Home window replacement may be necessary if the components like framing, sliders and locks are worn out, warped or damaged, or you could want to replace window glass for purely cosmetic reasons, such as wanting a different style or window, different frame material, or different frame color. Also, keep in mind that technology has come a long way in recent years. Today’s residential windows are far superior when it comes to their insulating properties — modern vinyl constructed windows and advanced glass technology can improve your home’s energy efficiency, increase security measures and add home value. Both the glass and the frames play a role in this, so simply replacing the glass alone might not make a difference in energy savings.