has been certified. Every optical figure on this site is for the window.
Once a year, a soft brush.
Brush the mesh with a mild soap solution and rinse at low pressure. Store a screen flat — never leaning against a wall, which warps the frame. If a clip loses its spring or the mesh tears, we replace it like for like against the opening number.
Screens on your schedule?
Mark the openings that get one and send the schedule with your plans.