Casement window stays

[MarkW]

Afternoon all!

The top-hinged casement windows in our office either swing wide open or bang shut at the slightest breeze, so I'm looking for a stay of some description to keep them on an even vent. I imagined that the internet would be awash with various self-adhesive plastic casement stays for just this purpose, but it seems that they are all metal ones that require drilling. That's not much good for us unfortunately, as by the time the landlord has authorised it and got it done it'll be winter.

Do any of the good folks on here know of such a gadget, and if so could you point me int he right direction?

Cheers!

[Mississippi Bullfrog]

Caravan stores will sell plastic latches for storage compartments. They'll probably need small screws to fit but nowhere near as big as the usual window furniture screws. You'd probably get away with decent double sided tape.