6. Cut and add the "projection" to the back, on the top
7. Put the frame in the window and mark and drill holes for fasteners (if using)
8. Fill, sand, prime and paint the frames
9. Cut and prime and paint the trim pieces to cover the screening on the front
The full list of steps can be found in the series post number 5 here. The first in this series is here. The most recent in the series is here.
But first, we have to name this "projection" because we're going to talk about it a lot today, and the word "projection" just isn't descriptive enough. So I am going to call it the "bug stop," both because it stops bugs, flies and other critters from flying over the top of the screen, down between the screen and window, and thus into the house. And also because it fits between the two blind stops, and so that will help us remember where it goes and what it does.
To see a demonstration of the "bug stop", see #10 in the series, here.
6. Cut and add the "projection" or Bug Stop to the back, on the top:
So, to cut the Bug Stop, you have to measure the distance across the window between the blind stops. Preferably, you are measuring at the meeting rails, because that is where the top of the window screen sits, like so, from the outside:
9. Cut and prime and paint the trim pieces to cover the screening on the front:
So now, you want to measure the rabbeted front edge of the frame, and miter cut the trim to fit:
And then, prime and paint each piece of trim. Since these are best if the fit is tight, we marked each individual piece with tape flags, attached with pins (sewing pins), marking the four Left, Right, Top and Bottom pieces for each screen, as you can see.