At the time of installation, there is often a drastic deterioration of the performance measured during laboratory tests, which is mainly caused by a lack of care in the installation process.

In many cases, installation is responsible for the so-called “non-quality” in the theory of quality. In practical terms, this means defects and flaws in the work, i.e., costs necessary to restore the expected quality of the work.

It is important to emphasize that the installation procedures transversally affect the entire production process of windows, doors, shutters and curtain walls, from design to installation.

Appropriate installation procedures must first be established at the design stage and then implemented, within the limits of mutual responsibility and competence, by all operators involved in the site with the aim of ensuring, as effectively as possible, the performance obtained in the laboratory.

Generally, the installation of windows and doors must be performed to meet a set of technical requirements that are applied to the system consisting of the frame and the vertical closure.

Installation thus involves the so-called “workmanship rule,” i.e., the operating procedures, but also the responsibilities of the various operators:

  • the designer
  • the construction company
  • the window and door manufacturer, in their role as supplier of the product and possibly as installer
  • installer