To correctly make casings for the entire door,

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The height of the vertical elements is measured from the floor. The strips are placed on the floor covering from below, which is why the joints of the baseboards and door frames are on the side. When installing door frame on the hinge side, the width of the indent is taken into account. The indicators are measured on the workpiece and a mark is made. This will be the lower point of the 45-degree angle.
Having inserted the strip into the miter box, a cutting line is marked from the set point at an angle. The excess part is sawed off.
First, the blanks are baited in two places so that they can bend back at the top. The nails are cut off with nippers and hammered into the door frame: one - just above the floor, the other - at a distance of 1 m.
The length of the nails without heads should not be greater than the thickness of the strips. It is optimal to make a protrusion of 5 mm for the pins. The casings are placed against the door frame. At the location of the nail, a wooden block wrapped in cloth is applied to the blank, and the vertical strips are placed on the pins with light hammer blows.
Docking at an angle of 90
Fastening casings at 90 degrees is carried out with horizontal or vertical seams. The choice depends on the owner's preference. When installing door trim with your own hands at a right angle, only flat blanks are used. The cut areas are treated with varnish or acrylic paint.

To install trims on interior doors, with imitation of a lintel, the upper element is extended. The joint is at an angle of 90 degrees with horizontal seams. The upper bar protrudes czech republic mobile database the vertical ones.

Telescopic trims are fixed to interior doors without nails. Decorative elements are equipped with a special lock consisting of a slot and a groove. Fixation occurs to the end of the frame. The main requirement for the correct installation of trims is the presence of a ledge. It is formed when the door frame is already the thickness of the interior partition. Adjacent walls must be even, otherwise an unsightly gap will result.

Instructions for installing plastic trims
Glue is used very rarely, the connection is unreliable. Basically, plastic trims on interior doors are installed using a profile. This installation method consists of the following steps:

A special profile is cut to the size of the door frame. The blanks can be made 5 mm shorter. This will not play a significant role, they will still be hidden under the trim.
4 long and 2 short elements are cut off for both sides of the interior door. The connecting ends are sawed off at an angle of 45 °.
The mounting profile is fixed to the door frame with screws. This option will not work with cheap Chinese doors. The frame is made of thin metal, it is impossible to tighten the screws tightly. In this case, the mounting profile is fixed to the wall, but it must be strong, preferably without plaster.
The profile is screwed with screws from the middle, moving to both ends. All curvatures are corrected using a plumb line or level.
After installing the mounting profile, measure the height of the side elements of the trim and saw off the ends at an angle of 45 degrees. The process is identical to that for wooden or MDF strips. The blanks are inserted into the groove of the vertical mounting profiles, where they can move.