subject: Installing Bay Windows [print this page] 1. Step one in this process is to read the instructions that come with the bay windows. They all tend to be slightly different, so you want to be sure you pick up on any subtle difference.
2. Next, if the opening for the bay windows isn't already cut, you'll need to do that, and it's best to use a power saw to do it; by hand will be tough. When cutting the hole, make it about one-half to three-quarters of an inch too big; this extra space will allow you to adjust the window to get it level and plumb, and also provide room for contracting and expanding as the temperature varies.
3. After that, drill holes all around the edge - top, sides and bottom - and counter sink them. These will hold the screws that keep the window in place.
4. The next step is tough for one person to do - lifting the bay windows into position. It's best for two people to do it, being careful to keep the frame steady; twisting it can break a window pane. Put in the screws at the top, but don't tighten them down.
5. After that, put in the bottom and then the side screws - again, not too tight.
6. Use a level to make sure the window is level and plumb, adjusting with shims as needed, and then tighten the screws down.
7. Then cover the tops of the screws with the plugs or caps.
8. Finally, you'll need to finish the edges. Add some insulation around the bay windows, cover with drywall on the inside and shingles or siding on the outside, and then stain or paint.
If you live in a southern region and the windows are going to get a lot of summer sun, put some film over the panes to reduce the amount of sunlight you get in the house. After that, you're done.
