I love the way Burr & McCallum has treated the sloped roofs, painting the eaves a red that contrasts with the brown-gray walls and frames. The red really accentuates the sawtooth form, as if it's the most important part of the house.
The snow visible on one of the roofs points out another consideration with sawtooth roofs: what to do so snow does not accumulate at the clerestory windows. One solution is to pitch the roof in two directions, not just toward the windows; another is to use heating coils at the low point of the roof.
Here is one place where the sawtooth relates directly to an individual room. The clerestory on the top right aligns with a garagelike retractable wall below, creating a large opening between rooms.
That door is visible on the left side of this photo. In the foreground we can see another clerestory that is independent of an interior partition. The natural light that the clerestories bring into the open space is beneficial, both in terms of reducing energy consumption and increasing quality of life.
The second Burr & McCallum project has sawtooth roofs that are not as substantial as the previous house, but they cap a striking second-story volume that cantilevers over an outdoor space. Like the previous house, these shapes coincide with windows that extend down the sides perpendicular to the roof, helping to give the exterior and interior a rhythm.
From the other side, we can see that the sawtooth roofs are accompanied by other means of bringing in light, mainly a large corner volume with glass on four sides.
Another view of the exterior also shows a row of small round skylights in another part of the house. This illustrates that while sawtooth roofs enable plenty of sunlight, they are not a sole solution, especially when siting and massing lead to a variety of ways of daylighting.
A last example, this time by Griffin Enright Architects, is more complex in its form, but the same idea prevails. Gaps between roofs allow natural light to enter the interior spaces. Here we see a low volume on the left and a high one on the right; the gap between them lets light into the latter.
But the ceiling of the taller volume (here looking toward the smaller one) is what is most special. It is folded to create small gaps that are filled with glass. It would be nice to see a bit more glass in the clerestory at top, but there's a good deal of other glass areas that bring in plenty of natural light.