Fenestration In The Building Industry
Content courtesy of Energy Education
Fenestration refers to the openings in the building envelope, including the installation of windows, doors, and skylights.
The inclusion of windows and other openings in the home are necessary as they improve the overall environment inside the home, however they do work to break the seal of the home, providing possible places for air, water, and cold air to enter the home. Thus, the number of openings included in a home must be taken into account, as well as the quality of the materials used to create these openings along with the placement.
Guidelines for how a home must include windows and doors varies across the Pacific Northwest. For colder regions, the necessary factors for a window or door to be considered energy efficient are more strict. In these cold, northern regions windows can only have a maximum U-value of 1.20Wm2K whereas warmer regions can have a u-value of up to 1.80Wm2K and still be considered energy efficient. Generally speaking a lower U-value indicates a higher level of insulating power. Due to varying rules, regulations, and environmental necessities it is important to do research to ensure that the windows and doors installed in a home are suitable.