Posted By Julia Gajchuck

Doors can be classified into two broad categories: interior and exterior. The most obvious difference would be known from their names. The rest of the changes are dependent on various factors such as the door’s appearance, materials used in the production process, price range and so on and so forth. Any type of building, whether residential or commercial, will need both of these types of doors.

To differentiate between interior and exterior doors, the following are the main comparisons between them:

Thickness Differences: Interior & Exterior Doors

Exterior doors are much thicker than interior doors. The main reason being that exterior doors act as a barricade, they offer protection from various elements. They are able to endure any type of season and are good at keeping the harsh weather from entering. Furthermore, they provide good security as they can’t be broken easily.

Interior doors are quite thin as compared to exterior doors. They do not provide much resistance against the harsh weather conditions and neither they are reliable when it comes to security issues. However, soundproof and heatproof interior doors are available.


Since exterior doors are made of high-quality materials, they tend to be more expensive than interior doors. This is because interior doors are mostly hollow on the inside. Usually, they are made from a single material. For example, fiber wood or steel is the main choices in interior doors. On the other hand, exterior doors are made of top quality materials used on the inside and outside. One can choose from a wide range of wood, glass to steel for an outer layer. The exterior doors are not hollow on the inside and are solid. This makes the cores of these doors robust and acts as insulators, thus the increase in price.

Interior vs. Exterior Door Appearance

Interior doors offer a wide range of numerous styles to choose from. They can be French, pocket, bypass, sliding or folding etc. They give off a delicate and more aesthetic appeal.

Exterior doors give off a bold appearance as they are mainly used as the main door leading to the outside. They are not as decorative as interior doors as their purpose is mostly to provide security and resistance against harsh weather conditions.


Interior doors are well known for taking up less space. For instance, sliding doors are placed on rollers which slide against the hollow spaces of the wall. This allows the room to appear larger as the door space is saved. If the interior door isn’t a sliding type then it can be a folding door which also saves up space.

Exterior doors require an extra amount of space. These doors are mostly the traditional hinged doors. They need a certain area capacity when swung open or shut.


Most interior doors are empty from the inside and therefore they do not have the capability to stop the noise. One has to opt for sound absorption padded carpets and ceilings if they live in a noisy neighborhood.

However exterior doors, due to their solid cores, are excellent in soundproofing. They stop a high percentage of noise from entering the premises. This allows one to enjoy the peace and bliss.


Interior and exterior doors are an important investment for every homeowner. It is imperative to not compromise over quality if even it means paying a bit extra. If you are searching for high-quality, affordable interior and exterior doors for your house, then you can find a wide variety of them at Door Design Lab. If you have any query related to door styles or quality, you can contact our customer support team.