Had to go out for an errand and while out I took a good look at houses and their roofs. There are almost no exceptions. Houses with roofs facing either south or west have icicles all along the edge of that roof face. Look on the opposite side of the street and I see houses with zero icicles on the north or east sides. So either we have a significantly different weather here up north, we have an extraordinary number of houses with poorly insulated roofs or we have alot of solar melting. I don't recall witnessing much dripping off the icicles during the night, only during the day. Then why is the warmest surface temperature on my ceiling out of line of sight of the stove? Why do I not have icicles forming over that section?