How to Replace an Interior Door? Step-by-Step DIY & Expert Tips from Zonle Doors
To replace an interior door, remove the old door, measure the frame, install new hinges, and hang the replacement door securely. It's a simple project that can take less than an hour with the right tools. Below is a full step-by-step guide with expert tips and common mistakes to avoid.
Replacing an interior door is one of the most effective ways to refresh your home's look, improve privacy, or fix damage without remodeling. Whether you're upgrading to a modern WPC door or replacing a standard wooden panel, following proper measurements and hinge alignment ensures a smooth fit and professional result.
Step-by-Step Guide: How to Replace an Interior Door
Step 1: Gather Tools and Materials
Before you start, prepare everything you’ll need:
| Tools | Materials |
|---|---|
| Screwdriver or drill | Replacement door |
| Tape measure | Hinges |
| Level | Screws |
| Chisel | Doorknob and latch set |
| Utility knife | Shims (if needed) |
Pro Tip: Choose a pre-hung interior door if your old frame is damaged or misaligned—it saves time and ensures a perfect fit.
Step 2: Remove the Old Door
-
Open the old door halfway.
-
Unscrew the hinge pins with a screwdriver or hammer and remove the door.
-
Detach the hinges from the frame if you plan to replace them.
Quick Check: Label hinge locations to match with the new door—this reduces adjustment time later.
Step 3: Measure the Door Opening
Use a tape measure to get accurate dimensions:
-
Width: Measure across the top, middle, and bottom.
-
Height: Measure from the floor to the top of the frame.
-
Thickness: Most interior doors are 1⅜ inches (35mm) thick.
If replacing a bathroom or bedroom door, confirm the swing direction (left-hand or right-hand) before ordering the new one.
Step 4: Prepare the New Door
-
Lay the new door on a flat surface.
-
Mark the hinge locations based on your previous measurements.
-
Use a chisel to create hinge recesses (mortises) about ⅛ inch deep.
-
Drill holes for the doorknob and latch if not pre-cut.
Related: Types of Interior Doors – Materials, Styles & Installation Tips
Step 5: Install the Hinges
-
Screw the hinges onto the door first.
-
Align and attach the other hinge sides to the frame.
-
Insert hinge pins and test swing the door—ensure it opens smoothly without rubbing the frame.
Tip for WPC Doors: Pre-drill pilot holes to prevent cracking and maintain screw stability.
Step 6: Adjust the Fit
If the door doesn't close properly:
-
Check for uneven gaps and adjust hinge screws slightly.
-
Use shims under the hinge side to correct alignment.
-
Plane or sand the edge gently if it’s too tight.
Step 7: Attach the Latch and Handle
-
Insert the latch into the pre-drilled hole.
-
Secure it with screws.
-
Install the handle or knob according to the manufacturer’s guide.
-
Test the locking mechanism.
For modern homes, consider upgrading to a soft-close or magnetic latch for smoother operation.
Choosing the Right Replacement Door
Not all interior doors are the same. Choose a material based on function and aesthetics:
| Material | Features | Best For |
|---|---|---|
| WPC (Wood-Plastic Composite) | Waterproof, durable, low-maintenance | Bathrooms, kitchens |
| Solid Wood | Natural grain, excellent sound insulation | Bedrooms, offices |
| Hollow-Core | Lightweight, affordable | Apartments, closets |
| MDF / Laminated | Smooth finish, paintable | Modern interiors |
Related Resource: WPC vs. Wooden Doors – Which Is Better for Interiors?
Common Mistakes to Avoid
-
Not measuring door thickness correctly.
-
Forgetting to check the swing direction.
-
Using mismatched hinges or screws.
-
Painting before test fitting.
These simple oversights can lead to misalignment and require rework.
Maintenance Tips After Replacement
-
Lubricate hinges every 6 months.
-
Check alignment annually, especially in humid environments.
-
Clean door surfaces with mild detergent—avoid harsh chemicals.
-
For WPC and laminate doors, use a soft damp cloth.
FAQs About Replacing an Interior Door
Q1: How long does it take to replace an interior door?
Usually 30–60 minutes if the frame is intact. A pre-hung door installation may take longer.
Q2: Can I reuse old hinges?
Yes, but only if they’re rust-free and structurally sound.
Q3: What is the average cost?
DIY replacement costs around $100–$300, depending on door material and hardware.
Q4: Should I paint before or after installation?
Paint after test-fitting to avoid touch-up work from adjustments.
Conclusion
Replacing an interior door is a manageable DIY project that instantly enhances your home’s aesthetics and functionality. By measuring accurately, aligning hinges correctly, and choosing the right material—like durable WPC or wooden doors from Zonle Doors—you can achieve a professional result that lasts for years.
Explore More: Zonle Interior Doors Collection