The following tips will be useful:

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The method consists of assembling the entire structure before attaching it to the wall. Both the frame and the extensions are assembled into one piece. The additional elements that expand the opening are attached to the door frame. After this, the finished product is fixed.


Nails are used solely to hold additional panels to the door frame. They do not prevent movement.
When drilling holes, a crack can be made on the austria mobile database side of the product and between the slopes. Therefore, all work must be done carefully.
Installing door extensions
Why do we need extensions and what are they? Before answering this question, we need to remember a little, and young people need to study history. How was it before? Each enterprise producing building materials strictly complied with the current state standards for its products. The sizes of bricks, blocks, panel slabs, etc. were regulated. Construction organizations had standards for the thickness of plaster. This allowed woodworking enterprises to produce joinery (windows and doors) with standard indicators of the sizes of door frames. After their installation in the openings, no additional adjustment with extensions for the casings was required.

Additionals. Photo

Today, everything is different. The vast majority of enterprises are guided not by state standards, but by their own technical specifications. This has led to the fact that the same brick or block from different manufacturers can have different sizes. Now no one can determine the thickness of the walls with certainty, it is impossible to make several standard sizes of door and window frames. A simple and effective solution was found. The frame is made with a minimum permissible width, guaranteeing its physical strength, and the missing width, depending on the thickness of the walls, is made up by installing extensions.

Professional installation will highlight the beauty of the door and the integrity of the structure.

What are additional fees?
Additional elements