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slug: materials-chemistry
created: 2026-05-06
updated: 2026-05-13
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# Materials, Chemistry, and Bio-based Substrates

Cement, steel, glass, mass timber, hempcrete, mycelium, lime, and the chemistry of binders, finishes, and coatings as they bear on recovery.

The first entries in this section test a useful tension: bio-based origin is not the same as circular performance. [Hempcrete and Bio-Based Wall Systems](hempcrete-bio-walls.md) and [Mycelium Composites in Construction](mycelium-composites.md) can both replace more carbon-intensive products in the right assembly, but their claims depend on binder chemistry, moisture control, coatings, code pathway, documentation, and end-of-life handling.

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- [Next: Hempcrete and Bio-Based Wall Systems](hempcrete-bio-walls.md)
- [Previous: Cross-Laminated Timber (CLT) and Mass Timber](clt-mass-timber.md)