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How to Install a Doorknob/Handle & Lock

Person putting a new doorknock and lock on interior door

Whether you're looking to upgrade your home’s security, or you're tired of looking at an outdated doorknob, you can install a new set of hardware for a quick way to upgrade a functional piece of your home.

The good news is that installing a doorknob and lock doesn’t require a degree in engineering. In fact, modern doorknobs and locks are designed to be quickly and easily installed into place, without much hassle.

Once you have shopped for your new set, it’s time to get to work installing the hardware. Check out the following quick tips for how to install a standard doorknob and lock.

Tools and Materials Needed

A tape measure, screws, and screwdriver on a wood table

The first thing to do when you start any do-it-yourself job is to gather the tools and materials. For the installation of a doorknob and lock, you’ll only need a couple of common items.

  • Screwdriver: Choose the right screwdriver based on the types of screws in place on your existing doorknob. Usually, a Phillips-head screwdriver will do the trick.
  • Tape measure: You will need to measure the existing space for the new set you purchase, and a tape measure will allow for accuracy.

Once you’ve gathered these tools, follow the next steps to install the entire kit.

Common Mistakes When Installing a New Doorknob & Lock

Installing a doorknob and lock is usually a simple process, but challenges and mistakes do arise at times. Here are some common mistakes:

  • Using the Wrong Tools or Screws: Using the wrong screws can result in a weak installation, so opt for longer screws for added strength.
  • Not Checking Door Alignment Before Installation: Ensure the door is aligned before installing, misalignment can cause the latch to stick.
  • Installing the Latch Backward: The latch must be positioned correctly, with the sloped edge facing the strike plate.
  • Forgetting to Test the Lock Before Final Tightening: Before fully tightening screws, test the knob and lock to make sure it works correctly.

How to Fix a Sticking or Misaligned Door Lock

A misaligned lock can be fixed with a few simple adjustments. Lubricate the lock with dry graphite to remove debris buildup. If the latch doesn’t catch properly, loosen the strike plate and adjust its position. Tighten any loose screws on the lock, knob, or hinges, as misalignment can occur when screws loosen over time. 

If the door is swollen from humidity, sanding the edges slightly can help it close properly. A worn-out latch may also be the issue, so inspect and replace it if necessary. If turning the key is difficult, try using a spare—worn-down keys can cause locking issues. If all keys struggle, replacing the lock cylinder may be the best solution.

Installing a new doorknob and lock set is the perfect way to upgrade the aesthetics and security of your home. With a few quick steps, you can tackle this DIY project.

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