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How to Replace Door Locks Your first protection is your door lock. It can stop unauthorised entry into your home. The locks may need to be replaced because of signs of wear and tear, or other situations such as moving into a new residence or a break-in. To begin, determine your cylinder size by measuring the distance between the adjustment screw and the center of the knob lock cylinder. This measurement will allow you to select the appropriate lock. Deadbolt If you're looking to ensure that your door is secure from burglars, it's a good idea to install a deadbolt. When the bolt is extended into the strike plate of the doorframe, it makes it much more difficult for an intruder to break through the door. A single cylinder deadbolt can be activated using an exterior key on the side and a thumb turn device on the interior. Deadbolts will only work only if it is correctly installed. The first step is to determine if the door has a hole to install deadbolts or requires drilling. Mark the location of the hole for the deadbolt on the surface of the door by using the template supplied with your lock installation kit. Utilize your tape measure to determine the height of the deadbolt. Then, mark this height on the edge of the door. You can then use a speed square to draw an even line across the mark you made for the bolt hole. Then by using a power drill, bore out the hole until it is on the opposite side of the door. This may take a while. Then, repairmywindowsanddoors.co.uk down the hole and along the edge of the door so that it's smooth. It's also an excellent idea to stain or paint the door at this point. Once the door is ready take off any screws that are visible on the existing deadbolt. This will reveal the front and back assembly of the deadbolt as well as the bolt inside. Then, unscrew the bolt and replace it with a brand new one that matches the door hardware. The bolt is typically attached to a set plate, which you will need to unscrew. After this is done, you will need to chisel the area for the strike plate that is on the door frame. If your strike plate is not in alignment it could be because the previous installer didn't mortise it properly or that a weatherstripping changed the strike position. You'll need to re-mortise the strike plate and perhaps even the deadbolt to fix the issue. Close and lock the deadbolt after you've completed this process. Test the deadbolt by closing and locking it after the bolt has been extended into the strike plate. Knob If a door knob is damaged, it can make your business or home less secure. It could also make opening or closing the door more difficult, so it is recommended to replace the knob. Replacing knobs is an easy DIY task that should not take more than 30 minutes to complete. Use a screwdriver or pliers to remove any old knobs or handles. Be careful not to damage the other components of the door. Before you start you'll need to spray WD-40 or some other dry lubricant on the mechanism of the knob for your door. This will allow the new lock to slide smoothly when you turn it. It's essential to select a quality knob and handle that is compatible with your doors currently in order to ensure that the lock is operating properly. If you don't have a matching knob, you'll need to buy an additional doorknob and latch plate. Before you begin replacing the knob, examine the old knob to determine what screws are keeping it in place. If there aren't any screws, you can use the screwdriver to wedge the cover plate between the screws plate that is hidden. After taking the knob off examine it for indications of damage and rust. If the knob shows any dents or marks, you'll have to clean it. Otherwise it shouldn't need any major work. Install the new knob. You must first study the two knobs to ensure that you've selected the correct one for your door. You'll need to choose one with an extended rod designed to interlock with the rod mechanism on the second knob. Once you've positioned the new knob over the door's hole and then carefully place it in the latch. Test the spring by pressing it repeatedly. The latch should spring back up every time. Then, you can install the new knob and lock it to the rod mechanism on the first knob. Then, thread the other long screws from the knob's interior through the cylinder hole on the doorknob on the outside and lock it in place. Latch A latch is a piece of metal that extends through the doorjamb to secure it shut. It is operated by a handle or knob on the inside of the door or a thumb turn on the outside side of the door. A deadbolt is a device used to secure a latch and prevent intruders from breaking through the glass of the door. It also helps protect against intentional or accidental closing by pets or children. A latch can be installed with single cylinder deadbolts or double cylinder deadbolts according to the security level you prefer. Installing a deadbolt is the same as installing a latch but there are some differences. To make sure that the new lock is compatible first, take a measurement of the setback on the doorjamb using the tape measure. The setback is measured from the edge of the doorjamb all the way to the center of hole for the latch plate. The standard setback is 2 3/8 to 2 ¾ inches. If your setback is greater, you may need to purchase a latch that is longer from a hardware or locksmith store. Next, make a hole for the latch plate into the edge of the doorjamb. Use a chisel and make the mortise for the latch. Make sure the hole's depth is enough to allow the faceplate to be flush with the doorjamb. Place the strike plate in place to make sure it's placed correctly. If the strike is set too high, the door may be pushed into or pressure applied to it using a crowbar or tire iron. This could also cause cracks in the doorjamb. This can be repaired by drilling a new hole into the doorjamb and then chiseling the core out of the old one. Installing the new strike plate is the final step. This can be accomplished by screwing the new plate over the existing screwholes. Use wood putty then to fill in any existing bolt holes or screw holes which aren't going to be used. Once the putty has dried then sand it to an even finish. Strike The piece of metal that connects the deadbolt and latch when the door is shut is an electric strike. It is an essential component of the lock's overall security, as it prevents the door from opening and gives an additional barrier to force or kick. If a door is equipped with an electric strike, it can be opened using a key or the control unit that governs the electrical impulses. In the past, putting in an electronic strike required cutting a portion of a doorjamb to release the latchbolt of a cylindrical lock from the pocket within the strike. This is not only unattractive however, it also exposes the latchbolt mechanism and keeper to unauthorized users. Recently, several electric strikes manufacturers have developed a “No Cut” type of strike that does not require a cutout in order to operate. The strikes have a unique design that allows the latchbolt and keeper to slide into the pocket without damaging the doorjamb's faceplate. The strike has an internal ramp that lifts the latchbolt and keeper when it receives an electrical signal from a reader or controller. The keeper and latchbolt are pushed higher up the ramp due to retraction. When the door is closed, the deadbolt is retracted and the latchbolt retracts into the keeper. Installing an electric strike can be an easy process, particularly in the case of replacing a strike on an existing door. If you're upgrading an existing access control system to an electric strike, you must ensure that your new system is compatible. You will also need to ensure that the strike is properly wired to your access control system and is configured for fail-safe operation. Upgrade your strike plates to high duty strike plates to block unauthorized entry. These plates can be fitted with up to six screws of three inches instead of the standard two screws of three-fourths inches. These screws are longer and make breaking the frame to reach the thumb turn piece on a single deadbolt cylinder more difficult.