Very often, when replacing interior doors, a problem arises: the thickness of the wall in which the doorway is located is greater than the width of the door frame. The remaining uncovered sections of the wall look unattractive and spoil the whole impression of the new door. Door extensions will help to cope with this problem and give the doorway the necessary strength and a finished look.
Dobory on the door and their varieties
Dobor or doborny board (bar) is a flat board of rectangular shape. For its manufacture, solid wood and laminated or veneered MDF boards are most often used.
This product does not differ in a variety of types. All additional elements can be divided into two groups:
- ordinary;
- telescopic.
Ordinary additional planks look like an ordinary board, and differ from each other in the material from which they are made, in color and in width. On the market there are extensions with a width of 100, 120, 150 and 200 mm.
Telescopic extensions, according to the principle of their installation, are similar to lining. A plank of this type is equipped with a groove on one side and a ridge on the other. This allows you to veneer doorways of any width. On sale you can find telescopic extensions with a width of 90, 120 and 150 mm.
It is also worth mentioning a decorative corner that combines the functions of an additional board and a casing. This product is used only with a door frame of a special design. Deep grooves are located in its ends, into which trim-platbands are mounted. It is convenient to use additional elements of this kind when the width of the door frame is not enough, up to 50 mm. They are not suitable for wider openings.
How to choose the right accessories?
Today, in almost all retail outlets offering interior doors, door extensions are also presented. Therefore, there should be no problems with the choice of color and texture of these components.
When choosing the size of additional slats, it is necessary to make simple calculations. To do this, you need to know the width of the wall (WST) and the width of the door frame (SHK). Knowing these values, it is easy to calculate the width of the extension (SHD): ShD \u003d WST - ShK.
Attention! To obtain more accurate calculations, the width of the wall should be measured at several points, at least four. In the formula, you need to insert the measurement with the highest indicator.
Also, when choosing extensions, you should pay attention to the design of the door frame. If it has a special groove for installing an additional board, then its thickness should correspond to the thickness of the groove.
Technology for installing extensions on an interior door
Installing door extensions does not require any special skills, so you can do it yourself with your own hands. Install additional boards after the frame of the interior door is mounted in the opening and the mounting foam is completely dry. If there is a special groove in the box for adding, it must be thoroughly cleaned. If it is not there, it is necessary to clear the space behind the box from the foam. The width of the resulting gap should be 1.5-2 cm, depth - 1-2 cm.
Further installation technology may have minor differences depending on the type of extensions.
Installation of conventional extensions
The whole process of installing ordinary additional strips with your own hands can be divided into several successive stages:
- Top board trim. First, the bar is measured and cut to length. Next, adjust the width. To do this, the board must be inserted into the prepared groove with the working side outward and mark the width of the wall at both ends. Connect the resulting points with a straight line and cut along it.
- Adjustment of side boards. It is carried out in a similar way.
- Collection of extras.At this stage, it is necessary to adjust the side additional elements in length so that the upper bar lies flat on them in a horizontal position.
- Fastening trim strips. In order to avoid the formation of cracks and gaps, it is necessary to wedge the additional board between the opening and the box. As wedges, you can use pieces of wood, cardboard folded in several layers or dried polyurethane foam. After examining the junction of the upper bar with the side bars, the space between the extensions and the opening is foamed pointwise. When the foam dries, it fills the remaining cavities.
- Installation of spacers in the opening between additional elements. This action will prevent their displacement during the drying of the mounting foam.
- Installation of platbands.
Installation of telescopic extension bars
The process of installing telescopic elements as a whole repeats the steps of installing conventional extensions. The peculiarity of the installation of this type of extensions is that each subsequent row of planks is installed only when the previous one is securely fixed in the opening.
Tip: it is not recommended to first assemble the shield from several rows of telescopic additional boards and then mount it entirely in the opening. This can lead to deformation of the connection of the planks during the drying of the foam.
Thus, telescopic door extensions can be installed by hand without any problems.
Installation of platbands
This type of additional elements is installed easier than all the others. Combined trim-platbands do not require major fastening. The entire installation process consists in fitting them in length and installing them in a special groove on the door frame.
First, the upper trim-platband is measured, cut off and installed, then the side corners are mounted. The side elements should be cut only from below, since there is a notch in their upper part, which ensures a tight connection of the side parts with the top. For the installation of additional elements on interior doors with your own hands, this variety of them is just perfect.
Door trims
Installing extensions on the front door is not much different from installing these elements on interior doors. Their installation can also be done by hand without the help of professionals.
There are three ways to mount additional elements on a metal door:
- lining (the additional board is tucked under the box);
- attached (the product is applied directly to the box);
- using a mounting bar.
For the front door, additional trims made of MDF or natural treated wood are ideal. These materials are resistant to mechanical stress, high humidity and have sufficient heat and sound insulation.
The stages of installing extensions on the front door can be outlined as follows:
- Taking measurements from the wall to the box and from the top of the opening to the threshold.
- Preparation of planks in accordance with the received dimensions. There should be three parts in total: two vertical and one horizontal.
- Fastening of additional elements. In the event of a gap between the extensions and the wall, it must be filled with mounting foam, fixed and wait for complete drying. If there are no gaps and the extension fits snugly against the wall, it can be attached with glue, galvanized nails or self-tapping screws. The heads of nails and self-tapping screws are masked using special mastic or plugs to match the finishing cloth.
- Installation of platbands.
Installing door dobor will not take much time. After the work is completed, the doorway will acquire a beautiful and complete look.
