James Hardie(R) siding is a sustainable and marvelous substitute for wood. It's available pre-colored and the finish truly looks like high-grade wood siding. I've used this product line for years, and have been delighted with the results. It's the only product I will consider substituting for wood, and in many climates it's significantly preferable because of its stability.
Sarah SusankaA Not So Big House feels more spacious than many of its oversized neighbors because it is space with substance, all of it in use every day.
Sarah Susanka