Extraction, refinement, production, transport and assembly of building materials consume energy and produce green house gases. Following construction, building operations, maintenance and end of life dismantling and recycling are also energy intensive. Architectus selects materials with low embodied energy, no unhealthy by-products and amenable to re-use or re-cycling. Renewable timber products that sequester carbon are very desirable. Local materials are preferred, as are less highly processed and more durable materials. Careful detailing can reduce material waste and enable future dis-assembly rather than demolition. These environmental choices can often be seen in the restrained material palette, simple geometries and clean lines of our projects.