Exterior, House Building Type, Cabin Building Type, Wood Siding Material, Shed RoofLine, and Glass Siding Material San Francisco firm Lundberg Design built this cabin out of reclaimed materials, including the exterior redwood, which has aged into an elegant, ashen gray. In a past life, the pool acted as a water tank for livestock.  Photo 75 of 101 in 101 Best Modern Cabins from Beauty and Brains: Building Sustainably With Redwood