How it works
A bow window is four or more units of the same width, each set at a shallow angle to the next, so the assembly curves out from the wall instead of stepping out in three flat planes. It reads as a rounded wall of glass, and it takes up more wall than a bay does.
Where it fits an Inland Empire home
A bow needs width, so it lands in great rooms, family rooms and primary suites where there is a long uninterrupted wall to give it. If what you want is panoramic rather than a bit of extra depth, this is the one, and the structural work scales up to match.
What to watch for
Everything a bay needs, a bow needs more of. It projects past the wall, so it wants a knee wall or engineered brackets sized for a wider, heavier assembly, and the cap over the top has more linear feet of roof to wall joint to keep watertight. Neither is exotic work, but both are the difference between a bow that lasts and one that leaks.
The glazing decision matters here more than on almost any other window, simply because there is more glass. Every pane has to meet Climate Zone 10’s limits, a U-factor at or below 0.30 and a solar heat gain coefficient at or below 0.23 on most jobs, and a bow on an unshaded west wall collects heat across its whole width. If the room behind it is one you use in the late afternoon, treat the glass package as a decision rather than as whatever the window line ships as standard.