One of the last points of major overhaul or construction of a house is. They complete the overall interior design of the room. Therefore, the overall impression of the entire repair depends on that. 
Types of interior doors. The choice of ready-made doors is huge. They are made of different materials and have a different design. Usually the question of how to install an interior door is solved quickly and easily. It is only necessary to take into account some of the nuances of editing and to choose the right one.
Interior door: features of choice
When choosing the interior door should be taken into accountbasic requirements for them. Such doors should not protect against uninvited guests, that is, they have increased strength and lock properties. Metal or heavy monolithic specimens are not used for such purposes. The main task of interior doors is to isolate the interior spaces from each other. Since different rooms are in different conditions, then the choice of the door depends on their location. All interior doors must provide sound insulation, have a lightweight design and fit into the interior. 
Interior doors can be as one-piecedesign, and with glass inserts. In addition, specific requirements are put forward to them: the door from the balcony (loggia) should have thermal insulation properties, and the bathroom door - a certain moisture resistance. Some options must be necessarily opaque, and others may have transparent elements. When selecting, consideration must be given to the installation conditions. The main setting parameters include the size of the doorway, the thickness of the interior partition (walls), the direction of opening the door leaf. In addition, it is necessary to determine the hardware: the handles should be comfortable, with a snap-in (locking) mechanism. Back to contents</a>
Interior Door Design
The choice of the door is largely determined by itsconstruction. All types of interior doors are structurally composed of a door frame, a door leaf, accessories and a door (can be part of the box). The door is fastened through the box, which fulfills the task of the frame. The box is made of a wooden beam fastened in a U-shape. The dimensions of the box are chosen strictly according to the dimensions of the doorway. The thickness of the box should match the thickness of the wall. On both sides of the box, decorative platbands are installed. The main element providing functional properties and appearance is the door leaf. It is mainly used three types of door leaf: an array, paneled and shield sheet. The array is made of a solid sheet (wood, plastic, composite) or in the form of tightly aligned beams. The paneled structure consists of a rectangular frame, inside which there are inserts (panels) made of particleboard or MDF. 
The design of the interior door. Above, the frame is covered with a decorative coating (plastic, veneer, etc.) in the form of a sheet. The panel door panel includes a wooden frame of beams, a filler and an outer coating of MDF (MDF) sheets. The filler can be made of solid chipboard plates or in the form of an openwork mesh of cells (honeycombs). The design of the interior door can include a glass element of any size and shape (rectangle, oval). The element itself can be transparent, matte, colored, with a relief or in the form of a stained glass window. The set of mandatory accessories includes hinged elements for fixing the door leaf on the door frame, as well as handles for the convenience of opening the door. Doors can be supplied with locking hardware in the form of latches or locks. Usually a combined latch handle is used. Handles together with their overlays play a significant role in the entire exterior design of the door. In addition, if necessary, other decorating elements in the form of linings, laths, etc. may be used. Back to contents</a>
Step-by-step instruction: preparatory work
The interior door should only be installedafter the completion of repair or construction works before the finish of the walls. Naturally, the wall, where you should install the interior doors yourself, should be plastered and stained, and well dried after these operations. Before installing the interior door, you must complete the preparation of the doorway. First of all, the verticality of the walls is checked. If the deviation from the vertical is more than 1 cm, it is advisable to apply a layer of cement plaster and fix the position. All protuberances are removed with a chisel. Only after this, the final dimensions of the opening are measured and the dimensions of the door frame are specified. The dimensions of the box should be 2-3 cm less than the dimensions of the opening. Back to contents</a>
Preparing the door frame
Installation of the door frame in a section. In order to install the interior door yourself, we must first prepare a door frame. The assembly of the box is made from a standard door beam, chosen according to the width of the wall. First, two vertical struts are cut in length equal to the height of the doorway, minus the thickness of the paddle and the gap (approximately 15 mm), and also the upper horizontal jumper, which is equal to the width of the opening, minus the gaps (3-4 cm). The upper part of the pillars and both ends of the bridge are cut at an angle of 45 degrees. Racks and a bridge must be exactly docked in sections. Perpendicular to the cut at the junction, a through hole (through the post and jumper) with a diameter of the order of 2.5-3 mm is drilled. With a long screw, the parts of the box are fastened in place of the drilled hole. There must be two fasteners in each joint. Between the parts to be joined it is recommended to place a thin seal, for example, cardboard. Back to contents</a>
Preparing for installation
Some conditions are recommended showinghow . First of all, the preparation of the door for installation is carried out in a horizontal position on a flat area. First, on the side end of the door leaf, two rectangular grooves are made to fit the size of the hinge flap (top and bottom). The recesses are located at a distance of about 20 cm from the edge of the door leaf. For this, a milling cutter or chisel is used. The corresponding hinges are screwed into the grooves. 
The scheme of installation of door hinges. On the other side of the canvas, at an altitude of about 1 m, a notch is made at the end and an aperture is drilled in the plane of the blade to be fitted with a snap mechanism. The assembly of the accessories is done. Then the door leaf is installed in the box as it will be located after installing the door. The location of the mating response parts on the door frame stand and the place of the latch release into the opposite rack of the box are marked. The door leaf is removed. On the pillars of the box, recesses are made for the hinges with a margin of 10-15 mm along the length of the hinge for adjustment during installation. A recess is made for installing the latch plate and fixing the tab. Back to contents</a>
Mounting the door frame
independently begins with fixing the box indoorway. First of all, the nails are installed and attached. It is made of a board with a thickness of 20-25 mm long, equal to the width of the doorway. The upper part of the sides of the board is rounded off from both sides. The door box is installed in the doorway and wedged with specially prepared wedges at the top and bottom. At the bottom of the box is a temporary spacer, which does not allow the struts to move. The verticality of the racks and the horizontality of the bridge are checked by level and plumb. In the rack of the box holes are drilled for fixing at a distance of 30 cm from each other. Through these holes holes are made in the concrete using a perforator or an electric drill. The dowels are clogged, and the box is fastened with screws. The gap between the wall of the opening and the box is filled with a mounting foam. The spacer is removed. Back to contents</a>
Suspension of the door leaf
Door mounting tools.To install the interior door yourself is to correctly hang the door leaf so that it opens and closes without effort, but at the same time it does not do it spontaneously. First, the door leaf is pre-installed in the frame, by laying thin plates, the same minimum gap between the door leaf and the frame is ensured. The largest gap can only be at the bottom, at the sill. This final position of the door leaf is fixed. The specified position of the hinges on the frame of the door frame is noted. The door leaf is removed from the box again. The reverse parts of the hinges are fixed with screws on the frame of the box according to the final marks. Only then is the door leaf hung on the hinges. The quality of opening and closing the door is checked. In the end, all excess foam is cut off, the gap is finally smoothed out (if necessary, putty), and a platband is fixed to the box, which is a wooden or plastic strip, which is cut at the junction at an angle of 45 °. The platband is fastened with screws. It is better to fill and grind all the gaps and local defects found immediately. The installation of all the decorating elements captures the fact that we succeeded. Back to the table of contents</a>
Required Tools
Before you decide how to install interior doors yourself, you need to prepare the following tool:
- perforator;
- electric drill;
- Screwdriver;
- the Bulgarian;
- milling machine;
- hacksaw;
- A chisel;
- level;
- plumb bob;
- putty knife;
- a hammer;
- screwdriver;
- pliers;
- vise;
- mites;
- Clamp;
- roulette;
- line meter.
Installation of the interior door is completely accessible to any person.
