Standard glass used in our 'A'-rated windows
Double glazed unit composition: 28mm overall width : 4mm low iron glass / 20mm thermobar space / 4mm soft coat glass
Method - attack the window frame trying to lever the sash away from the frame. Starting with attack from the screwdriver & ending with the heavy duty crowbar.
We are able to demonstrate that there is great inherent strength in the window itself (steel reinforcing / 8 point locking / Police Approved Secure By Design lock etc.... as well as the glass strength.