Exterior, House Building Type, and Metal Siding Material Nearly 200 anodized aluminum fins—each one uniquely shaped—serve as a screen that shields the concrete walls from the wind and snow. The roof extends beyond the house at its southern end, shading the living room and a terrace. At night, a cutaway frames views of the star-filled sky.  Photo 9 of 10 in A Prairie Escape Embraces the Landscape with a Green Roof