Scaffolding boards have a surprisingly short lifespan; for insurance reasons, they can only be used once. SB Architects, with offices in San Francisco and Miami, specialize in green solutions, and for a Mill Valley project they came up with a use for recycled scaffolding boards as a walling option. I recently paid a visit, and loved these planks on the stairwell, which feature a gently worn patina. N.B. Called the Hillside House, the structure is only the second LEED Platinum house to be certified in Northern California.