Single-cylinder deadbolts (keyed on one side) will work fine for most situations. Double-cylinder deadbolts (keyed on two sides) are a good idea if you have a window near the deadbolt. For safety ...

Several steps to a full DIY home-security system will stop intruders in their tracks. Fitting a deadbolt is just one of those steps—and it's one of the quickest, easiest, and cheapest DIY home ...