Installation is possible using special nipples and self-tapping screws.

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Connectors - corner fittings - are placed in the cut of the trims. The upper bar is measured and sawn off at both ends at an angle of 45 degrees. The blank is joined with connectors to the vertical trims, snapping into the mounting profile. The corner fittings completely hide the joint, even if there is a gap.
If the plastic trim is installed on a wall covered with clapboard, then a wooden strip is fixed along the perimeter of the doorway, and the profile is attached to it.

Elimination of disadvantages
An unpleasant moment is the visibility of the head of a nail or self-tapping screw. They are slightly recessed into the body of the casing, and sealed with a sealant of the desired color on top. You can use a wax corrector.

On uneven walls, due to the curvature of the wooden planks, the joints diverge. During installation, the joining elements are additionally connected with a finishing nail.

Wide planks from 100 to 120 mm help to cyprus mobile database large defects around the door frame.

How to install door casings with your own hands
How to install casings on an entrance door: the main stages of installation:

Cutting the side casings. First, measure the distance from the floor base to the upper crossbar of the door structure. An additional 1 cm is added to this value. The corresponding marks are made on the casing, after which its edges are sawed off at an angle of 45º. A miter box is used for this. To prevent discrepancies in the slats at the joints, measurements are taken individually for each workpiece. This can be explained by possible distortions of the doorway.
Fixing the door trims. The side strips are initially fixed from the bottom and in the center. They are fixed in the upper part after the lintel is installed above the door structure (this stage of installing the door trims is controversial - some people prefer to fix the upper strip first, and then the side strips).
Cutting the upper lintel. This element of the structure is first placed under the allocated side strips, aligned, marked, and the excess parts are sawed off. Only after this are all the strips fixed.
Types of fastening door trims: