Back Door Security Your back door is often out of sight, so is potentially one of the most vulnerable parts of your home. To ensure good back door security, mortise locks are usually fitted to back doors, with an alarm for additional level of protection to complete peace of mind. You can also ensure your safety at back doors with door closers. Back Door Closers Door closer at back door ensures the security and your safety. You may walk through the back door with both hands holding the garbage bags. Sprung loaded door closers ensure your back door to be closed when you are outside the house to prevent intrusion, and eliminate the risk of forgetting to close the door after you get back into your home. It also acts as a cushion to a closing door, preventing you from getting injured as both of your hands are often occupied. Door Closer Type Concealed door closers are preferred to prevent corrosion and physical damage factors, as the door closers are exposed outside. Door Closer SizeThe wider and heavier the door, the larger the spring size of door closers required to control the door. Size 2-3 is recommended for normal back door. Back Door Hinges Plain door hinges are enough for back door, as it is not frequently used, but you need to make sure the door hinge material is rust and corrosion resistant, like brass, stainless steel and chromium with non-removable pins to prevent thieves from tapping out the hinge.Door size determines the number and size of door hinges needed, check here. Back Door Locks Mortise Locks You can regard the back door as first line of defense, same as the entrance door. Install a mortise lock which meets the European Standard (EN) fitting with door lever to ensure highest back door security. Deadbolt + Door Knob-set/Door Lever-setFor easier installation and more economical, cooperate a surface mounted key-in-door knob or door lever-set with a deadbolt. It is able to resist on normal intrusion of burglars. Standalone AlarmsIt is quite important to install an alarm at the back door, as your back door is often darker and out of homeowners’ and passengers’ sight. A standalone alarm can be in multiple purposes: to scare away intruders and provide you an early notice of any intrusion, so to gain time to call the police and wait for rescue in a safe place.