Anyone who needs to choose windows for a new home has a lot of decisions to make. In this article, I’ll try to provide an overview of some of the factors to keep in mind when ordering windows.
Most building codes require that every bedroom include at least one window that meets emergency egress requirements — in other words, a window that is large enough to allow a person to escape during a fire. These requirements can be found in 2012 IRC Section R310.1.
If any part of a basement has been turned into habitable space, then that area also needs at least one egress window.
To meet emergency egress requirements, a window:
Note that a window that barely meets the minimum width and height requirements is not large enough to meet the minimum area requirement.
Fixed or operable?
Once you’ve specified at least one operable window for each bedroom and, if necessary, for the basement, you can think about how many of the remaining windows in your house should be operable.
For example, let’s say that your living room will have four windows. Should you buy four operable windows? Or should you instead consider buying two fixed windows and two operable windows?
In most cases, it makes sense to resist the temptation to make every window operable. Look around your house and think about which windows really get opened on a regular basis. Most don’t.
Fixed windows have several advantages: they’re less expensive than operable windows and they are almost always less leaky. So whenever it makes sense, choose fixed windows rather than operable windows.
Cross ventilation and light from multiple sides
Any room with more than one exterior wall should probably include windows on different walls. There…