The roof is the building, its contents and occupants’ primary protection against rain, snow, hail, wind, cold, sun light and sun heat.
Basic terminology:
The roof pitch is the angle at which the roof rises from its lowest support (pitch plate) to its highest point (Example: the ridge).
According to US DOE EERE (US Department of energy, energy efficiency and renewable energy), inefficient windows, doors and skylights are responsible for over 25% of heating and cooling cost in a typical home.
Windows are an essential and expensive component of home construction that ensures ventilation and fresh air to perimeter rooms but also keep out wind, rain or snow, allow daylight to brighten the interior of the house and with good design will enhance the aesthetic beauty of your home.