Shou Sugi Ban sourced from Austin-based Delta Millworks is used as siding on this Napa Valley home designed by Bevan & Associates. Shou Sugi Ban, a Japanese exterior siding technique that dates back to the 18th century and preserves wood by charring it with fire, has recently been making a comeback in home design. At the time of its inception, Japan was plagued by wildfires. By charring the wood before it is installed, the highly flammable cellulose layer can be neutralized, which in turn increases the wood’s resilience and reduces its flammability. The burned wood, with its dramatic and modern look, has recently been used by many Sonoma and Bay Area architects.