A Simple 7-Step Guide to Installing an Interior Door
Can You Install a Door Yourself?
While it’s always advisable to hire a skilled tradesperson equipped with the proper tools for door installation, it's possible to do it yourself with the right guidance. Keep in mind that doors, especially fire doors, can be heavy and difficult to handle alone—so don't hesitate to ask for help if needed.
Our straightforward 7-step guide will walk you through everything you need to know to install your interior door. Always refer to the manufacturer’s instructions that come with your door to ensure your warranty remains valid.
How Long Does It Take to Install an Interior Door?
If you're replacing an old door, installing a new one could take around 2 hours, depending on your DIY experience and tools.
Step 1: Preparing to Install the Door
To begin, carefully remove the old door by unscrewing the hinges, making sure to support the door's weight as you remove the last screws.
If the new door has glass, keep any protective covering on until the painting or staining is finished.
Step 2: Measuring for the New Door
When measuring the door frame, allow for about 3mm of clearance between the door and the door frame. The clearance at the bottom of the door will vary depending on the type of flooring and any threshold strips. For more detailed information on measuring doors, refer to our measuring guide.
Step 3: Trimming the Door to Fit
Even though doors are manufactured to standard sizes, you might need to trim them slightly, especially in older homes where frames may be uneven. For the best results, it’s recommended to have a professional joiner install your doors. Alternatively, if your door frame is particularly uneven, consider using our custom door service for a perfect fit.
To trim your door, measure the frame precisely and subtract 3mm to account for clearance. Once marked, lay the door on a stable surface for trimming. Using a planer, trim evenly from both sides, taking care not to exceed the manufacturer’s specifications for trimming.
After trimming, hold the door up to the frame to check the fit. Don’t forget to chamfer the edge where the hinges will be fitted to ensure a smooth operation.
Step 4: Attaching the Hinges
It's recommended to use three hinges for stability. You can reuse the existing hinge cutouts on the door frame if they’re the right size. If not, fill them with a small piece of timber and mark new positions for your hinges. Pre-drill holes for the screws and then install the hinges.
Next, mark the latch position on the door, ensuring that the handles line up properly. Avoid fitting the latch near door rails, as this can weaken the joint.
Step 5: Temporarily Hanging the Door
Temporarily hang the door to check the fit and install the handles. Open the door 90 degrees against the frame and secure it temporarily with screws in the top and bottom hinges.
Ensure that all exposed edges are fully finished and that the hardware is installed before finalizing the installation.
Step 6: Installing the Door Handle
With the door temporarily installed, you can now fit the handles and the latch plate. Ensure the latch aligns properly and that the door closes smoothly without sticking.
Step 7: Finishing the Door
Once you’re satisfied with the fit, it’s time to finish the door. Remove all hardware before sanding and applying your chosen paint or stain. Be sure to finish all surfaces, including the top, bottom, edges, and any hardware cutouts, following the manufacturer’s finishing guidelines.
Once dry, reinstall the hardware, and your door will be ready to hang