Exactly. Roof overhangs can provide the same kind of benefit if well designed. The sun is "higher" in the sky during summer so the overhangs provide shade for a

Exactly. Roof overhangs can provide the same kind of benefit if well designed. The sun is "higher" in the sky during summer so the overhangs provide shade for a building's windows, and the sun is "lower" during winter, allowing the sun's rays to hit the windows, providing some heat for the buildings. Gotta love low-tech self-adapting systems like these.