08/20/2026
Located in Chester, Maine, Treeline is positioned squarely at the intersection of our heritage and a bright future. Founded in 1984, Treeline’s office is steeped in history with photos from its inception on proud display. But what makes Treeline truly unique isn’t just it’s contribution to our heritage forest industry, but also the forward-thinking and nimble mentality that has transformed it over the decades into the multi-faceted company that it is today.
From logging, trucking and forest management to road, site, and bridge construction, wood products, firewood, a full-service truck service center and more, Treeline is a highly diversified company with exciting plans for the future. While yesterday’s tour focused on the hemlock sawmill that primarily produces rough sawn lumber, timber mats and dunnage, MFPC was excited to learn more about owner Brian Souers’ vision for the future.
Just up the road from the existing sawmill is a shuttered mill site being rehabbed to add a second mill location to add value to Treeline’s hemlock lumber with planning, kiln drying and thermal modification – the process of baking wood in a special low-oxygen, high heat oven to remove moisture and stabilize the wood by breaking down some of the less stable components. Thermally treated Eastern hemlock is resistant to mold, mildew, and rot. The process adds dimensional stability and importantly, it competes in outdoor applications with pressure treated southern yellow pine without the added chemicals.
While this technology isn’t new, there’s currently only a handful of ovens in North America, so Maine contractors are dependent on imports from Europe and Asia to meet demands for thermally modified wood. Brian’s vision at Treeline will open the door to this largely untapped new market.
It is exciting to have had the opportunity to learn more about thermal modification, it’s potential and the work Treeline is doing through private partnerships and with UMaine’s Advanced Structures and Composites Center for product testing. Hopefully soon, Treeline will begin adding value to an underutilized, underappreciated and undervalued species of wood right here in Maine.
Teeline’s vision could change the market for hemlock in Maine entirely. Thanks to Brian and Josh for taking the time to meet with MFPC, and for the work they’re doing to bring our heritage to into the future.