| 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) |