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How to Replace Door Locks The first security measure is your door lock. It will prevent unauthorized access 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 house or a break-in. To begin, you must determine the size of your cylinder using the distance between the adjustment screw and the middle of the knob lock cylinder. This measurement will allow you to purchase the correct-sized lock. Deadbolt Installing a deadbolt can be a great way to secure your door from intruders. The bolt extends into the strike plate that is on the doorframe when locked, making it much more difficult for burglars to gain entry into the door. A single cylinder deadbolt is activated by an exterior key on the side and a thumb turn device on the interior. Deadbolts will only work if it is installed correctly. First, you must determine if the door has a hole that is suitable for a deadbolt, or if you'll need to drill it. Using the template that comes with your lock installation kit, mark the location of the deadbolt hole on the door's surface. Use a tape measure to determine the height of the deadbolt. Mark this measurement on the door's edge. Use the speedsquare to draw a straight line across the mark that you made for the bolt hole. Next, use a power drill to bore this area until the hole extends to the other side of the door. It may take a while. Then, sand the hole and along the edge of the door until it's smooth. At this point, it's a good idea to stain or paint your door. When the door is open remove any screws visible on the existing deadbolt. This will reveal the front and back assemblies of the deadbolt, and also the bolt that is inside. Then, remove the bolt and replace it with the new bolt to match your door hardware. The bolt is often connected to a set plate which you'll need to unbolt. After this is done then you need to chisel the area for the strike plate that is on the door frame. If your strike plate isn't aligned properly, it's likely because the previous installer didn't mortise it correctly or a weatherstripping was installed and changed the strike's position. To fix this problem it is necessary to remortise the strike plate and the deadbolt. Once this is completed Test the deadbolt by closing and locking it. Be sure the bolt is extending into the strike plate, and then test the key to ensure it closes and opens effortlessly. Knob If the knob on your door is worn out, it can make your business or home less secure. It could also make it harder to open or close the door, making it an ideal idea to replace the knob. It shouldn't take longer than 30 minutes. Use pliers or a screwdriver to take off any knobs or handles. Be careful not to damage other components of the door. Spray WD-40, or a different dry lubricant on the mechanism of your door knob prior to you begin. This will let the new lock slide effortlessly 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 proper operation. If you don't already have a doorknob that matches then you'll have to purchase a replacement. Before you begin the replacement, take a look at the knob that was previously used to see what screws are keeping it in place. If there aren't any screws you can use a screwdriver to insert between the cover plate and the hidden screws plate and pop it off. After you've removed your knob that was previously used, look it over for signs of damage or rust. If the knob shows any dents or marks then you'll need to clean it. Otherwise, it shouldn't require any major work. Install door lock repairs rickmansworth Repair My Windows And Doors . It is important to first look over the two knobs to ensure that you've selected the correct one for your door. You'll need to pick one with an extending rod that is interlocked with the rod mechanism of the second knob. Once you've put the new knob in the door's hole carefully place it in the latch. Test the spring by pressing it repeatedly. The latch should then spring back up every time. Then, you can install the new knob and lock it to the rod mechanism of the first knob. Attach the other long screws from the knob's interior through the cylinder hole on the doorknob outside and lock it in place. Latch A latch is a piece of metal that extends into the doorjamb to secure it closed. It is operated by a knob or handle on the interior side of the door or a thumb turn on the exterior side of the door. The latch can be secured with a deadbolt to keep intrusions from piercing the door's glass. It also helps protect against the accidental or deliberate closing by pets or children. A latch can be set using one cylinder deadbolt or double cylinder deadbolts based on the level of security you prefer. Installing a deadbolt is exactly the same as installing a latch, but there are some differences. To ensure that the new lock will work, first measure the setback on the doorjamb using an instrument such as a tape measure. The setback is measured from the edge of the doorjamb up to the center of hole for the latch plate. Standard setbacks are 2 3/8 to 2. ¾ inches. If you have a larger setback, you might need to purchase a more substantial latch from a hardware store or locksmith. Then, you'll need to make a hole for the latch plate at the doorjamb's edge. Use a chisel to chisel out the mortise of the latch and ensure it's deep enough for the faceplate of the new latch to sit flush with the doorjamb. Tape the strikeplate in place to ensure that it's positioned properly. If the strike is too high, you could knock the door down or apply pressure with the tire iron or crowbar. This can also cause the doorjamb to crack. This can be repaired by drilling a new hole into the doorjamb, then chiseling the core out of the hole that was previously made. Installing the new strike plate is the last step. This can be done by screwing the new plate over the existing screwholes. Then apply wood putty to fill in the old screw holes and the bolt hole that won't be used. Once the putty is dry then sand it to a smooth finish for a professional finish. Strike An electric strike is the metallic piece where the deadbolt and latch are engaged when the door is closed. It is a vital component of the overall security of a lock because it seals the door and provides extra resistance to kicking or force applied to the door. If a door is fitted 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, putting in an electronic strike was as simple as cutting a portion of a doorjamb, which would let the latchbolt of a cylindrical lock from the pocket within the strike. This modification is not only ugly and unattractive, but also exposes the latchbolt mechanism and keeper to uninitiated users. Recently, several electric strikes manufacturers have developed a “No Cut” kind of strike that does not require a cutout in order to operate. These strikes utilize a special design that allows the latchbolt and keeper to slide into the strike pocket without damaging the doorjamb faceplate. The strike has an internal ramp that lifts the latchbolt and keeper whenever it receives a signal from a reader. The latchbolt and keeper are lifted higher up the ramp due to retraction. When the door is closed, the deadbolt is retracted and the latchbolt is retracted into the keeper. Installing an electric strike is an easy task, especially in the case of replacing an existing strike door. However, if you're upgrading to an electric strike to use with an access control system, you will have to ensure that your new system is compatible with the model of lock you have installed. You will also have to make sure that the strike is connected to your access-control system and is set up to function in a safe manner. Upgrade your strike plates to high duty strike plates to prevent unauthorized entry. These plates can be fitted with up to six screws of three inches instead of the standard two screws of three-fourths of an inch. The longer screws make it more difficult for anyone to break the frame and reach inside to turn the piece that turns the thumb of a single cylinder deadbolt.