When it comes to home improvement projects that deliver big visual impact with relatively low effort, few things beat updating or replacing your interior doors. Learning how to install an interior door can enhance your home’s functionality, aesthetics, and even energy efficiency.

Whether you’re going for a sleek modern interior door style or classic six panel interior doors, this guide will walk you through the installation process while also exploring the best design choices for your home.

Why Replacing Interior Doors Matters

Your interior doors do more than separate rooms. They contribute to the design flow, offer privacy, and help with sound insulation. Older or damaged doors can make your home look dated or worn, while new wood interior doors or double interior doors can instantly modernize your interior.

With the wide variety of interior door styles available—from wooden doors interior to minimalist flush designs—you can easily match your renovation goals or aesthetic preferences.

Tools and Materials You Will Need

Before we jump into the step-by-step process, gather the following tools:

  • Tape measure
  • Level
  • Hammer or nail gun
  • Screwdriver or drill
  • Shims
  • Wood screws
  • Utility knife
  • Pry bar (for old door removal)
  • Caulk (optional for finishing)

For doors, you’ll either use a prehung interior door (which includes the frame) or a slab door (just the door panel).

Step-by-Step: How to Install an Interior Door

Step 1: Remove the Old Door (if needed)

Start by removing your old door and frame (if applicable). Use a screwdriver to take the door off its hinges. Then, use a pry bar to carefully remove the trim and door frame if you’re replacing a prehung door.

Step 2: Prepare the Opening

Check that the rough opening is square using a level. Measure the width and height of the opening to ensure your new prehung interior door will fit. The opening should be about 2 inches wider and taller than the door.

Step 3: Dry Fit the New Door

Place the new prehung door in the rough opening. Make sure it opens in the correct direction and fits properly. Use shims to help position the door squarely in the opening.

Step 4: Secure the Frame

Once the door is square and plumb, drive screws through the frame and into the studs on each side. Check that the door opens and closes smoothly.

Step 5: Install Trim and Finishing Touches

Replace or install new trim around the door frame. Use caulk to fill in any gaps for a clean finish. Paint or stain the door as desired, especially if you’re working with a wood interior door or wooden doors interior.

Optional Step: Installing a Slab Door

If you’re using just a slab (not prehung), you’ll need to measure and chisel out hinge mortises on both the door and frame. You’ll also need to drill holes for the handle and latch.

 

wooden doors interior

 

Best Interior Door Styles for Modern Homes

Whether you’re going for functionality, aesthetics, or both, there are plenty of interior door style options that suit modern needs:

  • Six Panel Interior Doors: A classic choice that fits both traditional and transitional interiors.
  • Double Interior Doors: Great for connecting two large rooms or creating dramatic entrances.
  • Flush or Solid-Core Doors: Sleek and minimalist, perfect for contemporary interiors.
  • Glass Panel Doors: Allow natural light to flow between rooms while still offering separation.

Interior Door Materials: What to Consider

  • Wood Interior Doors: Timeless, durable, and available in multiple finishes.
  • Hollow-Core Doors: Lightweight and affordable, ideal for less trafficked areas.
  • Solid-Core or MDF: Offer better sound insulation and feel more substantial.

Pro Tips for a Smooth Installation

  • Always measure twice before cutting or drilling.
  • Use long screws (3 inches) to secure the frame into wall studs.
  • Check for level and plumb at each stage.
  • Don’t over-tighten screws; it may warp the frame.

When to Hire a Pro

If you’re unsure about measurements or working with uneven floors or walls, it might be worth hiring a professional. Installing double interior doors can be tricky and requires precise alignment.

Looking for the best range of styles and materials? Explore our interior door products to find the perfect fit for your home.

Also, check out our blog on choosing the right exterior door if you’re planning a full door makeover inside and out.

Final Thoughts

Learning how to install an interior door is a valuable skill that can elevate your home’s aesthetics, function, and value. Whether you’re refreshing a single room or giving your whole home a facelift, the right interior door style plays a big role in the final look.

From wood interior doors to double interior doors, and from six panel interior doors to sleek modern designs, your options are endless.

Upgrade your space today with new interior doors that reflect your personal style and practical needs.