Night latch for ventilation

[PeteMars]

Can anyone suggest a solution to this problem? Window company says they can't fit night latch to flush casements ... I can't believe it...

 

[crank39]

You can, they're just being lazy. You'd have to replace the keeps for profile specific ones along with a new mechanism with an offset mushroom

https://dgsgroup.co.uk/window/elite-espag-bars/elite-flush-casement/

You probably won't be able to buy these from DGS as you'll need to have an account but similar will be available elsewhere

 

[PeteMars]

Thanks! You are right about lazy...
Lots of options on that link so I'll have to find out what I need.

 

[foxhole]

Or fit this type of thing?