How to screen a balcony opening (renting): 3630mm x 1150mm, concrete + glass balustrade

[brittm]

Hi Bunnings Workshop team,

I’m trying to create a bug-proof “alfresco” zone by screening the open section of my upstairs balcony so we can leave the sliding door open without insects/cockroaches getting inside.

Opening size

• Width: 3630mm
• Height: 1150mm (measured from the inside balcony ceiling down to the bottom edge of the glass balustrade, where the glass meets the concrete below)

Balcony construction / surfaces

• Glass balustrade sits on top of a concrete upstand/half-wall.
• The area I want to screen is the open void above the concrete upstand (up to the ceiling).
• Side returns/walls are concrete.
• The ceiling surface I can access is the inside balcony ceiling (there’s a recess on the outer edge, but it’s not practical/safe to use).
• Balcony floor is timber decking, but I’d prefer the screen to stop at the concrete upstand line below the glass, not run down to the floor.

Constraints

• We rent, so I want something strong but also removable later.
• I’m OK with a small number of screw holes (can patch), but I’d prefer to avoid adhesive-only solutions that can damage paint or fail in heat/humidity.
• Needs a good seal (minimal gaps) and should handle normal wind movement.

Options I’m considering (haven’t bought materials yet)

1. Wire-hung mesh “curtain”: flyscreen mesh hung from a tensioned wire fixed to the inside ceiling, then sides/bottom mechanically clamped to concrete with battens/strips.
2. Aluminium flyscreen frames + spline: build 2 (or 3) framed panels and mount them around the opening; possibly add a centre mullion/post if using 2 panels.

Questions

1. For a 3630mm wide opening, which approach is more robust and easiest DIY: wire-hung mesh or framed panels?
2. If using framed panels: could I make one full-width frame, or would you recommend two panels (~1815mm each)? If two, what’s the best way to do the centre join/mullion (timber vs aluminium joiner) and fix it to concrete cleanly?
3. If wire-hung mesh: what’s the best way to seal and secure the bottom edge at the concrete upstand line below the glass (without leaving gaps)?
4. Any recommended renter-friendly concrete fixings (anchors/screws/brackets) and seals (foam/brush strip etc.) to minimise gaps?

Happy to add photos or a rough sketch if helpful.

Thanks!