How to Install a Bay Window: Part 2
With the roof built, it’s time to tackle the installation.
Synopsis: In part 1 of this two-part series, Rick Arnold began a bay-window installation by building the roof on the ground. In part 2, Arnold describes how to install the roof and the window. After setting up a two-level piece of scaffolding, Arnold and an assistant move the window into the rough opening from the outside. Then they temporarily secure the head board so that they can shim and fasten the window in place. After the window is secured, they insulate and install the roof. With the roof in place, they install stainless-steel cables to keep the window from sagging over time. The tops of the cables are attached under the roof, and the bottoms are attached to the seat board near the angled corners farthest from the building. The cable ends are accessible for adjustment later, if necessary. To complete the job, Arnold and his assistant install the flashing, the roofing, and the trim.
Part one of this article is available here.
Magazine extra: Watch this video series for Rick Arnold’s method of building a bay-window roof.
A bay window is a great feature in almost any room. The bright projecting space is perfect for setting plants, reading a good book, or simply brightening an otherwise dark or boring room. I recently replaced a twin double-hung window with a 45° bay window in my parents’ house. To make the installation easier, I chose a model that would fit in the existing rough opening.
Setting the stage
Because installing a bay window is more complicated than installing a conventional window, I’m covering the process in a two-part article. The first part showed how to build a hip roof for the window ahead of time. Here, I’ll show how to install the window and integrate it into the existing wall.