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How to Replace Door Locks Door locks are the first security measure against unauthorized access to your home. The signs of wear and tear, and also instances like moving into a new home or break-ins, can necessitate the need to replace your lock. To begin, determine the size of your cylinder by measuring the distance between the adjustment screw and the center of the cylinder knob. This measurement will enable you to buy the right lock. Deadbolt Installing a deadbolt can be a ideal way to secure your door from intruders. When the bolt is extended into the strike plate of the doorframe, it makes it harder for an intruder to break through the door. A single cylinder deadbolt is activated using an exterior key on the side and a thumb turn piece on the interior. A deadbolt is only effective when it's properly installed, though. It is first necessary to find out if the door has an existing hole for a deadbolt, or if you'll need to drill it. Mark the location of the hole to install the deadbolt on the exterior of the door by using the template supplied with your lock installation kit. Use your tape measure to determine the height of the deadbolt. Then, mark the high point on the outside of the door. You can then use the speed square to draw straight lines across the mark you made for the bolt hole. Then using door lock repairs chesham Repair My Windows And Doors , bore through the hole until it reaches the opposite side of the door. This could take a bit of time. Sand the hole and the edge of the door to make it smooth. At this point, it's a good idea also to stain or paint your door. Remove any screws that are visible from the deadbolt. This will reveal the back and front assemblies of the deadbolt and also the bolt that is inside. Remove the bolt and replace it with the new bolt to match your door hardware. The bolt is typically connected to a set plate, which you will need to unbolt. Then, you'll need to chisel the door frame for the strike plate. If your strike plate is out of alignment, it could be because the previous installer didn't mortise it correctly or a weatherstripping has changed the strike position. It is necessary to re-mortise your strike plate and perhaps even the deadbolt to correct this problem. Close and lock the deadbolt when you've completed this process. Make sure that the bolt extends into the strike plate then test the key to ensure it opens and closes smoothly. Knob It could make your home and business less secure when the door knob is worn. It may also make it harder to open or close the door, making it an ideal idea to replace the knob. Replacing knobs is an easy DIY project and shouldn't take longer than 30 minutes to complete. Use a screwdriver or pliers to remove any old knobs or handles. Be careful not to damage other components of the door. Before you start you'll need to spray WD-40 or another dry lubricant onto the mechanism of the knob on your door. This will help the new lock to slide smoothly when you turn it. To ensure that it operates properly, it's important to choose the right knob and handle to are compatible with your doors. If you don't already have a matching doorknob then you'll have to buy a replacement. Before you begin the replacement process, look over the knob you replaced to determine which screws are keeping it in place. If there aren't any screws you can make use of a screwdriver and wedge it between the cover plate and the screws plate hidden and pop it off. After you've removed the old knob, examine it for indications of damage or rust. If the knob is damaged or has scratches or marks it's time to clean it. Otherwise it shouldn't require any major work. It's time to install the new one. It is important to first look over the two knobs to make sure that you've chosen the right one for the door. You'll want to pick one that has an extending rod that is designed to lock with the rod mechanism of the second knob. Once you've put the new knob into the hole then slide it into the latch. Thread the latch plate screws down and test the spring by pushing down on it repeatedly. The latch should spring up every time. Then, put in the new knob and lock it with the rod mechanism of the first knob. Attach the other long screws from the knob's interior through the hole in the cylinder of the doorknob outside and lock it in place. Latch A latch is a piece 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 exterior side of the door. A latch can be secured using deadbolts to stop intruders from breaking in through the door's glass. It also provides protection from accidental or intentional closing of the door by children or pets. It is possible to install a latch with either a single-cylinder deadbolt, or a double-cylinder deadbolt, depending on your preferred level of security. Installing a latch follows the same steps as installing a deadbolt, however, there are a few variations. First, measure the setback of the doorjamb by using an instrument to make sure the new lock will fit. The setback is the distance from the edge of the doorjamb, to the center of the hole for the faceplate of the latch. Setbacks for standard latches are 2 3/8 to 2. ¾ inches. If you have a greater setback, you may need to purchase a more substantial latch from a hardware shop or locksmith. The next step is to drill an edge bore hole into the doorjamb for the latch plate. Use a chisel for chiseling out the mortise for the latch making sure it's large enough for the faceplate of the new latch to be flush with the doorjamb. Tape the strike plate in the correct position to ensure it's placed correctly. If the strike is too high, you can kick the door in or apply pressure with an iron tire or crowbar. This can also cause the doorjamb's to crack. This can be corrected 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 last step. This can be done by screwing the new plate over the existing screwholes. Use wood putty then to fill in any old screw holes or bolt holes which aren't going to be used. After the putty has dried, sand it smooth for professional results. Strike The piece of metal that is inserted between the latch and deadbolt when the door is closed is an electric strike. It is a crucial component of a lock's overall security, since it seals the door and offers additional resistance to force or kicking applied to the door. If a door is equipped with an electronic strike, it will be opened only with an entry key and a control unit that regulates its electrical impulses. In the past, installing an electronic strike was as simple as cutting a piece of a doorjamb, which would release the latchbolt of a cylindrical lock from the pocket within the strike. This is a drawback when it comes to the appearance of an opening and also exposes the mechanism of the latchbolt and keeper to unauthorized users. Recently, a variety of electric strike manufacturers have created a “No Cut” kind of strike that doesn't require a cutout to operate. These strikes utilize a special design to allow the latchbolt and keeper to slide into the strike pocket without marring the doorjamb faceplate. The strike has an internal ramp that lifts the keeper and latchbolt when it receives an electrical impulse from a controller or reader. The retraction of the keeper and latchbolt raises them on the ramp, locking the door. When the door is closed the deadbolt remains at a lower position and the latchbolt retracts into the keeper. Installing an electric strike can be an easy task, especially in the case of replacing the strike on a previous door. However, if you are upgrading to an electric strike in an access control system, you'll need to make sure your new system is compatible with the kind of lock you've chosen to install. It is also necessary to make sure that the strike is connected to your access-control system and set up to function in a fail-safe manner. Upgrade your strike plates to heavy duty strike plates to block unauthorized entry. These plates can be fitted with up to six screws of three inches instead of two screws of three-fourths inches. These longer screws make it harder for someone to break the frame and reach inside to turn the piece that turns the thumb of a single deadbolt cylinder.