To solve this

Very often, due to the complexity of the glass facades, you can encounter production defects. One of these defects is the effect of concavity, which, as a result of such deformation, creates active distortion. Its reason lies in the difference between atmospheric pressure in places of operation and in producing places. To solve this problem, where you need to get a mirror screen, use not double -glazed windows, but simple single, but rather thick sheet glass, using a point mount. In addition, the source of distortion may be poor glass hardening, unprofessional installation of the glass of glass, or incorrectly selected glass thickness.