Narrative:
The project has a simple material palette, exposing structure and minimizing finish materials in most spaces. Almost all of the wood, from framing to cladding to finish, is FSC certified. After much debate, the project specified second-growth cedar siding (with ample knots) in lieu of clear old growth cladding. The design uses advanced framing to optimize lumber use including 24" o.c. framing which reduced lumber use by around 30 percent, offsetting the added cost of FSC-certified lumber while reducing thermal bridging.
A number of materials in the new design were salvaged from the work that was demolished. The timbers that formed the old Step-Up Courtyard were milled into new benches used around the campus. Existing concrete slabs were saw-cut to form new 1'x6' "pavers" at the new Entry Grove and local boulders were used in the creek restoration.
Children are more sensitive to toxicants than adults and material choices were screened to minimize exposure to VOCs and toxicants. A full range of material specifications and other IEQ strategies were incorporated to earn LEED for Schools Platinum rating.
Material & Construction
source: http://www.aiatopten.org