Define the standard measurements for internal doors of a home, i.e. the most used and widespread dimensions, is important when you have to install windows and doors. The best known and most commonly used standard size for internal doors, excluding the frame size, is 800mm x 2100mm (80cm wide by 210cm high). However, it is essential to consider that the final dimensions will also include the space of the frame, bringing the total dimensions to approx 880mm x 2140mm. This dimension has been consolidated over time as a sort of convention, representing a balance between functionality and aesthetics, allowing for ample passage and integrating harmoniously with most interior design schemes. For homes with specific accessibility needs or in the case of atypical openings, different measures can be used, always in compliance with local building codes and regulations in force.
What size should internal doors have?
The internal doors of a house represent a crucial element from both a functional and aesthetic point of view. Choosing the appropriate size for interior doors must consider both standards and the optimization of living spaces.
Standard interior door sizes vary based on functionality and location. The most common measurements for interior doors are widths of 60, 70, 80, or 90 cm, while the standard height of an internal door is typically 210 cm.
The 60 cm doors wide, they are generally used for small spaces such as closets or small bathrooms, where a large passage is not necessary. 70 or 80 cm doors are the most popular for standard-sized bedrooms or bathrooms, allowing a good balance between passage space and overall dimensions. 90 cm doors are instead recommended for the main entrances to rooms or in contexts where frequent passage of bulky objects is expected, such as kitchens or living rooms.
As an example, a hypothesis is given below technical data sheet with internal door measurements
| Brings | Length | Height | Usage |
| 60cm | 60cm | 210 | Closet, small bathroom |
| 70 | 70 | 210 | bedroom, medium bathrooms |
| 80 | 80 | 210 | offices |
| 90 | 90 | 210 | kitchen, living room or main entrance |
How much should the frame of a 70 door be?
There size of a door frame it is essential to guarantee correct installation and functionality of the door itself. The frame must be adequately sized to accommodate the door, allow adequate closure and ensure structural stability.
For a door with a nominal width of 70 cm, the frame dimensions must be slightly larger to allow space for the installation and movement of the door. Generally, it is considered aaddition of approximately 5 cm for the total width of the frame, which includes the space for the hinges and any margin for correct closure.
So, for a 70cm wide door, the frame should be approximately 75cm wide. L’frame heighthowever, does not differ much from the standard height of the door, which is 210 cm, and can vary slightly depending on the threshold and the possible presence of upper seals.
How thick is a door frame?
The frame thickness of a door is a technical parameter that varies based on the type of door and the construction specifications of the building. Generally, it must be adapted to that of the wall where the door will be installed, to ensure correct installation and good insulation.
For standard interior doors, the frame thickness can usually vary between 10 and 15 cm, depending on the thickness of the walls and the type of door. For example, a wall with a thickness of 12cm will require a frame that can be fitted adequately within this dimension.
In the case of external doors or doors with specific thermal or acoustic insulation requirements, the thickness of the frame may be greater. In these cases, the frames can have a thickness starting from 15cm and can reach i 25cm or more, depending on insulation needs and wall structure.
How to choose interior doors at home?
The choice of internal doors in a house is a crucial aspect in defining the style and functionality of the rooms. A key element to consider in the selection is certainly the dimension of the doors, which must be proportionate both to the physical dimensions of the spaces and to the distribution of the rooms.
In general, for smaller spaces, such as bathrooms or closets, doors are recommended reduced width (approximately 60-70 cm) to optimize the available space and still guarantee adequate access. For bedrooms or kitchens, where passage may be more frequent or more space is needed for transporting objects, doors wider width (80-90 cm) are more appropriate. It is also essential to consider the standard height of the doors, which is usually 210cm, to ensure correct ergonomics and harmonious aesthetics. Before proceeding with the purchase, it is always recommended to check the exact dimensions of the existing openings or new structures, to avoid incompatibilities during installation.
Furthermore, the choice of size can be influenced by the type of opening desired (hinged, sliding, folding), which must be in line with the style and functional needs of the home.
Renovation and internal doors: when should communication be made?
When you proceed to replacing the interior doors of a housegenerally no communication or administrative authorization is necessary if the works do not modify the distribution of the internal spaces of the home and do not alter the external facade or the structural elements of the building.
However, there are some situations where one may be required communication to the municipal administration or other forms of notification, for example:
- change of intended use: if the works imply a change in the intended use of the premises (transformation of a garage into a dwelling, for example), it may be necessary to obtain a building permit or submit a Certified Report of Initiation of Activity (SCIA):
- modifications of bearing structure: if the replacement of the doors involves changes to the structural elements of the building (such as widening the openings in the load-bearing walls), it is mandatory to submit a communication to the municipality, which may request a SCIA or a building permit, depending on the entity of the intervention
If the property is part of a condominium, it may be necessary to inform the condominium administrator or obtain approval from the condominium assembly, especially if the works affect the common areas or the external aesthetics of the building.
