Proper, professional installation is as important to the total performance of a window as the manufacturing process and materials used.
The quality control measures taken in the manufacturing plant, which ensure a high quality window that meets or exceeds current performance standards, can be nullified if any step in the installation process is performed improperly. Poor installation not only can affect the window's thermal performance, but also the safe, smooth operation of the window. Indeed, aside from seal failures, over 80% of service problems with windows result from poor installation practices.
