No Roof on Bay Window.

[LenoreR]

I cannot figure out how to get a roof onto my bay window. I have tried deleting the roof and rebuilding it, making invisible walls, and nothing will work. Originally while playing around with the program, I put on a bay window and there was a roof. Later when I went back and placed a bay window on my wall, there was no roof. I've tried everything I can think of. Any Ideas? I have attached a picture of the problem I am having.