In most houses there are numerous points of entry an intruder might use. Just having an expensive mortise lock on your front door really isn't enough, and you need to ensure that all possible entrances to your home are secure.
Front Door
A standard casement lock on a door will not stop an intruder for more than a few moments. A burglar will ring the doorbell and when there is no answer, a swift kick in the right place could have them inside in seconds. Fit a good quality deadlocking bolt (a mortise lock for example) and consider fitting rack bolts top and bottom, especially if you are away from home often. If you have a UPVC front door or are considering having one fitted, check that it has multiple locking points (most do).
Also consider fitting a strong security chain as burglars have been known to wait for the door to be answered before forcing their way in. Thankfully, this is not common, but a chain will certainly make lone occupants feel safer when answering the door at night.
Letterbox
Increasingly, thieves are using a method called fishing. This means that they will use a pole with a hook on the end to "catch" keys left on hallway tables. This could be you car keys, house keys or both. Never leave keys anywhere near the front door, unless they are secure in a drawer, etc.
Back and Side Doors
The back door is even more appealing to intruders as they can often work unseen, meaning that they can take their time. Your back door should be at least as secure as your front door, with good quality deadlocking bolts in place. Try to trim back any trees or bushes directly around the back or side doors, reducing the burglars ability to hide.
French Windows
Some older sliding french windows can be lifted out of their tracks, even when locked. Fit additional locks to the frame to prevent this. With wooden french doors, fit rack bolts top and bottom, close to where the two doors meet. This is the weak point of any double door.
Windows
Downstairs
Never leave windows open, no matter if you are just popping to the shops for 5 minutes. Fit additional locks to all windows, especially to the rear and side of the house. Rack bolts can be fitted to any wooden windows quite easily and you can buy locking systems for UPVC and Metal-framed windows. Make sure that any locks have removable keys, otherwise the burglar can just break the glass and unlock the window.
Upstairs
Most upperfloor windows will be safe (unless you leave ladders laying around) but any that can be reached by climbing a drainpipe or from a flat roof should be secured as you would with a downstairs window. If you think a downpipe could be used as a way to climb to a window, you can paint it with security paint. This clever substance remains slippery, making climbing very hard.
Louvred
Not many modern houses feature louvred windows, but some older houses might still have them. The individual slats of glass can be easily removed by bending back the metal frame that holds ...
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