How to Replace and Install Interior Doors – A Step-by-Step Guide with Batavia Tools

Whether you're renovating your home or just updating a single room, replacing interior doors is one of the quickest ways to upgrade the look and functionality of your space. But what may seem like a daunting task is actually a manageable DIY project—especially when you have the right tools and a clear plan. In this guide, we’ll walk you through how to replace and install interior doors, including pre-hung doors, frame adjustments, and finishing touches—with the help of precision tools from Batavia.

When should you replace an interior door?

You may need to replace an interior door if:

The door is warped, cracked, or damaged
The hinges are loose or misaligned
You're updating your home's style
You want to add glass or replace an existing window
You're switching from one door type to another (e.g., standard to rebated)

What you’ll need

Before getting started, make sure you have the right tools:

Batavia multi-function saw – For trimming doors or cutting hinge recesses
Cordless drill/driver – For screwing hinges and handles
Measuring tape & level – For accurate alignment
Chisel and hammer – For fitting latches and hinges (if needed)
Sander or sanding block – For finishing edges

Step 1: Measure the existing door and frame

Always measure:

Height and width of the existing door
Thickness of the door
Hinge and handle positions

If you're replacing a rebated or pre-hung door, double-check frame dimensions and reveal depth.

Step 2: Remove the old door

Unscrew the hinges
Remove the door from the frame
If replacing the frame too, carefully remove trim and the frame using a pry bar and multitool

Step 3: Install or replace the door frame (if needed)

If the frame is damaged or you're updating the look:

Use treated timber or a door frame kit
Ensure the frame is level, square, and plumb
Secure with appropriate screws and check all edges with a spirit level
Install the doorstop if not pre-installed

Batavia’s cordless drill makes this process faster and cleaner—especially in tight hallway spaces.

Step 4: Fit the new door

Mark hinge locations using your previous measurements
Use a chisel or multi-function saw to recess the hinge areas
Attach the hinges and test the door in the frame
Adjust if needed for smooth swinging and proper gaps (approx. 2–3mm)
If the door doesn’t fit perfectly, trim the edges using Batavia’s multi-function saw with a guide for straight, splinter-free cuts

Step 5: Install handle, latch, and strike plate

Mark and drill for the door handle and latch
Chisel the latch and strike plate recesses
Secure all hardware with a screwdriver or drill
If your new door has a glass panel, double-check that it's properly sealed and secure

Step 6: Final checks and adjustments

Test the door for smooth operation
Sand any tight spots
Apply paint, varnish, or sealant as needed
Reattach any casing or trim around the door frame

Special situations

Replacing a door with a window: Consider load-bearing implications and insulation
Adding a door to a new wall opening: Ensure the wall is reinforced for a frame
Switching door types (e.g., standard to rebated): Measure carefully and adjust frame width

Why use Batavia tools?

Batavia offers precision, power, and versatility for door installation tasks:

✅ Multi-function saws for cutting doors and recesses
✅ Cordless drills for hinge and handle mounting
✅ Measurement tools for perfect alignment
✅ Ergonomic design for less fatigue during long projects

Upgrading your interior doors is easier than you think. With Batavia tools and this step-by-step guide, you can replace or install doors like a pro—whether you're working on a single bedroom or an entire home renovation.