Window Terms Glossary

Egress window: Is a window large enough that is required in specific locations in a dwelling and is intended to provide an emergency exit.  Windows must meet specific building codes, size and requirements.

E-Value: the reflective value of a window to help prevent heat from escaping and reflect long-waveheat energy, the lower the value, the better the insulating quality of the material.

Extension Jambs:

Eyebrow windows:  is rectangular on the bottom and slightly arched on the top.