The life of a wall,
from seed to structure.
Every hempcrete panel carries the memory of a field. Follow the material from germination to a wall that will outlive the people who built it.
Seed to Canopy
Industrial hemp reaches four metres in eight weeks, pulling CO₂ from the air at a rate no other annual crop matches. One hectare sequesters roughly 9–15 tonnes of carbon before a single block is pressed.
Stalk to Shiv
After harvest, the woody core — hemp shiv — is separated from the bast fiber through natural retting. The shiv's silica-rich surface bonds with hydraulic lime to form a matrix that breathes like living wood.
Hands in the Mix
Three parts hemp shiv to one part hydraulic lime binder. Water activates a slow carbonation that continues for decades — the wall literally grows harder as it ages, unlike Portland cement which peaks and degrades.
Patience as Process
Panels cure in controlled conditions for 28 days before testing. The lime carbonates around each shiv, locking carbon into mineral form. The result is a panel that won't rot, won't off-gas, and won't burn.
Numbers your engineer
will actually trust.
Every value below comes from third-party laboratory testing. Thermal imaging, moisture probes, load cells — not marketing copy. Download the full spec sheet to hand directly to your structural engineer.
Whole-wall R-value at 300mm = R-30
Zero vapour barrier required in most climates
Tested to ASTM E72, load-bearing with timber frame
Sequestration exceeds production emissions by 3:1
No flame spread — lime matrix chars without combustion
Hemp shiv absorbs mid-frequency resonance naturally
Zero thermal bridging across the full panel face. The wall is as consistent as the data.
Download the
Builder's Spec Sheet.
Forty pages of lab-verified data: full R-value tables, moisture permeability curves, structural load calculations, mix ratios, and regional hydraulic lime sourcing. Written for the engineer's desk, not the marketing brochure.
Get the spec sheet
No follow-up sales calls. Just the document.
A decade of standing still
while everything else moves.
One hempcrete home, photographed every season for ten years. No touch-ups, no remediation, no drama.
First spring after completion — lime bloom still visible on the exterior face.
Peak summer — thermal mass keeps interiors 7–9°C cooler without mechanical cooling.
Six years in — the wall has hardened further as carbonation continues.
A decade standing. No cracks. No mould. No remediation. The wall keeps improving.
The Material Library —
no email required.
R-value tables, moisture permeability charts, regional supplier maps, and mix design databases. Fully open. No gate. Because the material earns its own specification.