Passive solar and roof overhangs
I live in Northern NJ, and have a ranch house with a hip roof. The roof overhangs about 2 feet all around. It's a great design for passive solar. With the sun so low in the sky in the winter, it just pours in. And, in the summer, the roof overhang shades the windows nicely.
The only problem is that the house is too small, and we are definely planning on adding a second floor. I have been working on the plan myself, and have given much thought to the roof overhangs. I am leaning towards a home style that would have a large gable on the front and back of the house (east and west) with the roof sloping down on the sides (south and north.) The roof overhang on the south would provide shade on the first floor, and I would build dormers on the south side of the roof (presumably with overhangs as well) to provide headroom, windows, and ventilation to the second floor. I also have a mature maple tree close to the house on the south side, which provides a tremedous amount of shade.
Here's my problem: how am I going to prevent overheating of the first floor on the east and west? On the west, which is the back yard, I've planned a large arbor which I think will do a fine job when covered with vines during the warm months. But, how about the east? Am I doomed? Please don't say "less glass" because I really enjoy the views out the front, and my lot affords me plenty of privacy. I'm beginning to think that I need the large gables on the south and north instead, since I have the large shade tree on the south. I'm going for a "cottage" look. Something like a cape-cod type, with the dormers, yet, I need a lot of space upstairs. The only thing that I think would solve this delema is the prairie style, with hip roofs around both the first and second floors. Yuck! That style would NEVER fit in this historic neighborhood. I need ideas...