What Is Thermally-Modified Wood Decking from Rockwood™?

Rockwood Is A Domestic Supplier

...of eco-friendly sustainable European Hardwoods and American Softwoods

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The History of Thermo-Treated Wood


During the past 20 years, European companies have perfected the process of thermally-modifying softwoods to enhance their durability, longevity, dimensional stability and more. In 2004, the European Union banned chemical additives for wood protection, resulting in the need for eco-friendly wood treatments and a growth of 30% each year in the thermo-treatment lumber market.

Although European countries have exported these products into North America for many years, Rockwood™ is a domestic supplier of thermally-modified hardwoods, which allows for reduced shipping time and costs in relation to importing these products from overseas.

The Process of Thermally-Modifying Wood


The process of thermally-treating lumber includes gradually-heating wood up to temperatures of 410-450º F to create permanent reactions within the materials.

These changes include:

  • Creation of a rich, deep brown, color to the wood
  • High-weather resistance
  • Increased durability
  • Heat-resistance
  • Maximized longevity

Thermo-treated wood also weighs less, is dimensionally-stable, and will not split, rot or warp over the years. Because of this, we offer a 25-year warranty when the product is used outdoors.

Eco-Friendly Benefits of Thermo-Wood


Rockwood™ thermally-modified wood is eco-friendly. It is wood not treated with chemicals or plastics and serves as a viable alternative to imported tropical rainforest wood. So, while it’s similar to rainforest wood in look and quality, it doesn’t pose a threat to the rainforest ecosystem and eliminates the cost to buy rainforest wood and bring it to the United States.

The Rockwood™ Difference


At Rockwood™ thermally-modified hardwoods, we have partnered with two cooks/manufacturers for the products we offer.

One is a domestic manufacturer in Georgia who has been in business for 7 years and patented the process of thermally treating American Hardwoods to bake out the sugars and fibers that serve as a food source for fungus, mold, and decay (all deterioration factors for traditional lumber).

We also have an international manufacturer that supplies us with thermally-modified European Softwoods.

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