| material | thermal (W/m·K) | acoustic performance | moisture behavior | durability | density (kg/m³) | fire resistance | sustainability |
|---|---|---|---|---|---|---|---|
| dadap (erythrina) | ~0.04–0.06 | good (fibrous absorption) | breathable, seal to protect | low–moderate | 150–250 | moderate (chars) | very high (fast, local biomass) |
| cyathea trunk | ~0.03–0.05 | excellent (open-cell) | absorbent, needs sealing | low (if raw) | 100–200 | moderate | high (regrows in wet forests) |
| coco peat | ~0.04–0.06 | good (mid-high frequency) | retains water, risk of mold | low | 100–250 | low (smolders) | very high (waste product) |
| sugar palm fiber | ~0.04–0.06 | good | hydrophilic, air-dry needed | moderate (if sealed) | 120–200 | moderate | high (local fiber resource) |
| areca sheath | ~0.05–0.07 | fair | prone to fungi, slow to dry | low | 200–300 | low | moderate (leaf waste) |
| oil palm trunk pith | ~0.05–0.08 | good (low-freq dampening) | holds moisture, degrades fast | low | 150–250 | low | high (abundant waste stream) |
| balsa | ~0.04 | fair–good | fragile in humidity | low | 120–200 | low | moderate (plantation grown) |
| hempcrete | ~0.07 | very good | breathable and humidity-buffering | high | 300–400 | high (lime matrix) | very high (hemp + lime) |
| sheep wool | ~0.035 | excellent (full range) | regulates humidity | moderate | 30–50 | self-extinguishing | renewable (animal fiber) |
| mycelium panel | ~0.03–0.05 | excellent | biodegradable, seal to protect | moderate | 40–80 | fire-resistant | extreme (grown on biomass waste) |
| rockwool | ~0.035–0.045 | excellent (industrial) | hydrophobic | very high | 40–150 | non-combustible | low (high-energy manufacture) |
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