u/Dear-Nail-5039

For several years, we've been using aluminium mosquito screen frames with emergency blankets attached to them as inexpensive external sun blockers. They work very well at keeping the rooms cooler, but because the frames are mounted in the window opening, it's a bit inconvenient to open the windows fully for ventilation.

I came up with a simple alternative: instead of mounting the mosquito screen frame inside the window frame, I mounted it directly onto the window itself.

To do this, I bent 1 mm aluminium strips to match the profile of the window and screwed them onto the mosquito screen frame, creating custom mounting brackets.

The result is simple, inexpensive, very stable, and much more practical because the sun screen moves together with the window, making it easy to ventilate the room without removing the frame.

South-facing, full sun, with air temperatures of 30°C, the room is 21.5°C all day.