
The value in charring wood surfaces goes beyond visual effect
The ancient Japanese building technique of shou-sugi-ban, which involves charring wood surfaces, is gaining popularity in North America due to its aesthetic appeal and practical benefits. This method, traditionally used to preserve wood, creates a protective layer of carbon that is highly resistant to mold, insects, water, and even fire. The process results in a distinctive dark brown, bark-like appearance that designers like D'Arcy Jones find more interesting than traditional wood staining, as it exaggerates the natural beauty of the wood.
An example of this technique is a home in Okanagan Valley, where homeowner Jon Friesen and his father David charred the Douglas fir siding of their new house. They used a small propane torch to burn each board to a medium brown, then doused it with water. The surfaces were subsequently brushed to remove soot and achieve a smoother texture, with high-touch areas receiving a finer finish. This labor-intensive process offers a permanence that conventional wood treatments like stain and paint cannot match, as charred wood surfaces can remain intact for decades.
Historically, shou-sugi-ban in Japan involved burning cypress or cedar over an open flame, sometimes finished with oil. Japanese architect and historian Terunobu Fujimori has prominently incorporated this method into his work, drawing inspiration from historical precedents. In the Western world, the technique has seen limited use until recently. Swiss architect Peter Zumthor applied a variation in his Bruder Klaus Field Chapel, where a wooden structure built as a mold for concrete was burned, leaving charred imprints on the interior, creating a “slightly morbid narrative.”
Designer Deborah Moss of Toronto studio Moss & Lam also uses charring in her work, such as the "Torched Wood Screens." These hand-carved screens, depicting street maps of global cities, are charred and sealed, evoking the ephemeral nature of paper maps and the passage of time. Moss emphasizes the personal and resonant quality of charred wood, noting its raw, physical nature. While acknowledging that charred surfaces can create an unsettling effect in a home, architects like Jones believe this adds a humane quality, suggesting that "rooms are much more humane when there's a bit of darkness around," indicating a willingness to embrace deeper, more complex aesthetics in home design.
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