NRRI Research on Thermally ModifiedNorth American Wood Species

Most published thermal modification research has been conducted on European species using European test methods. The NRRI project — carried out by the Natural Resources Research Institute at the University of Minnesota Duluth — focused specifically on North American species evaluated according to American Wood Protection Association (AWPA) methodologies.

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This makes the dataset directly relevant to North American markets, specifiers and building codes, providing a credible, standards-based foundation for thermal modification performance claims.