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Map showing where hempcrete Appendix BL is actually law: three US jurisdictions in force, three more in motion, California declined.

Map showing where hempcrete Appendix BL is actually law: three US jurisdictions in force, three more in motion, California declined.

Hempcrete Is in the American Code Book. In Three Places, It Is Actually Law.

Hempcrete is in the 2024 International Residential Code. It is actually law in three American jurisdictions, not forty-nine states. Part three traces the route from England to the American code book, and corrects a claim our own industry keeps repeating.

Aug 18

2026 by U.S. Hemp Building Association

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