Securing Your Windows
A third of burglars get in through a window.
If you are replacing windows, take the opportunity to install new ones that are certified to British Standard BS7950 ‘Windows of Enhanced Security’ and consider using laminated glass, particularly in ground-floor and accessible windows, as this is much harder to break.
Otherwise, window locks that can easily be seen from outside may put some thieves off, because the thief would have to break the glass and risk attracting attention. And even if they do break the window, they still can’t open it so risk cutting themselves climbing through the broken glass.
Home security and DIY shops sell inexpensive, key-operated locks to fit most kinds of windows.
You may need more than one window lock, depending on the size of the opening you need to secure. Fit window locks with keys to all downstairs windows and windows that are easy to reach – for example, those above a flat roof or near a drainpipe.
Even small windows such as skylights or bathroom fanlights need locks. A thief can get through any gap that is larger than a human head.
Remember to keep windows locked. Remove the keys and keep them out of sight in a safe place.
Louvre windows are especially vulnerable because thieves can easily take the slats out of the frame. Glue the slats into place, and fit a special louvre lock. Better still, replace them with fixed glass.
Before fitting locks to PVC-U or metal windows, talk to the installer to make sure this will not affect your warranty.
Consider fitting security grilles to vulnerable windows - but only if these windows are not escape routes in case of fire. Many DIY shops now sell decorative wrought-iron grilles.
Casement locks make it harder to open windows without the correct key.
Fanlight locks have a metal bolt to secure the metal arm used to open and close the window. Ideally, though, you should not rely on these locks - fit a casement lock too.
The lock shown here locks the two windows together. A more discreet version is embedded into the wooden frame. Or there are devices to stop the window opening beyond a certain limit
Information extracted from http://www.crimereduction.gov.uk|