Sew them on 🪡

Sounds silly, but you can sew them with extra durable thread or even use some of the nylon to tie them with a thick needle. If you know they’re disposable or reusable, give this a go!

If you don’t like that idea, instead of pegs, use clamps, can’t find a link but I used them in film backdrops and they’re super strong.

If it’s the soffit that is the problem, 3M tape is good too. Assuming you’re in Aus.