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Choosing Interior Doors

Practically every apartment renovation involves the replacement of doors. Not only the entrance doors but also the interior structures undergo changes. Once individuals consider purchasing them, the question arises: which interior doors are optimal?

The market offers countless options, featuring a diverse array of materials, colors, distinctive aesthetics, and designs. Among these, a notable trend in recent years is the installation of concealed doors.

Key Parameters: Size, Material, Construction

Not everyone wants to delve deep into the topic when choosing interior doors. If you’re planning to buy a product that will last 3-5 years until the next renovation, you can focus on basic parameters (size, material, construction) and design (color, style, decor).

The features of the construction and the “filling” of the interior door are usually studied by those who are furnishing an apartment or house for the long term, choosing the very best.

How to determine the right size for an interior door

It doesn’t matter whether you want to buy an exclusive door at a high price or an affordable product; it’s important that the model fits your door opening. To determine the size of interior doors, you can refer to special catalogs with tables of size correspondence. Our catalogs often specify the characteristics of door openings for specific products.

You will need to find out the following parameters of the door:

  • Height of the structure from floor level;
  • Width at the maximum points of the opening;
  • The greatest thickness of the wall where the door will be installed;
  • Width of the door frame;
  • Levels of floor alignment between rooms in the house, in case there is a height difference between them.

You can get a general idea of the measurement features from the image below. The accuracy of the data is crucial because changing the door opening is more difficult than finding a suitable product for an existing one.

More details on this topic are covered in two of our articles: door opening sizes and how to determine the size of an interior door.

Choosing the Best Material for Interior Doors

There’s a common belief that most interior doors are made of wood, but that’s not entirely true. While wood remains one of the most popular options, the range of materials is much broader. In stores, you can find models made from the following materials:

  1. Solid wood;
  2. Particleboard (PB) and Medium Density Fiberboard (MDF);
  3. Medium Density Fiberboard (MDF);
  4. Glass with various types of decor;
  5. Metal-plastic and PVC doors.

Let’s take a closer look at the most popular materials, examining their pros and cons. Understanding the general characteristics of the raw materials used to create these products will help determine which material is best for choosing interior doors.

Solid Wood

Doors made of solid wood are considered premium and are more expensive than others. They are valued for their ecological friendliness, solidity, safety, and beauty, making them a popular choice for luxury cottages and homes. The most sought-after wood species include oak, beech, hornbeam, white ash, and, more commonly, pine.

Advantages of solid wood doors:

  • Excellent aesthetic appeal.
  • Strength, reliability, and durability.
  • Good sound insulation and thermal insulation properties.

The main drawback is the high cost of such models. Additionally, wood has a significant weight, requiring proper preparation of the door opening.

MDF (Medium Density Fiberboard)

Interior doors made of MDF typically match or even surpass the strength of wooden constructions, while the frame remains relatively lightweight. The MDF itself is composed of compressed natural wood chips, and no formaldehyde-releasing resins are used in the bonding process. This makes these constructions safe for children’s rooms.

Advantages of MDF interior doors:

  • High strength and impact resistance.
  • Lightweight and affordable.
  • Diverse design options.


Glass doors are unique products that stand out for their high aesthetic appeal. If, for you, the question of how to choose an interior door for an apartment is primarily associated with the design of the product, it’s worth paying attention to this category of doors. They look perfect in photos, allow light to pass through, and often outshine most other models.

Advantages of glass doors include:

  1. High strength. A significant amount of time has passed since the first glass was made, and today it is manufactured to be absolutely reliable and safe.
  2. Absolute eco-friendliness.
  3. Lightweight structure (compared to solid wood).

The drawbacks of such models include their high cost, low thermal insulation properties, and the complexity of maintenance. To maintain the door’s good appearance, the owner needs to regularly clean and wipe it with special products.

Plastic (PVC doors) and metal-plastic

Plastic doors are highly practical and affordable, making them extremely popular among property owners for country houses or cottages. They are nearly resistant to staining, securely lock, and are not afraid of water, making them long-lasting even when installed in humid areas such as bathrooms or kitchens. Despite their minimal cost, these products often have a distinctly unappealing appearance. Additionally, cheaper models tend to develop issues, as their hardware can quickly break.

Metal-plastic doors typically have a slightly better appearance and a longer service life due to the presence of a reinforcing frame. They are less susceptible to warping, which can cause PVC doors to stop closing properly. However, quality metal-plastic products are hard to consider inexpensive.

The purchase price is often comparable to decent glass or MDF models, in which case opting for another material might be a better choice.

It looks more aesthetically pleasing and does not compromise on durability and reliability.

Construction (opening method) of interior doors

There are several types of doors classified by their construction or opening method. They are often discussed in advice on how to choose interior doors wisely, as it is an important consideration. We cannot overlook this aspect either, and the image below presents one of the classifications.

Our experts identify the following popular door options based on the opening method:

  1. Swinging doors
    These are affordable constructions that enjoy great popularity due to their classic design. Almost all companies manufacturing interior structures produce swinging doors. These doors can open inwards or outwards and be installed with the hinge on the right or left side.
  2. Sliding or sliding doors (coupe doors)
    These are slightly more expensive due to the need for guides (rails). The drawback is that the door fits less snugly into the opening, reducing sound insulation and heat retention. Over time, the rail may warp, making it difficult to use the door.
  3. Folding doors
    Also known as accordion doors, these doors have poor heat retention and good sound transmission but are very compact. They are a suitable choice for a small apartment.
  4. Pivot or swinging doors
    The most expensive design option, as it requires careful adjustment of the mechanism. These doors are more of a stylish accessory: although they look better, their maintenance is more expensive in terms of both money and time. Additionally, doors on such a mechanism should be lightweight, limiting the choice of materials.

When choosing a construction, consider first and foremost the purpose of the door. If it is meant to loosely divide spaces, opt for folding and sliding models. If the goal is maximum isolation, swinging doors are the preferred choice.

Important to know! If you need good sound insulation, don’t reinvent the wheel. Install a classic swinging door that fits snugly into the door frame and is equipped with a seal. It effectively muffles external noises.


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