Standard sizes of interior doors - what GOST says

Box dimensions

When selecting doors, you can see ready-made kits that, in addition to the door leaf, include a box with fittings. This is an easy-to-install option, which is a U-shaped design.

There are nuances in determining the size of a door frame for an interior or entrance door. After all, the total width of the panel and the box increases by 10-15 cm. And in order to leave the necessary gap for protection against abrasion between the wall and the installation frame, the opening parameters must be larger than the dimensions of the box.

The thickness of the interior box and the wall must match.Otherwise, the box simply will not be able to fix the structure securely and aesthetically.

When assembling the box yourself, the dimensions of the vertical posts are determined in accordance with the dimensions of the thresholds, gaps and vertical strips, as well as the height of the canvas.

Opening sizes

When creating openings in partitions and walls yourself, standard parameters are usually used. And a door is already selected for the finished interior passage according to the principle described above.

Doorways are usually not calculated to the contrary (calculation based on dimensions for an existing door structure). However, such calculations will help ensure that the measurements taken and the choice of door set are correct.

To calculate the opening parameters based on the door size along with the installation kit you need:

1. Determine the width of the interior passage. To do this, add up the width of the door leaf with gaps on both sides, as well as two thicknesses of the frame.
2. Find out the height. To do this, add one frame thickness, one gap (in the upper part) and the distance between the panel and the floor to the height of the canvas. The latter figure varies between 0.5-2 cm.

How to correctly determine the size of the opening for an interior door: video.

Door leaf thickness

The thickness of the interior door leaf can be different, but no more than the wall. The thicker the door, the more massive and expensive it looks. This parameter also affects the durability of the structure.

Its weight depends on the thickness of the canvas. The larger this size, the more requirements are placed on the fittings. Sometimes you have to install additional loops.

The most popular products are 3 to 4 cm thick.However, thinner sliding models made of MDF (2 cm), as well as ultra-thin interior doors made of tempered glass with a thickness of 8 mm or more, are also available on the market.

Table of standard opening sizes

GOST 475-2016 (in the reference appendix) presents standard opening sizes for interior doors. They are shown in the table.

For example, for an opening 91 by 200.7 dm, you will need a door 80 by 200 dm.

Single and double doors

If the opening between the rooms is from 120 to 150 cm wide, the door dimensions and weight of the single-leaf structure will be so impressive that it will be difficult to open it. Therefore, for wide passages it is recommended to use double-leaf or one-and-a-half models.

Double-leaf models are a structure of two panels of identical size. Their width varies between 1-1.4 m.

One-and-a-half options also consist of two doors, but one of them is half the size of the second. There are also models in which the width of one sash is one third of the width of the second. Such options are used for passages less than 120 cm, but too wide for installing a single-leaf structure.

The dimensions of such doors are selected as if the two halves are a single structure. Depending on the model, the parameters may increase by 1.5-2 cm.

Doors with hidden frame

For modern interiors, hidden doors that are flush with the wall are often chosen. There are no platbands. Only the handle reveals the presence of a passage.

To select hidden interior wooden doors, the usual scheme for determining the dimensions of the door leaf with a frame is used. In order for the canvas to be hidden on both sides, it must match the thickness of the wall.However, it is easier to achieve an invisible effect on one side, then matching thickness is not necessary.

Opening to living rooms

Building codes provide recommendations regarding standard door openings and their sizes for different rooms.

For a bedroom, children's room and other living spaces, the optimal passage width is 88-89 cm. The standard height is 207 cm. For such parameters, a door 80 by 200 cm wide is used.

Kitchen opening

The optimal width of the opening for the kitchen is 78-79 cm. The height remains the same - 207 cm. A fabric 70 cm wide and 200 cm high is selected for such a passage.

Openings for bathrooms

According to the standard, the openings for the bathroom are narrower than for the living rooms and kitchen. Standard indicators are 68-69 by 207 cm. The door for such a passage will have parameters of 60 by 200 cm.

For sliding doors without opening frame

Sliding interior models are not suitable for all apartments.

In this case, there are recommended dimensions:

1. For interior sliding panels, the minimum opening width is 80 cm. Optimally 100 cm.
2. The minimum width of the passage between rooms with double-leaf sliding doors is 120 cm. The maximum width in this case is 220 cm. And the sliding panels will also be wider.
3. If the width of the passage is greater than the above values, then use interior sliding structures with a large number of panels. Door options such as “book” or “accordion” are also suitable.

The parameters of the canvas depend on the height and width of the opening, as well as on the design features of the sliding model. The technological gap and space for the box (if provided) must be taken into account.

The sliding canvas can travel along guides along the walls or slide into a cassette. In the first case, the door may be wider than the passage.

Arched openings

In new buildings and private houses you can find non-standard solutions. These may be passages whose parameters go beyond generally accepted standards, or of an unusual shape.

The most common non-standard shape is the arch. Often it is left open (but can also be closed, depending on the chosen design and purpose of the room).

Arched interior paintings are rarely found on the open market. Models of non-standard shape are made to order.

Doors to order

Ready-made models are often not suitable for non-standard layouts. Also, the available product does not always satisfy customer requirements. Therefore, many companies work to order.

To order a model that will fit into the existing opening, it is important to correctly measure the height, width and thickness of the interior door.

Door manufacturing companies often offer to calculate the door leaf parameters for an existing opening. They can offer a service such as a surveyor visiting the home, or use the data provided by the customer.

What you need to take measurements yourself

To find out the required dimensions of an interior door with a frame, you will need a pen and a notepad.

Measurement algorithm:

1. Width. Measure the width of the passage (the distance between the walls) in three places: top, bottom and center. The resulting numbers are recorded. If they differ, then choose the smallest option. If the old door has not yet been dismantled, then measurements are taken only after removing the trim.
2. Height. Measure the height of the passage (from the top wall to the floor) on the left and right sides. The obtained indicators are recorded. If they do not match, then choose the smallest one.
3. Opening depth.To do this, measure the thickness of the wall in several places on the right and left sides, as well as from above. If the parameters do not match, choose the largest value.

An example of calculating the width and height of a doorway

If calculations are made for a pre-purchased door leaf, then use an online calculator or perform all the steps manually.

To find out what opening is needed, you need to know the dimensions of the canvas. The height and width of the passage are calculated separately.

For example, let’s calculate an opening for a door 80 cm wide with a standard door height of 200 cm:

1. Width. To the width of the leaf (800 mm) add twice the thickness of the frame (2x30 mm), the size of the installation gap (10 mm), and twice the size of the door block (2x20 mm). It turns out that the width of the opening is: 800+2x30+10+2X[0=910 mm.
2. Height (h). To h of the canvas (2000 mm) add h of the threshold (20 mm) and double the thickness of the box (2x30 mm). It turns out that h of the opening is equal to: 2000+20+30[2=2080 mm.

What to do if the actual dimensions do not meet the standard

If the size of the door does not correspond to the parameters of the passage and the exchange of purchased products is impossible for some reason, you can use techniques that will help solve this problem.

Namely:

1. If the thickness of the box is less than the thickness of the wall, then the protruding part is covered with an extension.
2. If the thickness of the interior wall exceeds the thickness of the box, then to correct the situation, an even slope is made along the sides and top.

Main stages of sizing

The dimensions of metal, wooden, and MDF doors are determined the same way.

To do this you need:

• measure the width and height of the opening in several places, choosing the smallest indicator;
• measure the thickness of the interior wall, choosing the largest indicator.

Based on the data obtained, an interior door model is selected.To do this, carry out calculations yourself or select the appropriate option from the table.

If you have no experience in carrying out such calculations, it is better to use the services of specialists from a company that produces or sells doors for both installations inside the apartment, on and at the entrance to it. Otherwise, there is a risk of making a mistake and, as a result, getting a completely different model than was originally planned for installation.

Choosing the size of interior doors and the direction of their opening: video.

Did you know about such nuances of measurements? Maybe you had to measure it yourself? Tell us about your experience in the comments. Save the article to bookmarks and share it on social networks so as not to lose relevant information.