What Is a Door Slab?

A door slab is the actual door panel without the complete frame assembly. Depending on the product, a slab door may need to be prepared for hinges, a handle, and other hardware before installation.

Slab doors are commonly used when the existing door frame, or jamb, is still in good condition and the homeowner wants to replace the door panel without replacing the entire frame.

For example, if an older interior door is damaged or outdated but the existing opening and frame are straight, square, and in good condition, replacing the slab can be a practical renovation option.

RenoPro Co. offers a variety of interior doors in modern, shaker, solid-core, hollow-core, and glass styles for renovation projects throughout Toronto and the GTA.

What Is a Pre-Hung Interior Door?

A pre-hung interior door is supplied as a complete door unit. The door slab is already mounted inside its frame, with the hinges installed and the door prepared for installation.

Depending on the specific model, a pre-hung door package can include the door slab, jambs, door stop, hinges, and a pre-drilled handle bore.

This makes pre-hung doors particularly useful when the existing frame is damaged, when a homeowner is changing the entire opening, or when several doors are being installed as part of a larger renovation.

You can explore RenoPro Co.'s selection of pre-hung interior doors for homes, condos, renovations, contractors, and builders throughout the GTA.

Slab Door vs. Pre-Hung Door: What's the Difference?

The easiest way to understand the difference is to think about how much of the doorway you are replacing.

When Should You Choose a Slab Door?

A slab door can be the right choice when your existing door frame is in good condition and you mainly want to update the appearance of the door.

Choose a slab door when:

• Your existing jamb is straight and in good condition.
• The existing opening does not need major modifications.
• You want to replace only the door panel.
• You are comfortable having the door prepared for the existing hardware configuration.
• You are matching an existing door opening during a renovation.

This can be particularly useful for homeowners who want to update several outdated doors while keeping portions of the existing installation.

When Should You Choose a Pre-Hung Door?

A pre-hung door is generally the better option when you are replacing the entire door unit or installing a door into a new or renovated opening.

Choose a pre-hung interior door when:

• The existing frame is damaged or no longer square.
• You are renovating the entire doorway.
• You are changing the size or configuration of the opening.
• You want a complete door-and-frame package.
• You are installing multiple new doors during a renovation.
• You want the convenience of a factory-assembled door unit.

For many whole-home renovations in Toronto, Vaughan, Richmond Hill, Markham, Mississauga, and other GTA communities, replacing the complete door unit can create a more consistent finished result.

Can You Replace Just the Door Slab?

Yes. In many situations, homeowners can replace only the door slab while keeping the existing frame. However, the existing frame and hardware configuration need to be suitable for the replacement door.

Before ordering a slab, check the existing door's width, height, thickness, hinge locations, handle location, and swing direction. Small differences can create installation problems if the new slab does not match the existing setup.

If you are unsure whether your existing frame can be reused, replacing the complete unit with a pre-hung interior door may be the simpler solution.

For more information about measurements and openings, see our guide to measuring a rough opening for a pre-hung door .

What Should You Measure Before Ordering a Slab Door?

Measuring a slab door is different from measuring a rough opening for a new pre-hung unit. If you are replacing only the slab, accurate measurements are especially important.

Measure the following:

1. Door width: Measure the existing door from edge to edge.
2. Door height: Measure the full height of the existing slab.
3. Door thickness: Confirm the thickness of the existing door.
4. Hinge locations: Check the number and position of the hinges.
5. Handle location: Check the location of the existing handle bore.
6. Door swing: Confirm whether the door is left-hand or right-hand.

Never assume that two doors that appear to be the same size will automatically have identical hinge and hardware locations.

If you are replacing the complete unit instead, you will generally need to measure the rough opening. Accurate measurements are important when ordering pre-hung doors in the GTA.

You can also read our complete guide to standard interior door sizes in Canada .

Slab Doors for Modern Interior Renovations

Slab doors are not limited to traditional designs. Modern homeowners can choose from clean shaker profiles, flat designs, solid-core construction, hollow-core construction, and glass styles.

A simple modern slab can create a completely different look when paired with new trim, baseboards, contemporary hardware, and updated flooring.

For homeowners looking for a modern renovation style, RenoPro Co.'s interior door collection includes several contemporary options.

What About Frosted Glass Interior Doors?

Frosted glass interior doors are another option for homeowners who want to introduce visual interest and light into a room while maintaining more privacy than a clear glass door.

They can work especially well for home offices, bedrooms, dens, hallways, flex spaces, and other areas where homeowners want a modern glass appearance without creating a completely transparent doorway.

If you're searching for frosted glass doors in Vaughan or modern glass interior doors throughout the GTA, RenoPro Co. offers several styles.

Explore the RenoPro Co. frosted glass interior door collection to see available designs and sizes.

Frosted glass can be particularly effective in modern homes because it combines the clean appearance of a glass door with a greater sense of separation between rooms.

Slab, Pre-Hung or Frosted Glass: Which Is Right for Your Project?

The best choice depends on the condition of your existing doorway and the look you want to achieve.

Slab vs. Pre-Hung Doors for Toronto Homeowners

Toronto homes can have a wide variety of existing door openings, from older houses with established frames to newer construction and fully renovated interiors. That means there is no single door type that is right for every project.

If the existing frame is in excellent condition, a slab door can provide a straightforward way to update the appearance of a room. If the frame needs to be replaced, a pre-hung unit is often the more practical choice.

For larger renovations, homeowners and contractors throughout the GTA often choose multiple matching pre-hung interior doors to create a consistent appearance throughout the home.

RenoPro Co. supplies modern interior doors in Toronto, pre-hung doors in the GTA, solid-core doors, hollow-core doors, shaker doors, and glass interior doors for residential renovation projects.

How to Avoid Common Door Ordering Mistakes

One of the biggest mistakes homeowners make is ordering a door based only on its visible width and height. The existing frame, thickness, swing, hinge positions, and opening condition can all affect whether a replacement will work.

Before ordering, confirm:

• Door width and height
• Door thickness
• Left-hand or right-hand swing
• Existing jamb condition
• Hinge configuration
• Handle location
• Whether you need a slab or complete pre-hung unit
• Whether the door is solid core, hollow core, or glass

When in doubt, measure the existing door and opening carefully before placing your order. For a complete replacement, professional installation or verification can also help prevent costly mistakes.

For additional information about door replacement costs and options, read our 2026 interior door replacement cost guide .

Why Choose RenoPro Co. for Interior Doors in Toronto & the GTA?

Choosing the right door is about more than selecting a style. You also need the correct size, construction, configuration, and installation method for your project.

RenoPro Co. offers a growing selection of modern interior doors for homeowners, contractors, builders, and renovation professionals throughout Toronto and the Greater Toronto Area.

• Modern shaker interior doors
• Solid-core interior doors
• Hollow-core interior doors
• Pre-hung interior doors
• Frosted glass interior doors
• Clear glass interior doors
• Fire-rated interior doors
• Multiple widths and height options

Browse the complete RenoPro Co. interior door collection or explore our pre-hung interior doors if you're replacing the complete door unit.

Frequently Asked Questions About Door Slabs

Is a slab door the same as an interior door?

A slab door is an interior door panel supplied without the complete pre-hung frame assembly. The term "slab" describes how the door is supplied rather than a specific design or material.

Is a slab door cheaper than a pre-hung door?

The door itself can cost less because the frame and other components are not included. However, the total project cost depends on preparation, hardware, installation, and whether the existing frame can be reused.

Can a slab door be installed in an existing frame?

Yes, provided the existing frame and opening are suitable and the replacement slab can be properly prepared to match the existing hinges, hardware, size, thickness, and swing.

Are pre-hung doors better for renovations?

Pre-hung doors can be an excellent choice when the complete doorway is being replaced or when the existing frame is damaged or unsuitable for reuse.

Are frosted glass doors good for privacy?

Frosted glass provides more visual privacy than clear glass while still allowing light to pass through. This makes frosted glass interior doors a popular option for offices, bedrooms, dens, and modern living spaces.

Where can I buy interior doors in Toronto and the GTA?

RenoPro Co. supplies a selection of modern interior doors, including slab doors, pre-hung doors, solid-core doors, hollow-core doors, shaker doors, and frosted glass doors throughout Toronto, Vaughan, Richmond Hill, Markham, Mississauga, Brampton, and the GTA.

Final Thoughts: Slab Door or Pre-Hung Door?

The decision between a slab door and a pre-hung door ultimately comes down to your existing doorway and the scope of your renovation.

If your existing frame is in good condition and you only need to replace the door panel, a slab interior door may be the right solution. If you're replacing the complete doorway, repairing a damaged frame, or renovating several rooms, a pre-hung interior door can make more sense.

And if your goal is to bring a modern design element into your home while maintaining privacy, a frosted glass interior door can provide an attractive alternative.

Whatever your project, choosing the correct measurements and door configuration before ordering can save time, reduce installation problems, and help you achieve a cleaner finished result.

Looking for interior doors in Toronto or pre-hung doors in the GTA? Browse RenoPro Co.'s collection of modern interior doors and find the style and configuration that fits your renovation.

Shop Interior Doors →

Helpful Home Renovation Resource

If you're planning a larger renovation, the Canada Mortgage and Housing Corporation (CMHC) provides homeowners with information and resources related to housing and home improvement.