How to mount an additional element on the door. Installing a door trim

Not everyone imagines what extensions installed on interior doors are. Meanwhile, these elements give the door a finished look. Their installation is not difficult and is quite feasible with your own hands, especially after watching the video with detailed explanations and photos.

What are extras

Visually, they look like horizontal and vertical planks with different textures and sizes. Their installation is carried out between the door frame and platbands, both with their own hands and with the involvement of specialists.

Additional slats are not only functional - strengthening door frame, but also aesthetic - they mask defects on the slopes. As a material for their manufacture are used:

  • board - most often coniferous;
  • Fiberboard, MDF, chipboard, laminated or veneered.

An industrial board is a frame made of wood with thin sheets of MDF fixed on it, which have honeycombs inside, which makes them light, due to this, installation is simplified. The finish of the extensions matches the color of the door frame and the door itself.

What are the types of extensions for interior doors

On sale there are strips of the most different sizes- from 7 to 40 cm. All extensions are divided into 2 main types. They are:


Tip: if you need to mount extensions on a previously installed interior door, add attached elements that are close to the box and are slipped under it - lining.

How to properly install extensions on the door between rooms

Doborny boards are installed with their own hands, not only when installing a new door, but also on existing doors. The easiest way to fix the extensions is when installing a new design that is installed together with the door frame. They must be placed in the form of the letter "P". The installation procedure is as follows:

  • Stable stools of the same height are put in a row and placed on them. doorjamb with the inside facing up.
  • They check whether all the angles are equal to 90 degrees, for which they measure the diagonals - their sizes must match.
  • A groove for dobors is selected with a cutter, if it is absent. Its depth and width must correspond to the thickness of the additional plank.

  • A frame is mounted along the contour of the box under the door, but not solid, but in separate strips of plasterboard or plywood. It is enough to put 2 segments at the top, and 3 segments on the sides. They recommend fixing plywood with nails, and drywall with self-tapping screws.

  • carve out top element according to the size of the upper groove, and the side parts of the extension along the length of the side parts of the door frame.
  • Lubricate the edges of the groove with mounting glue or liquid nails.
  • Insert extensions, give time for the glue to harden.

  • The temporary frame is dismantled, then the door frame is installed.
  • The box is leveled: the width dimensions are adjusted using spacers, checking the verticality of the side parts with a plumb line. The horizontality of the top is achieved through the installation of wedges under the side parts of the box.

  • Cracks are sealed with foam, a layer of plaster is applied flush with the wall.

  • They carry out the installation of platbands and skirting boards - the installation of the door with extensions is done by hand.

Attention! If a quarter is not selected on the box in order to mount an extension into it, then you will have to put it directly on the outline of the box. At the same time, the additional strip should be fixed with glue applied in portions every 100-150 mm. When the foam dries and expands, the empty spaces will be filled.

Installation of standard simple extensions on self-tapping screws

Do-it-yourself installation is carried out in several steps:


No matter how complex operations you have to perform when installing extensions, the result is worth it. Having done everything yourself, you will be convinced of this.

How to install an extension on the door: video

Addition to the interior door: photo

When installing door frames, quite often one has to deal with the problem of finishing the uncovered part of the slope. Especially for these purposes, the so-called additional elements that go on sale complete with the door product you purchase are intended. But the installation of these elements, which involves careful adjustment to the size of the open part of the slope, is impossible without understanding how to attach the extension to the box while maintaining a given mounting density.

Types of door frames

Known samples of door frames that require the use of extensions for their installation are divided into two types:

  • products equipped with a groove for mounting the dobor;
  • door frames that do not have such a groove.

In the first case, the elements of the extension are fixed in the groove of the box with one of their ends, while the other of them remains free. The second option for installing the extension involves fixing it on the door slope without rigidly fixing one of the sides.

Additional elements are usually made in the form of laminated MDF strips, having the appropriate color (preferably matching the color of the platbands and the door frame). Sometimes (in order to preserve the color pattern of the interior), elements of a different, more suitable color are used as extensions. A large selection of additional elements, differing not only in color, but also in width, allows them to be used when finishing slopes of any size. The main thing is that the width of the blanks you have chosen would allow you to fill the uncovered part of the slope with a minimum of waste.

Mounting elements with a groove

Consider the procedure for attaching extensions to door frames with a groove on them. The sequence of operations performed in this case may look like this:

  1. First of all, it is necessary to install in place and properly fix the door frame (you can also hang the door itself, which will not interfere with the placement of extensions).
  2. After that, you should adjust the extensions in length by trimming them to the required size.
  3. Then it is necessary to measure the amount of indentation from the wall slope to the edge of the door frame (preferably in several places). With a large spread of measurements, the extensions will have to be cut in accordance with the contour of the slope. After that, a special edge tape is glued to their end part, to which the casing should subsequently be attached.
  4. Following this, it is necessary to fix the extensions in the grooves of the box; and first a horizontal element is inserted, and only then the side (vertical) ones are installed. Pay attention to the fact that they are located strictly at 90 degrees to the plane of the box.
  5. During installation, it is advisable to stick masking tape at 5-7 points on each additional element along its entire length, which will ensure its more reliable fixation in the mounting grooves.
  6. Finally, you can fill in the gaps between the extension and the wall with mounting foam.
  7. After the foam has hardened, it is necessary to cut off all its excess and proceed to the fastening of the platbands.

Installation of extensions without a groove

In this case, immediately after fixing the door in the opening, it will be necessary to carefully measure the unclosed part of the wall (up to the slope). After trying on the elements of the addition in place, they must be cut (it is best to do this along their long side), after which it will be possible to stick pieces of edge tape on both end parts.

With non-plastered slopes, the fastening of the extensions is carried out using a small bar, which is attached to the slopes so that one of the sides of the extension can be fixed on it. The beam must be set strictly according to the level, which ensures the correct orientation in space of the installed elements. The order of fastening the top dobor is as follows:

  1. First of all, the dobor element is attached to the bar.
  2. The resulting gap between the wall and the extension is filled mounting foam.
  3. After the foam dries, its excess is removed with a regular knife, after which the casing is fixed.

In the event that the slopes have a flat and plastered surface, they usually do without an additional bar.

Why use them

We see that the technique of using extensions allows us to abandon the rather tedious procedure for plastering slopes. In addition, with a well-chosen and securely installed extension, the slope takes on a look that can decorate the interior of any modern room.

Before attaching extensions to the door, be sure to ask how you can make them yourself, using MDF panels or laminate blanks for this purpose. Similar decision will significantly simplify the task of closing the so-called "divergent" slopes (located in relation to the box at an angle other than 90 degrees).

Video

All tips for attaching extensions are located below:

Many people, when renovating their homes, install new door(entrance or interior) or ennoble old design. When purchasing a door, do not forget about the nuances decorative design doorways, slopes.

The space where the door and the frame is installed cannot always be covered by the frame. The thickness of the doorway is wider. Therefore, manufacturers offer complete to any model of solid wood, MDF, veneer extensions from the same material as the canvas. Installation of door extensions can be carried out both during the installation of doors, and after some time.


Dobory, platbands give a finished look to the doorway

Consider several options correct installation dobor. We will give recommendations to those who wish to do their installation by hand.

The extension is a decorative element that allows you to close the wall of the opening, not affected by the box. Not all openings are the same. Their thickness depends on the material used. If the wall is brick, then its thickness can be either one or more bricks.


The width of the opening is different, often the installation of extensions is required to create a unity of space

And to create a unity of space is required in any case for the completeness of the interior. Dobors perfectly cope with this function.

  • Additional elements are represented by a board or a panel of certain sizes made of various materials. The range includes a ruler from 80 mm to 500 mm. The thickness of each panel is 10–15 mm.
  • Install door extensions can be in the groove of the box or right next to it.

When choosing a door, take care to buy extensions at the same time so that you don’t try to find a suitable shade in the future. The elements will be in contact with each other and the slightest difference in tone will become noticeable to any person. Therefore, when measuring or an interior opening, specify the dimensions of the horizontal and vertical surfaces.


Dobors, platbands, box, canvas must be of the same shade

Extras are not always for sale right size. Buy the option that is closest to what you need. Big things can always be reduced. The missing size will create difficulties with installation.

Various door mounting options

Openings can differ not only in the thickness of the wall, but also in the proportions of the space itself. Slopes are not always perfectly smooth and have a strictly vertical or horizontal direction.

There are oblique slopes (with extension to the outer part of the wall), with uneven surface when the walls are poorly plastered. It is necessary to take into account all the nuances so that the installation of decorative elements is correct.

Standard door fittings

It is understood that there is a special groove in the door frame where the extension is inserted.


Often the extension is installed in the factory groove of the box

Installation is carried out together with the box at the stage of its fixing in the opening. We will need the following elements:

  • vertical extension - 2 pcs.;
  • horizontal extension - 1 pc.;
  • building corner or tape measure;
  • rule;
  • a hammer;
  • hacksaw or circular saw;
  • drill;
  • mounting gun;
  • foam;
  • nails without caps or glue "liquid nails";
  • self-tapping screws;
  • furniture plugs;
  • masking tape;
  • wedges, bars.

This is a standard set for any way of installing decorative extensions. We proceed to the description of the standard method.

Sequencing:

This completes all steps. Using this guide, installing door extensions with your own hands will become available to anyone. home master without extra costs.

Non-standard method of installing extensions

Not always an input box or interior door has a special groove for the spike of the decorative slope.


In the absence of a groove, the extension is installed close to the box different options

It refers to metal structures or the option of using a box not supplied with the door. Then the groove may not be provided. But extensions need to be installed. There is another method for installing panels:

  • butt joint finishing board to the box, if the door is installed before decorative strips are purchased;
  • if the door is not installed, then the panels are fixed directly to the frame at the assembly stage.

Let's consider both options.

If the door has not yet been installed

  • Having collected the vertical and horizontal parts of the box, we fix the extensions to the ends of the racks, having previously taken measurements and filed them to the desired size.
  • With a thin drill, we drill holes for small nails at a distance of 200-300 mm from each other.
  • Carefully nail the panel to the slats of the box.
  • We install the structure in the doorway, performing all the steps in sequence.

If the door is installed

You can install dobors with your own hands in such a situation in two ways:

  • fastening with long screws to the racks of the box;
  • fixing to the wall.

In the first case, it is necessary to select thin self-tapping screws of such a length as to flash through the width of the extension and timber. This method is possible if the thickness of the non-ennobled wall is not more than 200 mm. With a larger size, the strength of the structure may be in doubt.

  1. We twist the screws into the previously prepared holes, driving them inside the panel. We perform actions around the perimeter of the doorway.
  2. In the second case decorative board fixed to the wall to be covered. If the wall is flat, no large gap between the wall and the door frame, you can fix the extension directly to the wall using self-tapping screws or liquid nails.
  3. When using self-tapping screws, we drill small holes with a recess for the cap.
  4. We twist the screws around the perimeter, close it with furniture plugs using silicone glue.
  5. When choosing the option with glue, we apply liquid nails to the inner surface of the extension. Attach to the wall and press firmly. For good adhesion of surfaces, you can fix the panels to the wall and the box with masking tape.
  6. If the walls are uneven or the gap is very large, you can use lining bars to secure the extensions to the wall.
  7. We cut the bars required thickness for parts of the correct size.
  8. We fix them to the wall, controlling the process with a level. We form a frame for decorative panels.
  9. We install extensions on the resulting frame using self-tapping screws or liquid nails.
  10. We take a mounting gun and blow out the space between the wall and decorative element without fanaticism, so as not to disturb the proportions.
  11. After the foam dries, we remove the excess with a knife, proceed to the installation of platbands.

The unity of space has been created. Any kind of do-it-yourself door installation is available to those who know how to hold tools and solve simple problems.

Doorway with deviations

Not always the interior opening has smooth vertical or horizontal lines.

Basically, door extensions are installed with inside where there are no loops. There are situations that require decorative coating from the hinge side. It is necessary to observe the gaps that allow the door to open smoothly. If you do not take into account the opening angle of the fittings, there will be friction between the surfaces, which will lead to rapid abrasion of the decor.

You can close the wall with others finishing materials: wallpaper, painting, Wall panels, decorative plaster. The world of construction stores will offer you a variety of goods. Door addition reduces the time of finishing the premises, the cost of purchasing additional funds, prevents difficulties with choosing a shade.


The door is a single composition of the interior. Everything must be perfect.

The price of extensions and their installation depends on several parameters.

During the installation of interior doors, it may be necessary to aesthetically design the installation site. This problem becomes especially relevant in the case when the thickness of the walls of the opening is greater than the width of the door frame, as a result of which the end sections of the walls remain uncovered.

Of course, the solution to this problem can be implemented in several ways, among which we should highlight the manufacture of door slopes (from plasterboard, plastic, plaster mortar) or the use of specialized fittings, or simply extensions. Well, in view of the fact that in previous information materials we have already introduced the reader to the method of constructing slopes, today we would like to focus users' attention on how to attach extensions to an interior door.

Choice of extensions

Currently, manufacturers of specialized door fittings offer the consumer a wide range of door fittings, differing in type of material, design and price. Whereas it is very important for the contractor to select products that fully meet the existing requirements in all of the above areas.

Dobor design

Depending on the operating conditions and individual factors of the room, extensions made of various materials can be used to decorate the end sections of the opening. Wood, plywood, chipboard and even plastic can be used in this direction. However, the most popular option today are door extensions made of MDF. And this circumstance is connected with the fact that such constructions have the correct geometric shapes and are available in a wide range overall dimensions(width up to 250mm).

Special attention You should also pay attention to the constructive addition. Indeed, depending on the hardware manufacturer, these elements can be equipped with a mounting spike or groove, or they can be produced without additional devices (in this case, the groove should be in the body of the box). In view of what, it is advisable to purchase extensions together with a box and a door leaf.

In addition, the color scheme of the MDF extensions completely coincides with the color shades of the door frames, which allows you to visually recreate a single design (the colors of the box and the extensions will not differ).

Advantages and disadvantages of MDF extensions

If we talk about the advantages of finishing doorways with the help of extensions, the following can be distinguished:

  • Irreproachable appearance the opening is achieved by creating a single design box + dobor + cashier;
  • The speed of finishing work;
  • The ability to do the work with your own hands (due to the exclusion of "wet operations");
  • Long service life of extensions.

If we talk about the limitations of this finishing method, then it should be noted that MDF extensions have a low mechanical strength, and instability to moisture. In addition, due to technical features material, there is a possibility of cracking the extensions when they are fixed (for example, with nails). In view of this, it is necessary to pre-drill the mounting holes.

door mounting technology

It should immediately be noted that all installation operations should be carried out only after installing the interior door. Moreover, taking into account the specifics of the design, the door frame should be mounted in such a way that its end side opposite the plane with the mounting groove is flush with the wall in the area of ​​the doorway.

The very same algorithm for the installation of extensions provides for the execution of construction operations in the following sequence:

First of all, the installation sites of the extensions (the end of the box, the opening) must be cleaned of mounting foam, debris and all elements that may interfere with the installation of door fittings. Particular attention should be paid to the mounting groove, which should also be cleaned of foreign materials.

Further, according to the existing dimensions of the doorway, a horizontal extension should be cut so that it can easily sink into the mounting groove of the box. After that, having fixed the horizontal extension (you can use masking tape for fixing) in the installation position (according to the level), you can cut off the side extensions to a given size. To do this, it is enough to measure the distance from the floor to the horizontal extension.

After that, it will be necessary to cut off the extensions longitudinally so that their end faces are flush with the wall. For what, at first all extensions are fixed in the mounting position. And then, from the wrong side, an even thin rail is applied to each of them (you can use the rule), which is in contact with the wall. And at the point of contact of the rail with the dobor, markings are applied.

However, before cutting off the extension, the resulting line should be mirrored to the opposite edge of the extension. This is done in order to ensure that the cutting line is located inside the mounting groove, and the factory end can be visually open area flush with the wall. Cutting off the extension is best done using electric jigsaw, using a nail file with small teeth.

At the next stage, it is desirable to provide a mechanical connection of the extension elements with the base box. For these purposes, recesses with a diameter of 0.7 - 1 mm are drilled at the ends of the extensions (from the side of the cut), which are located in increments of 20 - 30 cm from each other. And then, nails (with a diameter of 1-1.5 mm) are installed in these holes, with pre-cut off hats. That is, it turns out a design that can be nailed to the box.

In the future, the extensions should be installed in the mounting positions so that there is no excessive gap between them and the body of the box. Moreover, in order for the carnations to enter the body of the box, it is quite enough to slam the extensions manually around the entire perimeter.

At the next stage, using a building level and a square, it is necessary to achieve such a condition that the extensions are located perpendicular to the mounting base of the box. And for the convenience of further work, it is recommended to wedge the extensions in the installation position using wedges.

At the final stage, it is necessary to foam the voids that form between the base opening and the wrong side of the extension. For which it is recommended to perform operations in the following sequence:

  1. Using a sprayer, slightly moisten the place where the foam is laid (We recommend that you find out which foam to choose);
  2. Using a mounting gun, it is necessary to lay the mounting foam in the technological gap (along the perimeter) between the extension and the opening at the point where the extension enters the groove of the box;
  3. You should wait for the preliminary hardening of the mounting foam;
  4. It is necessary to make the final fixation of the elements, laying foam rollers between the extension and the opening in increments of 100 - 120 mm (in order to prevent deformation of the finish when the material solidifies).
  5. After the foam has completely solidified, all the excess should be cut off and fixed to the end part of the mounted additional cashing elements (using specialized nails).

Alternative methods of fixing extensions

Sometimes fixing dobors is performed alternative ways, which include mechanical fixation (using liquid nails or ordinary carnations). However, the implementation of this kind of work is associated with certain difficulties. Indeed, in addition to the need to build an additional retaining frame, it will be necessary to pre-drill the extensions (in order to prevent their cracking) in case of mounting on nails.

You can see the installation options for extensions in the following video:

If you liked the material, I will be grateful if you recommend it to friends or leave a useful comment.


Many do not know how to attach the extension to the box. Therefore, they turn to specialists in the repair. You can do this work yourself. You just need to read some of the tips below.

The extension is used to equalize the width of the door frame and the door niche. This material serves to cover the "bare" space of the slope. It is made from MDF in a wide variety of colors and textures. Ideally, if it is fully combined with the color of the platbands and the door itself. This is how you can achieve exquisite combination elements in the interior.

Why are these details used at all? The thickness of the walls in many apartments (especially modern ones) is somewhat greater than the thickness of the door frame. Previously, this problem was solved with the help of plaster and putty, which was then pasted over with wallpaper. Dobor looks more aesthetically pleasing and will cost you less.

The main benefits of extensions

They look very neat, beautiful and presentable. The integrity of the door block is not violated. The door does not get wet and does not deteriorate, because the fixing does not require putty and water. A door with such an element will last much longer, and the slopes look more elegant and spectacular. The dobor is attached quickly enough, which will save you time and money.

You can buy this material in any specialized hypermarket. If it is problematic to find it, the addition can be made with my own hands. For these purposes, MDF or laminate is ideal. It is just as easy to close the slope with home-made extensions as with purchased ones.

Features of the choice of extensions

In the process of purchasing a block, immediately consider the width of the opening in the wall. If it turns out to be larger than the door frame, you will have to give preference to a block with a special groove. If the width matches, you can get by with a classic block without grooves.

Thanks to the groove, the extension is very close to the box. And this saves you from having to make adjustments. The interior will look thoughtful and harmonious if you choose extensions of the same texture and in the same color design as the door you are buying. It is important that its thickness corresponds to the thickness of the slopes, but not narrower than them. If needed in the future, you can always adjust the size of this part.

Note! The top and side goodies are always located at right angles to each other. The top extension is always somewhat wider than the door.

Before buying this material, be sure to measure the thickness of the wall. Do this operation at four different points. Maximum value will be decisive when buying a supplement. It can be cut if in some place it is much wider than the wall. After trimming, there will definitely be ends that will need to be pasted over with edging tape.

Dobor is the element that is easy to fix at any stage of installation, as well as at its end. Often it is attached to the side where it is located. door lock. In this case, the door will open as much as possible without touching the extension. If the opening angle does not matter, you can install this element differently.

Groove installation

How is the dobor mounted in a door frame with a groove?

  • To begin with, the installation of the door block in the opening is carried out (it is possible with a door, it is possible without it).
  • Take four measurements different height opening from the edge of the door block to the edge of the wall.
  • The results obtained may not match. Adjust the thickness and length with a miter saw. Form cuts with edging tape.
  • At this stage, the extensions are mounted directly into the groove. The top is installed first, then the side ones. They are always installed at right angles.
  • The building level needs to check the correct position of the extensions horizontally and vertically.
  • Secure with painter's tape to keep it from moving.
  • If voids have formed, they must be filled with mounting foam. After it dries, cut off the protruding foam with a knife.
  • Platband installation.

Grooveless installation

  • The first stage is the same as the one we described in the previous method.
  • Measure slopes.
  • A miter saw will help you adjust the dimensions of the extension, if necessary. Make cuts with edging tape.
  • If the slopes are not plastered, the extensions must be fixed to a solid wooden plank. It is pre-mounted to the slopes. In the case of plastered slopes, such a bar is not required.
  • If during installation there are "bare" areas, they should be filled with mounting foam. After it dries, cut off the protruding parts with a knife.
  • Installation of platbands.

Installation "in a quarter"

There are two main ways to install this:

  • to eliminate voids between the door niche and the wall, the extensions are wedged;
  • the groove is formed from one large and several small wooden bars screwed to the door block. Below we will consider the installation according to the second method.
  • Installed first door block(can be with or without a door). The groove is formed using an electric mill (if it is not in the door frame).
  • Continue forming the groove by screwing small wooden blocks to the block.
  • Make four measurements at different distances from the door niche to the edge of the wall.
  • If necessary, reduce the length or width of the board with a miter saw. The remaining cuts are removed with an edge tape.
  • Mounting the dobor with a snug fit in the groove. First, the upper and then the lower extensions are installed at a right angle.
  • Verify correct location building level horizontally and vertically.
  • Secure the board in place with masking tape.
  • Fill the resulting voids with mounting foam, after it dries, cut off the protruding parts.
  • Installation of platbands.

Sometimes situations arise when the wall is too thick. Manufacturers have foreseen such a problem and provided several constructive solutions. So, for example, additional boards can be connected to each other with special adapters or with the help of slotted joints. If the add-ons you purchased look like regular board, their connection can be made as follows.

Join two boards, tightly applying one to the other. It is required in advance to saw off a part of one of them according to the required width. Using self-tapping screws, you need to attach one long or several short strips to the back. Planks can be made of plywood or fiberboard. The hole must be drilled according to the diameter of the screw head. In the same way, you can attach the extension to the box. Holes for self-tapping screws will need to be made in the box. But this method requires certain skills and abilities. Therefore, we cannot recommend it to beginners in this business.

Sometimes visible holes may remain at the ends. Platbands will help to make them invisible.


Platband installation

Most architraves are joined at an angle of 45 degrees. If you do not have special skills, you should not independently carry out the sawdust of this building material. Moreover, to obtain the ideal result, sawdust must be done with professional equipment.

Soft wood architraves can be gently nailed finishing nails. In platbands made of hard rocks, you need to carefully drill holes in advance. Dip a few nails deep and use a wax corrector or sealant. It will help to visually eliminate the hole left after nailing...