When you have a side door with a window that has a single-sided deadbolt lock you are vulnerable. This is because anybody who wants to gain access can simply break the window with his hand and access the thumb-turn to unlock your door. Same goes for businesses. Most businesses would have a mortis on both sides, but some businesses only have a thumb-turn on the inside making a break-in easy. We always recommend our clients who have windows on or close to a door that has a single-sided deadbolt to install a double-sided lock. Commercial clients should do the same. We can come to your business and replace the inner thumb-turn mortis lock and put a regular mortis instead.
Another precaution one can use is to install a doorplate thus making it harder for a burglar to take a crowbar and force your door open. Doorplates are not very expensive and installation doesn’t usually take a long time (depending on the door composition). Complete Locksmith can do this for you.