Casement Centering

Sagging window construction: causes and solutions

The sash geometry is the exact coincidence of the parameters of the glass. If the indicators of width, height and diagonal do not match, this indicates incorrect installation of the structure or factory defect, which over time can lead to problems, up to cracking of the double-glazed windows.

Also, the causes of such a defect may be:

  • mastic, which protrudes beyond the boundaries of the glass, contributing to the deformation of the structure;
  • shrinkage of the house, which also affects the change in the geometry of the structure;
  • excessive load on the frame (for example, drying things on the windows).

To resolve this issue, you should run sash centering.

Stages of restoration of structural integrity

Sash geometry alignment should be performed only by the master. This process is quite laborious and requires special skills and knowledge. Therefore, if you have never done such a job before, it is not recommended that you do it yourself.

Aligning sagging sash begins with the dismantling of glazing beads and fixing the double-glazed window. Next, the pressure of the hardware is weakened and a proppant type plate is searched. The wizard determines how correctly they are installed, because often the cause of the defect is precisely the incorrect installation of these elements.

If, after regulating these components, the defect is not eliminated, the master additionally installs building elements 1-3 mm thick in the upper corner of the structure, located opposite the loop.

After alignment of window sash geometry completed, the window service specialist checks for compliance of the strike plates with the locking pins.

In the event that you find yourself in such a defect, do not delay the repair. Contact a specialist immediately for help. The master, having identified the cause of the problem, will execute restoration of window sash geometry, allowing to prevent further damage to the structure.

If you do not know where to find a good window repair specialist, please contact us. Our company provides only quality window repair services. We offer our customers the best conditions for cooperation.

If you have any questions, call. Our consultants will answer them and help you place an order for a call to the window service wizard.


Reinforced-plastic structures (windows, doors, balcony systems …) are a high quality product. Despite this fact, nothing lasts forever. Even the best design can fail after a long period of time, poor operation or harsh climatic conditions. One of the main prerogatives of our company is the resuscitation (repair) of metal-plastic structures.


Hot Line: 38 (044) 383-26-16, 38 (067) 430-40-09

All work begins with diagnostics, and only after a thorough check of the design of the service consultant and your consent, the master at the appointed time with the right tool and material begins to work.


We produce

  • Window systems production;
  • Door production;
  • Design of balcony systems;
  • Window hardware manufacturing;
  • Production of mosquito nets;
  • Supply and ventilation valves;
  • Windowsills of famous brands;
  • Manufacture of metal components (Visor, inflow reduction ….) of any shape;
  • Anti-burglary systems, child protection systems;
  • Handles;
  • Blinds – vertical, horizontal, day-night, roller blinds, Roman, wooden.

Our company “Ilbosko” will not only provide you with quality service, but will also be able to install a new metal-plastic of any complexity, taking into account any wishes. And also provide a full range of components and consumables.


Benefits of working with us


High quality guarantee


100% personal responsibility


Latest developments


More than 10 years of experience


Free diagnostics


044 383 26 16

067 430 40 09

093 638 11 59





St. Nikolaya Zackrevskogo 34E





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