What Is A Hollow Core Door? Facts and Considerations

When considering door options for your home, you may come across hollow core doors. These doors are constructed differently from their solid wood and solid core counterparts, and understanding their unique features can help you make an informed decision for your space.

A hollow core door is made of fiberboard or laminated wood with a honeycomb cardboard interior. This design creates a lightweight structure, which can be less susceptible to expansion and contraction compared to solid wood doors.

While they may not offer the same level of durability and sound insulation as solid core doors, their affordability and ease of installation make them an attractive option for various applications.

Inside of a hollow core door

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What Is a Hollow Core Door?

A hollow core door is a type of interior door that is made of fiberboard or laminated wood, with a honeycomb cardboard interior. This lightweight design makes them an economical and easy-to-install option for your home.

Although these doors lack the sound-dampening and durability of solid core or solid wood doors, they remain a popular choice for many homeowners due to their affordability and ease of installation.

When you inspect a hollow core door, you will notice that the edges are typically made of medium-density fiberboard (MDF) or softwood, such as pine. These materials provide additional support and help maintain the door’s structure.

Inside the door, the cardboard honeycomb spacers are strategically placed at key points to ensure stability and maintain the door’s overall shape.

Construction of Hollow Core Doors

Materials Used

Hollow core doors are constructed using various materials that give them their unique properties. You will find doors made of:

  • Fiberboard: A type of composite material used for the outer layers of the door.
  • Veneer: Thin layers of wood used to provide a visually appealing surface.
  • MDF: A dense and strong engineered wood product used for door edges.
  • Honeycomb cardboard interior: Lightweight material used to fill the door’s interior in a honeycomb pattern.

Design and Structure

The design of a hollow core door is notably different from that of a solid wood door. It includes:

  • Outer layers: The outer layers are usually made of veneer or fiberboard, giving the appearance of a solid wood door.
  • Edges: The edges are constructed from MDF or a softwood, such as pine. This provides the door with some strength and stability.
  • Interior: Instead of being solid throughout, the interior of the door is mostly hollow. A honeycomb cardboard structure is placed inside to save weight and reduce costs.

This honeycomb pattern in the interior has several benefits:

  1. Reduces the overall weight of the door, making it easier to handle and install.
  2. Provides insulation to help maintain the temperature inside your room.
  3. Offers a cost-effective alternative to solid core doors without compromising on quality.

Keep in mind that while hollow core doors are a popular choice for interior use due to their affordability and ease of installation, they may not be as suitable for exterior applications. They are generally less durable and provide less security than solid core or solid wood doors.

Comparison to Other Door Types

When choosing a door for your home, it’s essential to compare the different types available. Hollow core doors differ from solid wood doors and solid-core doors in various aspects, such as construction, cost, durability, and insulation properties.

Hollow Core Doors

Hollow Core Doors allow for a lightweight and cost-effective option, as they are made from a thin layer of wood or fiberboard surrounding an empty core.

These doors are primarily used for interior applications, such as bedrooms, bathrooms, and closets. While they offer the advantage of economy and ease of installation, hollow core doors lack durability and provide poor soundproofing.

Solid Wood Doors

Solid Wood Doors have long been the premium choice for homes. They are constructed entirely of solid wood, offering exceptional durability, visual appeal, and insulation.

However, solid wood doors also tend to be significantly more expensive than other door alternatives. Additionally, they can be susceptible to fluctuations in temperature and moisture, leading to warping or swelling over time.

Solid Core Doors

Solid Core Doors serve as an affordable alternative to solid wood doors. They are made with a solid core, typically medium-density fiberboard (MDF) or particleboard, encased in a layer of wood or fiberboard veneer.

Solid core doors share many similarities with solid wood doors, such as a similar look and a degree of durability. They are also paint-ready and better at resisting temperature and moisture fluctuations than solid wood doors.

One key difference between solid core and hollow core doors is the insulation they offer. Solid core doors have a denser core and contain more sound-dampening material, resulting in better soundproofing compared to hollow core doors.

This feature makes solid core doors a suitable choice for areas where noise reduction is important, like bedrooms and offices.

Sanding a door

How Do You Know If A Door Is Hollow Core?

There are a few ways to tell if a door is hollow core:

  1. Weight: Hollow core doors are much lighter than solid core doors. If you lift the door and it feels very light, it’s likely hollow.
  2. Sound: Tap the door with your knuckles. If it sounds hollow or has a hollow echo, it’s probably hollow.
  3. Look at the edges: If the edges of the door are visibly thin, it’s likely hollow.
  4. Check the manufacturer’s label: The manufacturer’s label on the door may indicate whether it’s a hollow core or solid core door.

Advantages of Hollow Core Doors


Hollow core doors are a more affordable option for your interior spaces compared to solid wood or solid core doors. They typically range from $50 to $150 per door, making them an economical choice for bedrooms, bathrooms, and closets.

You can save on the overall cost of your home renovation or construction project by choosing hollow core doors for your interior.


One of the main benefits of hollow core doors is their lightweight construction. The hollow core design makes these doors lighter than solid wood or solid core doors, which can be advantageous when it comes to installation and transportation.

A lighter door is easier to handle and can be installed by just one or two people, reducing labor costs and time spent on installation. Plus, the lightweight design puts less strain on hinges and frames, which can extend the lifespan of those components.


Hollow core doors are quite versatile as they can be used in various rooms of your home, such as bedrooms, bathrooms, and closets. Moreover, they come in a range of styles, colors, and finishes to match your interior decor needs.

Disadvantages of Hollow Core Doors

Are Hollow Core Doors Bad?

Hollow core doors are not inherently bad, but they do come with some disadvantages when compared to solid core or wood doors. It’s essential to be aware of these drawbacks to make an informed decision for your specific needs.

Durability Issues

Hollow core doors are made from thin veneers of wood or fiberglass over a cardboard honeycomb interior, which makes them less durable than their solid wood or solid core counterparts.

They can be more susceptible to damage, such as dents, cracks, punctures, or warping due to fluctuations in temperature and humidity. If you require a door to withstand daily wear and tear, a solid wood or solid core option may be a better choice.

If you ever need to adjust a hollow core door, it is possible to trim a hollow core door, but it’s not as easy as a solid wood door. If you are planning on doing this, you must use the correct blade to trim a hollow door.

Lack of Soundproofing and Insulation

Compared to solid wood and solid core doors, hollow core doors offer less soundproofing and insulation. The lightweight and hollow construction of these doors makes them less effective in blocking noise transfer from one room to another.

If maintaining a quiet environment is crucial for you, opt for a heavier solid wood or solid core door that can provide better soundproofing.

In terms of insulation, hollow core doors can contribute to increased energy costs as they allow heat or cold air to pass through more easily. If energy efficiency is a priority, you may want to consider investing in a solid core or wood door with greater insulating properties.

Read our article to find out if you can fill a hollow core door which some people think improves soundproofing and insulation.

Security Concerns

Hollow core doors are generally used for interior applications, such as bedrooms, bathrooms, closets, and some laundry or utility rooms, where security isn’t a significant concern.

However, due to their lightweight and less sturdy construction, hollow core doors can be more vulnerable to forced entry. It’s essential to use solid wood or solid core doors for exterior entry points to protect your home and belongings more effectively.

Additional Considerations

When considering hollow core doors for your home or office, it’s important to take into account several factors that may influence your decision, such as resale value, sound transmission, privacy, and weather resistance.

Resale Value

In terms of resale value, hollow core doors may not significantly boost your property’s worth. Although they are more affordable and easier to install, they lack the durability and sturdiness of solid core doors.

If you are thinking about your property’s future market appeal, keep in mind that prospective buyers might not view hollow core doors as highly as solid alternatives.

Sound Transmission

Sound transmission is another aspect to consider, as hollow core doors provide less effective soundproofing compared to solid doors. The hollow interior does not absorb sound as efficiently, which may result in increased sound transfer between rooms. This could be a concern if you require a quiet and private environment, particularly in office spaces or bedrooms.


On the subject of privacy, hollow core doors might not be the best option if you need a strong barrier between rooms. Their lighter construction offers less resistance to impact and intrusion, which may not suit all applications. For areas where privacy is a priority, such as bedrooms or offices, a solid core door may be a more suitable choice.

Weather Resistance

Finally, bear in mind that hollow core doors are less weather resistant than their solid counterparts. They are typically used for interior applications and are not designed to withstand harsh outdoor conditions.

If you require doors for exterior use or for rooms exposed to moisture, like bathrooms or laundry rooms, consider other options that offer better resistance to the elements.

What Are Hollow Core Doors: A Recap

A hollow core door is a lightweight, cost-effective door option made of fiberboard or laminated wood with a honeycomb cardboard interior.

These doors are not entirely hollow, as the honeycomb structure and MDF or softwood edges provide support and maintain the door’s shape.

When considering hollow core doors, remember that they’re easier to transport and install, and they also exhibit less expansion and contraction compared to solid wood doors. However, they are more prone to damage and challenging to repair.

As you explore your options, keep in mind the pros and cons of hollow core doors. They may be a suitable choice for certain areas of your home, while solid wood or solid-core doors may be more appropriate in situations where durability and insulation are essential.

Also keep in mind that it’s not as easy to trim if you need to alter the door. Find out how much you can cut off a hollow core door here.

By understanding the characteristics and limitations of hollow core doors, you’ll be able to make an informed decision that best suits your needs and preferences.

If you have hollow core doors in your home and want to refresh their look, take a look at our guide on how to paint hollow core interior doors.