Pioneer Millworks Larch Siding & Shiplap: The rot resistance of this underutilized species rivals that of Douglas fir which makes it a great option for exterior or interior uses. The signature swirling grain and small tight knots of Larch brings a natural finish to vertical applications, and all of our Larch products are made from sustainably sourced PEFC (Programme for the Endorsement of Forest Certification) trees grown in the Pacific Northwest. Pair it with one of our color options which show off the wood grain patterns through hue and tone; it has been brushed which enhances color saturation & adhesion. Shown here in Harbor; a seaside grey.