Prehung Interior Doors vs. Prehung Doors: A Complete Guide

When it comes to installing new doors in your home, you have two main options: prehung interior doors and prehung exterior doors. While both types simplify the installation process, they serve different purposes and come with distinct features.

In this comprehensive guide, we’ll explore:

• What prehung doors are

• The differences between prehung interior and exterior doors

• Benefits of choosing prehung doors

• Installation tips

• How to select the right prehung door for your home

What Are Prehung Doors?

A prehung door is a complete door system that comes with:

• The door slab (the actual door)

• A pre-attached frame (jamb)

• Hinges (already installed)

• A door casing (trim) in some cases

Unlike slab doors (which are just the door itself), prehung doors are designed for easier installation since the frame and hinges are already in place.

Types of Prehung Doors

1. Prehung Interior Doors – Used inside the home (bedrooms, bathrooms, closets).

2. Prehung Exterior Doors – Designed for entryways, with added security and weatherproofing.

For this blog, we’ll focus mainly on prehung interior doors, but we’ll also compare them to exterior prehung doors.

Prehung Interior Doors: Features and Benefits

1. Easy Installation

Since the door comes already mounted on its frame with hinges attached, installation is much faster than with slab doors. This is ideal for DIYers or contractors looking to save time.

2. Perfect Alignment

The frame is pre-assembled, ensuring that the door hangs correctly without gaps or misalignment. This reduces the risk of sticking or uneven closing.

3. Variety of Styles

Prehung interior doors come in multiple designs, including:

• Panel doors (raised or flat panels)

• French doors (with glass panels)

• Barn doors (sliding style)

• Pocket doors (sliding into the wall)

4. Material Options

• Solid wood (high-end, durable)

• Hollow-core (lightweight, affordable)

• MDF (smooth finish, budget-friendly)

5. Pre-Finished or Unfinished

Many prehung interior doors come pre-primed or pre-finished, saving you time on painting or staining.

Prehung Exterior Doors: How They Differ

While prehung interior doors focus on aesthetics and functionality inside the home, prehung exterior doors are built for:

1. Security & Durability

• Made from stronger materials (steel, fiberglass, solid wood)

• Often include multi-point locking systems

• Reinforced frames to resist forced entry

2. Weather Resistance

• Weatherstripping to prevent drafts

• Thermal insulation for energy efficiency

• Threshold seals to block moisture

3. Higher Cost

Due to enhanced materials and security features, prehung exterior doors are more expensive than interior ones.

Advantages of Choosing Prehung Doors (Interior & Exterior)

✅ Faster Installation – No need to build a frame from scratch.
✅ Professional Fit – Eliminates alignment issues.
✅ Complete Package – Includes hinges, frame, and sometimes trim.
✅ Wide Selection – Available in various styles and materials.

Disadvantages of Prehung Doors

❌ Heavier & Bulkier – Harder to transport and maneuver.
❌ Higher Cost – More expensive than slab doors.
❌ Limited Customization – Pre-set hinge placements may not suit all openings.

How to Install a Prehung Interior Door

Tools Needed:

• Level

• Shims

• Screwdriver/drill

• Hammer & nails

• Saw (if trimming is needed)

Steps:

1. Remove the Old Door & Frame (if replacing).

2. Dry-Fit the Prehung Door – Check if it fits the rough opening.

3. Insert Shims – To ensure the frame is level and plumb.

4. Secure the Frame – Nail or screw into the wall studs.

5. Check Door Swing – Ensure it opens and closes smoothly.

6. Install Trim/Casing – Cover gaps with molding.

(Note: Exterior prehung doors may require additional sealing and insulation steps.)

How to Choose the Right Prehung Door

For Interior Doors:

• Measure accurately (width, height, thickness).

• Choose the right material (solid for durability, hollow-core for lightweight).

• Match your home’s style (modern, traditional, rustic).

• Consider soundproofing (solid-core doors reduce noise).

For Exterior Doors:

• Prioritize security (steel or fiberglass).

• Check energy efficiency ratings.

• Ensure proper weather sealing.

Conclusion

Prehung doors—whether for interior or exterior use—offer a convenient, time-saving solution for homeowners and contractors. Prehung interior doors provide seamless installation and stylish options for rooms inside the house, while prehung exterior doors deliver security, durability, and weather resistance.

If you’re renovating or building a new home, prehung doors are an excellent choice for hassle-free installation and a professional finish.