Inner Door Security The security level of internal doors does not need to be as high as for external doors, if entrance door security is doing well. The consideration of inner door focuses more on safety, durability etc. Inner Door Closers Door closers are important on your family safety, to secure the disabled, elderly or your children from injury by a closing door and prevent the spread of fire and smoke when in fire accident. You need to aware of the below factors when choosing door closers for internal doors: Door Closer Type It is recommended to use surface mounted door closers as it takes very little time and least expensive to install. Door Closer Size The wider and heavier the door, the larger the spring size required to control the door. For inner door, size 2 should be enough. Inner Door Hinges Recommend to pick ball bearing door hinges for interior doors, as it is frequently used. Bearing door hinges increases durability of the hinge and tends not to make a creaking sound, as the ball bearings are placed between the knuckles to reduce fiction. For suitable door hinge size, check here. Inner Door Locks Knob Sets / Door Lever Sets Security is not the main concern for inner doors. Single latch lock can satisfy the requirement. Therefore door knob-sets and door lever sets are always the popular choice of houseowners, as it is economical and easy to install (surface mounted). Keep in mind that knob and door lever sets have variety of options on both sides: push-button, keyed or just a handle, depends on different function. Check here. Mortise Locks Cautious people pursue high security for inner doors also, it does make sense too, if burglars break through your front defense, a strong inner door lock may rescue you from delaying the thief from reaching you, so to gain enough time to call the police and wait them to arrive. Therefore, mortise locks are generally considered as another alternative for indoor door locks. Mortise locks often come with one latch and bolt with higher security. But what to remind is, the price of mortise locks are higher. The installation is more complicated – it is concealed inside the door and needed to cooperate with separate door levers and cylinders. Standalone AlarmsInstalling standalone alarms in single rooms is becoming more and more popular, as it completes inner door security solution. Besides the ease to install and is wireless, today’s standalone alarm are connected with your smart phone. You can activate/deactivate the alarm or receive notice when it is triggered through the smart phone.