Prehung vs Slab Door - What's the Difference?

Homebuyers will need to consider the prehung vs slab door decision when shopping for new doors. Understandably, these terms may be new for many homeowners. However, the differences are important to understand before investing in brand-new interior doors. The main difference between prehung and slab doors is whether or not they come with a frame. While a prehung door includes a frame, customers will need to build or purchase a separate frame—or use an existing one—if they opt for a slab door.

What Are Prehung Doors?

Prehung doors like the Avon 07 4R Veralinga are standard doors attached to a three-sided door frame with hinges. You could think of a prehung door as a ready-made package as they come ready to install. That said, you may need to purchase additional hardware. This means you can customize your prehung door with the handle or knob of your choice.

Modern interior doors come in many different materials and configurations and shoppers will find a wide range of hardware to give their doors their desired look. Prehung doors can be used as interior or exterior doors. Typically, they're very heavy and must be installed very carefully to get the balance just right.

After a prehung door has been fitted, you may need to paint or stain it. You'll also need to finish the surrounding area with drywall, trim, or paint.

What Is Included with a Prehung Door?

A prehung door will typically include:

• The door itself (the door slab)
• Door frame
• Hinges
• Pre-cut holes for the strike plate and handle

When (and When Not) to Purchase a Prehung Door

The key factor when deciding if a prehung door is for you is if you have an existing door frame. If your frame hasn't been built or you removed an old frame, a prehung door is a convenient and complete option. A prehung door will remove the need to build a frame, cut a hole for the strike plate, or mortise the hinges.

Prehung Doors: The Bottom Line

Don't buy a prehung door if you want to keep your existing, prepared door frame. However, a prehung door can be a convenient option if you're starting your project from scratch or want to replace the door frame as well as the door.

Can You Install a Prehung Door without Professional Help?

Yes, you can install a prehung door without professional help, but only if you have the know-how. Installing a prehung door is an exacting process but some people will be able to put up a prehung interior door without problems.

However, it may be wise to hire a professional to install prehung exterior doors because they're very heavy. A professional will also ensure that the door is fitted perfectly and is weather-tight.

Trick of the Trade

When installing a prehung door, don't remove the packaging materials or tension straps until the very last moment when you put the door in place. To prevent the door from opening on you, keep the pre-hanging clips in place during the installation process.

What Are Slab Doors?

A slab door—for example, the Avon 07 2RN Ribeira—is a door in its most basic form: stripped down and without a frame. Opting for a slab door will mean attaching the slab door to your existing door frame or building a new frame.

Slab Door Features

A slab door is the most basic iteration of a door. Opening the packaging of a slab door will reveal the door slab itself with or without a pre-cut hole for the door knob.

A slab door won't feature:

• Any surface coating (you'll have to paint it or stain it yourself)
• Hinges
• Mortises
• A metal strike plate A slab door generally costs less than a prehung door. This may make slab doors especially attractive seeing that the wholesale cost of wood doors rose 49% between January 2020 and January 2024 (and this price rise is inevitably passed on to the consumer). However, it’s important to remember that you'll need to paint the door and purchase the other components separately. So the final cost might end up being similar to that of a prehung door.

When (and When Not) to Purchase a Slab Door

If you're happy with the frame you have, a new slab door is a cost-effective way to modernize your room. This is especially true if you're willing to install it yourself. Be aware that slab door installation requires patience, a steady hand, and a good eye. If in doubt, ask for expert help.

How to Install a Slab Door

Installing slab doors is a fairly straightforward process, but you'll need to set aside some time to ensure perfect results:

1. Measure the Door Frame

Measure the door frame (and existing door if there is one) to ensure you order the correct size.

2. Hinge Placement

Use the old door as a basis to mark where the hinges will go.

3. Score the Hinge Mortises

Score the mortise for each hinge then use a sharp knife to chisel out the mortises.

4. Install the Hinges

Secure your hinges in place with screws.

5. Mark and Chisel Out the Door Knob Hole

Consider using a door lock installation jig to make holes in the door for the knob's latch and lever. This will ensure the door and latch holes align perfectly.

6. Chisel Out the Latch Plate

Score around the outline of the latch plate and use a sharp chisel to slot the latch plate in. Then seal the exposed wood with a coat of paint.

7. Hang Your Door

Screw the latch plate to the door and install the door knob. It's finally time to hang your new door!

Trick of the Trade

Installing a slab door is much easier if your new door matches the existing one in size and configuration. Any variations can make it harder to hang the new door correctly.

Purchasing a new door will ensure a straight, flat surface. Used doors may also require planing, sanding, or straightening. It may be best to go with a brand-new door unless you're experienced with DIY installations.

Prehung vs Slab Doors: It's All in the Frame

When considering a new door, both slab and prehung doors are beautiful and functional options. Deciding between one and the other will ultimately depend on whether you want to keep your existing frame or start from scratch.

In either case, make sure your door meets your requirements, matches your home's aesthetic, and provides the necessary soundproofing and insulation. With so many chic options on the market, you're sure to find the perfect door for your new home or renovation project.