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Hempcrete blocks

Pre-cast blocks of hemp shiv + lime binder. Non-structural infill for timber-frame walls. Highly vapour-permeable, breathable, fire-resistant.

Hempcrete blocks, a biobased construction material
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Carbon properties

GWP A1–A3 (cradle-to-gate)

-0.7 kgCO2eq/kg

From EN 15804+A2 EPD. Includes biogenic uptake where the EPD reports module D-1 with the biogenic carbon flag.

Biogenic carbon factor

-1.7 kgCO2/kg

Net biogenic carbon per kg of material. Negative = stored. Independent of process emissions.

In-use durability

75 yr

CRCF Carbon Storage Product (≥35 yr)

Eligible

Sink bucket: carbon storage product

Physical and structural

Thermal conductivity

0.065 W/m·K

Density

300 kg/m³

Fire rating (Euroclass)

B

Structural

Non-structural

Compliance and market

NTA 8230 biobased calc

Compliant

Dutch standard for biobased-share calculation; recognised by partner curators across the EU as the canonical method.

MPG shadow price (NL)

€0.42/m²

Milieuprestatie Gebouwen — Dutch environmental shadow price contribution per m². The closer to zero (or negative), the better the project scores against the Bepalingsmethode.

Supplier capacity (annual)

12,000 tonnes/yr

Aggregate known production capacity across documented producers in this material category.

Certifications

  • CE
  • ATG (Belgium)
  • Natureplus

Sources