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How to Secure a Door Lock

This article is a collaborative effort, crafted and edited by a team of dedicated professionals.

Contributors: Muhammad Baballe Ahmad, Mehmet Cavas, Sudhir Chitnis, and Zhen-ya Liu.

✓ Verified & Tested Information

How to Secure a Door Lock – A door lock is one of the most important pieces of hardware on your door. It is important to know how to secure a door lock so that your home is safe.

Choose the Right Lock

Choosing the right lock for your door is the first step in securing it. For example, you may want a deadbolt lock that has a mechanical key system. These types of locks are more secure than regular key-in-knob locks and provide a strong form of security. You may also want to consider a smart lock that utilizes a keypad, RFID card, or a mobile app to open the door. In this section, we’ll look at the different types of locks and discuss how to choose the right one for your door.

Consider the type of lock

When selecting the right type of lock for your home, there are a number of options to consider. The two most popular door locks are deadbolts and knob/lever locks. Deadbolts add an extra layer of security to your home as they are more difficult to pick than knob/lever locks. However, they do require two-action operation in order to open (locking and unlocking). Knob/lever locks are easier to operate as they only require a single action (turning the lever or knob). Both types come in many different varieties such as single cylinder, double cylinder, classroom, passage, and privacy. It is important to consider the particular style of each home before making a selection.

Single cylinder deadbolts provide an affordable option for added security and are installed by drilling holes into the door. They can be locked from the outside with a key but unlocked from the inside by using a thumbturn which requires no thumb-print or key yet still remains secure on the outside.

Double cylinder deadbolts require a key on both sides in order to unlock from either side, providing an extra layer of security while also allowing occupants with key access both inside and out. These models do not include thumb-turns due their dual entry design, so be sure not to lock yourself out when leaving!

Classroom function deadbolts allow access with several interconnected levers that need all be turned at once in order for it to open – this prevents access by only one individual which may be beneficial if high volumes of people often enter through one door.

Passage knobs/levers provide free entry both within individual rooms and between residences when multiple locations need quick seamless access within one system; however they lack any kind of advanced locking technology or improved security measures so ensure that your security measure remains intact by using additional methods such as cameras or motion detectors when possible.

Finally privacy knobs/levers provide good protection without sacrificing convenience – these units can easily be locked from within but cannot be unlocked externally without specific tools designed for that purpose; this makes them ideal for bathrooms and bedrooms that need privacy protection yet remain accessible when needed within homes or business premises alike.

Check the security rating

When selecting a door lock, it is important to ensure that the security rating meets your needs. The Association of Locksmiths (ALOA) has created a national standard for door locks with ratings from one to five, depending on the type of lock and its design.

A grade-one rating indicates that the lock offers little protection, while a grade-five rating provides maximum security. It is recommended that you select the highest available security rating within your budget requirements in order to protect your home better.

Grade-one locks are often adequate for interior doors or areas not prone to burglary attempts, but they may not be suitable for external doors or other areas vulnerable to theft or intrusion. A grade-two lock offers medium security and is suitable for exterior doors and other areas where additional security measures are desired. Grade-three locks provide high levels of security, offering more resistance against forced entry than grade-two locks and making them ideal for external doors exposed to greater risk of intruder activity. Grade-four locks offer very high levels of protection which makes them suited for government buildings or other locations requiring maximum security measures such as access control systems or restrictive key control policies.

Grade-five locks offer the highest level of protection available on the market today, featuring tight tolerances and anti-drill components that prevent any type of tampering or manipulation. They provide excellent resistance against burglary attempts due to their robust construction and materials used in their manufacture.

Measure the Door

Measuring the door is the first step in making sure your door lock is properly secured. This will help you to determine the size of the lock that you need and the best place to install it. You will want to measure the thickness of the door, the backset, and the gap between the door and the frame. Taking accurate measurements will help to ensure the correct installation of the door lock.

Measure the width of the door

It is important to obtain accurate measurements of the door before you purchase and install a door lock. Measure the width of the door, using a tape measure, from one edge to the other. Then measure its thickness. This number should be measured at three locations on the door – top, middle, and bottom – to account for any variations in its shape and size. Finally, measure the area around the doorknob; this includes any fixtures that extend beyond locking hardware installed in your existing door frame. Take all measurements in inches or centimeters as appropriate for accurate results.

Measure the thickness of the door

Measuring the thickness of a door is an important step when installing a new lock or security system. Thickness of the door is important to ensure proper fitting of components such as strike plates and locksets, and to know if any special considerations need to be made. Before you can begin installing any new hardware for your door, you will need to measure its thickness.

The first step in measuring the thickness of a door is to gather the materials that you will need. You will need a pencil or pen, measuring tape, and in most cases, another person’s assistance. With two people present to hold the measuring tape in place, it will be easier achieve an accurate measurement.

Start by placing the end of your measuring tape up against one side of your door frame at the top edge of the door itself where it meets with the frame. Pull out approximately 8 inches on the measuring tape and continue along this same line until you reach the other side of your frame. Taking note of where 8 inches would mark along one edge, measure again along this distance on both sides in order to have four equal measurements (top left corner, top right corner, bottom left corner and bottom right corner). Once you repeat this step until all four points are marked off keep track of these measurements using either a pen or pencil so that they can easily be referred back if needed later on during installation procedure.

Adding all 4 measurements together should provide you with 4 eight inch lines which should end up equaling 32 inches if everything was done correctly so far; This number divided by 4 helps provide necessary measurement needed for determining thickness which in most cases ends being exactly 8 inches . Knowing exact sizing is key for selecting proper parts related since variations could potentially result in improper installation down line resulting in difficulty opening or closing door/lock properly; it’s also important as always make sure all parts used are compatible with one another based on operating temperature range mentioned on each product label/warranty pamphlet attached after opening packaging supplied when items initially purchased.

Install the Lock

Installing a door lock is a great way to add an extra layer of security to your home. It’s a relatively easy process that can be done in a few hours. If you’re not sure how to go about it, don’t worry -this guide will give you a step-by-step guide on how to install a door lock. Let’s get started.

Determine the location of the lock

Before you can get started with installing a door lock, there are a few things you’ll need to consider. It is important to determine the location of the lock as this will ensure that it is installed correctly and securely.

Start by measuring the thickness of the door and taking into account any additional trim or molding that may need to be accommodated. Then measure the distance from the edge of the door to where you would like the handle or thumb-turn of your lock to be located. The height of most locks will be standardized but make sure that it is suited to fit your measurements in order for your door lock to sit flush with your door surface.

Since different locks have different requirements, you may also need additional tools such as a power drill with various drill bits, chisels, saws, tape measurer and/or wood screws depending on which type of lock you have chosen. Be sure that all tools are in good working order before attempting installation.

Drill the necessary holes

Drilling the necessary holes is an important step when installing a door lock. Depending on the type of door lock being installed, the number and locations of these holes may vary. It is important to choose a drill bit size that matches the diameter of screws recommended by the door lock manufacturer as using bad quality screws can damage both the lock and your door. If you are attaching a handle to your door, two large screw holes will be needed, one in the center for attaching it to the door, and one at each end for attaching handles. To ensure that these holes align properly with each other, it is advisable to mark them ahead on both sides of the door with a pencil or other marking tool. Smaller hole sizes are generally used for mounting locks on doors. These drilled openings should be slightly larger than your chosen installation or latch screws in order to make room for potential adjustments if needed later on. Once all necessary holes have been drilled, you can move on to installing your selected locking device onto your door frame.

Install the lock

Installing a door lock can be a straightforward task, though there are some tips to keep in mind. When installing the lock, first make sure that the height of both screws is even. To do this, measure the distance between them using a ruler or tape measure. Once the height is determined, place the door handle on the door and mark where you need to drill for each screw.

Next, drill pilot holes for each marked location and insert the screws into their respective holes on either side of the door handle assembly. Secure each screw tightly so that it does not become loose over time. With both screws tight, attach any necessary plates or mounting parts before attaching the main body of your door lock to your door frame. For added security, use metal screws rather than plastic ones as they provide greater strength against forced entry attempts.

Once you have assembled your lock kit connect all power wires from the power supply unit (PSU) or battery pack to their designated points within the lock housing. Finally select a code or key combination and test it works correctly before securing all screws with a drop of threadlocker adhesive so no one can tamper with them and compromising your security system in anyway

Test the Lock

Testing the lock is an important part of ensuring that it is secure and cannot be easily compromised. Testing the lock involves making sure that all the pins are in good working order and that they engage properly when the key is inserted. It also requires testing the latch to make sure it is properly engaged and the door can be securely closed. All of these components are critical to a secure door lock.

Test the lock for proper operation

Testing a door lock is one of the easiest ways to make sure the lock and door provide you with the maximum possible security. No matter how secure your lock looks, if it doesn’t operate, it won’t do its job. To test your lock, first open and close it several times to ensure that it works properly. Then, look at the bolt to make sure that when locked, it protrudes far enough into the door jamb to keep an intruder or thief from being able to slide a tool such as a credit card between the jamb and bolt. Finally turn the handle in both directions. It should turn freely in one direction but require pressure in both direction if pulling away from the jamb. Also click here for further tips on testing and maintenance of locks: [LINK].

Test the lock to ensure it is secure

A secure door lock is an essential part of home and business security, and to ensure that your property is secure it is important to test the lock for function and durability. When you test the lock, you should check for ease of operation, smoothness of locking and unlocking, as well as any extra features like remote access or weatherproofing.

To test the operation of a door lock manually, start by unlocking the door from both sides using the supplied keys. Wiggle the handle from side to side while applying steady pressure. You should feel no resistance or vibration and movement should be minimal. Try this multiple times with both sides of the handle before reinserting the key properly in preparation for testing with a key.

Insert the key into the cylinder on both sides and turn it clockwise two clicks. Pull out on each handle in turn to make sure that there is sufficient friction to prevent access when locked – it shouldn’t move more than 5 millimeters against a moderate pull. Then turn each handle quickly anti-clockwise in turn while pushing inwards – this will ensure that fewer burglars will be able to force open your lock with a sufficiently strong application of force against a door jamb. Finally slide one key out smoothly on each side while turning its corresponding handle – if your lock has sliding pins they should remain firmly inside their chambers at all times while you do this.

If all these tests are successful then your door lock is considered secure, but in order to increase security you may want to invest in additional features such as an electronic deadbolt or an extra locking mechanism like a padlock or chain for further protection.


To ensure your door lock remains secure, it’s important to keep up with regular maintenance such as lubrication, tightening screws, and inspecting the lock for any signs of wear and tear. Regular maintenance can help prevent any problems that could arise and can help ensure your lock remains operational and secure. In this section, we will cover the steps necessary for performing maintenance on your door lock.

Inspect the lock regularly

You can save your property a lot of trouble and maintenance costs by regularly inspecting the condition of door locks. When you notice that the metal parts seem to be getting worn or rusty, it’s time to replace them. Considering the fact that entry is through doors and window locks, so regular inspection of these areas for potential security threats should be must-do task. To ensure a secure lock system, inspect the elements regularly for easy access to intruders and tampering.

When inspecting locks, look for any potential signs of corrosion on metal parts or reduced latch tension. Moreover, bolts and hinges may need replacing due to wear or rust over time from exposure outdoors. Besides having well-maintained locks around the home always ensure their positions are not too exposed as they may be prone to theft when visible. Finally, a simple wipe with a damp cloth can help restore luster and cleanliness in traditional keyway systems while keeping sand and dust away which can affect locking features when not maintained properly.

Replace the lock if needed

If the door lock is sticking and not functioning properly, it may need to be replaced. Be sure to assess all components of the door (frame, hinges, weatherstripping) for wear and deterioration before simply replacing the lock. A faulty frame or hinge can cause stress on the lock and will likely require attention as well.

To replace a door lock, start by carefully taking off the old one using a screwdriver or grinding tool. You should also take special care when handling any loose pieces of metal that may have broken off during removal. Once you have removed all parts of the existing lock, check your new lock to ensure that it is compatible with your existing opening and door levers. The new screws should be threaded at least half an inch longer than the original ones. When you are ready to install your new door lock, begin by attaching one side with two screws, then attach the other side in a similar fashion while ensuring that they line up properly with your existing components. Lastly, use an additional screw on each side of the handle for extra security. Securely fasten both knobs with mounting plates so they stay in place and reinstall any strike plates that your old standard might have included for extra security against forced entry. Make sure to test how smoothly your new locks operate and immediately report any problem areas to a qualified professional for repair if necessary.

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