Thermally modified wood: chemical-free durability for siding, decking, fencing and interiors
Heat, steam and pressure turn sustainably grown Ash, Poplar and Pine into wood that lasts up to five times longer than pressure-treated lumber.
Class 1 durability
Resists rot, decay and insects without chemicals.
Dimensionally stable
Less swelling, cupping and movement outdoors.
Interior and exterior
Siding, decking, fencing, saunas, walls and floors.
ThermowoodSidingDeckingFencing
Rainscreen and cladding
Thermally modified siding
Vertical-grain and flat-sawn Ash and Poplar profiles made in Pennsylvania, plus Lunawood Nordic Pine facade panels.
Decks, porches and fences
Thermally modified decking
Symmetrical profiles for hidden fasteners, structural end joints and boards that lay like flooring with less waste.
Wildfire-zone building
Fire retardant treated wood
Pressure-impregnated FRT lumber, plywood, siding and decking for WUI and Chapter 7A projects in California.
Feature walls and ceilings
Thermowood interior paneling
Ten species and 13 profiles for walls, hallways and ceilings, resin-free and chemical-free.
Eaves and porches
Soffits and ceilings
Knot-free Cedar, Hemlock and Ayous for long, straight overhead runs.
Living room to terrace
Exterior flooring
Indoor-outdoor floors in Ash, Iroko, Pine and Rhino Wood, boards to 16.4 ft.
Balconies and rooftops
Garden tiles
Click-together 20 x 20 in tiles in Ash, Pine, Iroko and Teak.
Shade structures
Thermowood pergolas
Posts, beams and battens milled to order in Rhino Wood, Hemlock and Ash.
Heat and steam
Sauna wood
Resin-free Ayous, Ash and Pine for sauna walls, ceilings and benches.
Pacific Northwest
Western Red Cedar
Vertical grain Cedar in Architectural Clear and Artisan Reserve grades.
Charred look, no soot
Shou Sugi Ban style
Deep black thermowood for facades, walls and ceilings.
Our brands
Three ways to modify
Three thermally modified wood brands, each suited to a different job.
Thermally modified wood products
The benefits of thermally treating wood have been known for millennia: Vikings heated wood to preserve it for ships, and the Japanese pioneered Shou Sugi Ban. Modern technology fine-tunes the process with the perfect combination of heat, steam and pressure to produce woods with five times the lifespan of pressure-treated and unmodified wood.
Hidden fasteners, structural end joints
Decking
Thermally modified wood decking designs are easy to work with. We use standard symmetrical profiles that work with off-the-shelf hidden fasteners. You choose which side of the board you see, and with our structural end joint the deck can be laid like flooring, with joints floating anywhere between joists. Less waste, less time.
Grown and made in Pennsylvania
Siding and rainscreen
Thermally modified wood siding and rainscreen is 100% grown, harvested and manufactured in Pennsylvania, the heart of the American hardwood forests. We offer a variety of profiles for the look you want, vertical or horizontal. Choose Ash for a bold, pronounced grain or Poplar for a smooth look. We are the manufacturer, so it is your call. Download the Cambia siding guide on our installation guides page.
Indoors and covered outdoors
Flooring and porch flooring
The same thermally modified Ash in tongue-and-groove flooring and porch boards, for bathrooms, kitchens, saunas and covered patios where untreated wood would move or decay.
Versatile and long lasting
Fencing and screens
Thermally modified woods are extremely versatile, which makes them a beautiful and long-lasting fencing and screen material. Call us about our extensive line of thermally modified fencing products.
Quality chain
From raw material to end consumer
Reclaimed Woods sets quality requirements for Thermowood to take responsibility for the environment, with a quality chain that runs from the source of the raw material to the end consumer. No chemicals are used in manufacturing, so heat and steam alone turn wood into a durable construction material, and at the end of its life Thermowood can be burned for bio-energy or recycled.
Eco labelled
Certified Scandinavian forest
Acting in the most cautious and environmentally friendly way is part of our DNA. All our Thermowood products carry the Scandinavian ecolabel and the wood is purchased from certified, renewable Scandinavian forest.
quality chain
Responsibility from raw material to end consumer
Reclaimed Woods has set, and will continue to set, quality requirements for Thermowood in order to take responsibility for the care of the environment. To ensure this, our quality chain goes all the way from the source of the raw materials to the end consumer.
Reclaimed Woods Thermowood is a sustainable wood with the high performance of tropical hardwoods. No chemicals are used in the manufacturing process, which provides a good basis for its ecological soundness. Applied correctly, heat and steam are sufficient to turn wood into a durable and impressive construction material. At the end of its life span, Thermowood, being a pure natural product, can be burned for bio energy or recycled.
made in the usa
Grown, harvested and manufactured in Pennsylvania
Our thermally modified wood siding and rainscreen is 100 percent grown, harvested and manufactured in Pennsylvania, the heart of the American hardwood forests. We offer a variety of profiles to get the look you want, whether vertical or horizontal. Go with Ash for a bold, pronounced grain, or Poplar for the smooth look. Download and read our Cambia siding guide for installation how-tos and best practices.
Thermowood explained
Common questions
The short answers. Our blog covers fire performance, deck railings and interiors in more depth.