INVADO Sp. z o.o.
Dzielna, ul. Leśna 2
42-793 Ciasna

Phone +48 /34/ 35 10 540


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No door can function without a frame. In new apartments or houses, frames have to be installed in every door opening. If you have a space that has already been furnished, however, you also might want to replace the frames after some time.
How to select the most suitable frame?

What does the law say?

According to the construction law, interior doors should be at least 90-cm wide (Regulation of the Minister of Infrastructure of 12 April 2002 on the technical requirements for buildings and their location, Journal of Laws of 2002, No. 75, item 690, Chapter 3, § 62.1). Smaller dimensions are made primarily because the standard doors until the mid-1990s had a width of 60, 70 and 80 cm, and they were installed in accordingly smaller door openings.

Take an accurate measurement first

Before heading to the store to find your new frame, carefully measure the opening in which it will be installed. Measure the height, width and wall thickness, without forgetting the diagonals (to make sure they have the same length).

Fixed and adjustable frames

Normally, frames are made for interior walls with a thickness of 9.5 cm. That is the case with fixed frames. Don’t worry, however, if the walls of your apartment are thicker or thinner. The INVADO range has adjustable frames, which are precisely the answer to your problem.
Note, however, that the way they are installed is different – the fixed frame is installed directly in the bare wall, before any interior finishing work. The adjustable frame, however, is installed only after all other activities have been completed.

Metal frame cover

If you want to replace your existing metal frame, you normally have to be ready to cut it out of your floor and walls. Alternatively, you can also use the metal frame cover offered by INVADO. The cover is easy to install, and it will let you fit new doors to give a neat look to your interiors.