"We wanted the wood to appear as natural as possible, so leaving the larch untreated was the first choice," Bas explained. But the shape of the house would make the wood turn gray unevenly, so they blackened the larch. "The clients were excited with the dark color as it helps the house blend into the trees. They didn’t want the anything excessive or showy." But blackened timber comes with its own challenges. Since it absorbs more heat, a larger air cavity was built behind the wood to keep it cool.