Levering blocks
If the glass pane is secured, then the protection of the existing hardware is of course also to be recommended, so that levering out is clearly rendered more difficult. This is because unsecured hardware, and this is the majority of all windows and patio doors (also new), allow levering off in a few seconds.
Subsequently installed levering blocks are a rapid and low-cost method of retrofitting. According to window type and installed situation, HAVERKAMP offers special solutions for rooflights, sliding door systems, building entrance doors, casement windows and of course for turn & tilt windows as well.
