Do you have any drawings or plans for your top? I have been thinking about doing top pitched entrances because of the high heat I get here during the summer.
Sorry, I missed your post.
I don't have any plans, it was just a simple throw together. It sits on top of the top super with no overhang, so it is 16-1/4 x 19-7/8. I think I used a propolis trap instead of an inner cover to inprove ventilation. The front was 4" high and the back was 1" high and the sides angled from 4 to 1. I topped it with a piece of luan and aluminum flashing.