A glass pane are by far the most important part of any window. It to a large extent bespeaks the window's light, heat, and noise permeability. Apart from light, windows let through cold, heat, noise, and deleterious ultraviolet rays. Regular glass is permeable to heat, noise, and almost the entire sun light spectrum. It's also fragile and easy to break.

Glass panes consist of several sheets of glass joined together by a frame. The main part of a glass pane - the glass itself - can be transparent, laminated, patterned, tinted, opaque, reinforced and so on. The requirements raised towards the glass are particularly high: it has to be safe, render the aesthetic image as objectively as possible, and protect against cold, heat, excessive light, and noise. The glass produced today using advanced glass coating technologies does not only protect the inside from the sun but also ensures complete transparency and particularly good light permeability.

Low e glazing
  • heat saving glass panes with selective glass are filled with argon;
  • noise cancelling glass panes use thicker external glass which makes for good noise and heat insulation;
  • sun control glass panes use the kind of glass that reduces permeability of the sun's energy;
  • safety glass panes have laminated or tempered glass that is resistant to impacts.
    A window's heat insulation properties depend not only on the glass but also on the frame that joins the glass sheets together and can be made of:
  • Aluminium. Aluminium frames are marked by rather high heat conductivity. It acts as a so called "heat bridge" which causes windows to have dew along the glass pane perimeter on the inside.
  • Plastic. This frame is considerably less conductive to heat. A warm frame improves the quality of windows, reduces the likelihood of occurrence of dew, and extends the possible service life of windows.