DIY Guide: Replacing Interior Doors Without Replacing the Frame
Replacing interior doors is one of the most effective ways to refresh the look of your home without the expense or disruption of a full remodel. The good news: in many cases, you can install a new door using the existing frame, saving both time and money. With the right tools, careful measurements, and quality materials, this DIY project is well within reach for a confident homeowner.
S&L Lumber is the leading building material supplier in Columbus for all your DIY projects. Use this step-by-step guide to help you replace interior doors while keeping the existing frame intact.
When Can You Reuse the Existing Frame?
Before purchasing a new door, confirm that your current frame is suitable for reuse. You can typically keep the frame if:
- The frame is square, level, and structurally sound
- There is no significant rot, warping, or water damage
- The door opening is a standard size
- You are replacing a hinged interior door with another hinged door
If the frame is damaged or out of square, replacing the entire prehung unit may be the better option.
Tools and Materials You’ll Need
The team at S&L Lumber can help you select the correct door style, size, and hardware for your space, while also offering practical guidance on material options, finish selections, and compatibility with your existing frame. Here are a few of the tools and supplies you’ll need to get started:
- Replacement interior door slab
- Tape measure
- Pencil
- Level
- Screwdriver or drill
- Chisel and hammer
- Wood shims
- Utility knife
- Sandpaper
- Hinges (if not reusing existing ones)
- Door knob and latch set
Step 1: Measure the Existing Door
Accurate measurements are critical. Measure the height, width, and thickness of the old door slab, not the frame opening. Also note:
- The hinge size and placement
- The distance from the top of the door to the top hinge
- The backset for the doorknob
Pro tip: Remove the existing door and take it with you when purchasing a replacement to ensure the closest match.
Step 2: Remove the Old Door
Open the door fully and use a screwdriver or drill to remove the hinge pins, supporting the weight of the door as you work to prevent it from shifting or falling. Once the pins are removed, carefully lift the door away from the frame and set it aside on a flat, protected surface. If you plan to reuse the hinges, remove them from the door slab now and label their positions if needed, keeping all screws and hardware organized so reinstallation is quick and accurate.
Step 3: Prep the New Door Slab
Lay the new door flat on sawhorses or a padded work surface and use the old door as a template for layout. Trace hinge locations carefully and mark the handle height to match the existing setup. If hinge mortises are not pre-cut, take your time with this step, as precise cuts will help the door hang correctly:
- Score the outline with a utility knife to prevent splintering
- Chisel carefully to match the depth of the hinge, working in small increments
Test-fit the hinges before moving on to ensure they sit flush with the door edge and allow the door to close properly without binding.
Step 4: Install Hinges and Hang the Door
Attach the hinges securely to the new door slab, then carefully position the door in the frame. Insert the hinge pins and check the swing, making sure the door opens and closes evenly. Use wood shims if needed to fine-tune alignment, ensuring consistent spacing along the top and sides for a clean, professional look.
Open and close the door several times to confirm smooth operation and make any minor adjustments before proceeding.
Step 5: Install the Handle and Latch
Drill or confirm the bore holes for the doorknob and latch, following the manufacturer’s spacing and depth guidelines. Install the hardware according to the manufacturer’s instructions, tightening screws evenly to avoid misalignment. Test the latch to ensure it engages smoothly with the strike plate and that the door closes securely without resistance.
Minor adjustments to the strike plate or latch position may be needed to achieve a perfect fit.
Final Touches
Light sanding along the edges can help fine-tune the fit and eliminate any tight spots. Once everything operates smoothly, paint or stain the door as desired, allow it to fully cure, and reinstall trim if it was removed to complete the project.
Quality Materials Make the Difference
A successful door replacement starts with quality materials and expert guidance. At S&L Lumber, you’ll find a wide selection of interior doors, hardware, and professional advice to help your project go smoothly from start to finish. Whether you’re upgrading a single room or refreshing your entire home, our team is here to help you choose the right products for the job.
Stop by S&L Lumber or contact our team to get started on your next DIY project with confidence.
