Flax fibre insulation
Loose-fill or batt insulation made from short flax fibres. NL/FR/BE-cultivated feedstock. Good thermal + acoustic properties.
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Carbon properties
GWP A1–A3 (cradle-to-gate)
22 kgCO2eq/m3
From EN 15804+A2 EPD. Includes biogenic uptake where the EPD reports module D-1 with the biogenic carbon flag.
Biogenic carbon factor
-1.5 kgCO2/kg
Net biogenic carbon per kg of material. Negative = stored. Independent of process emissions.
In-use durability
60 yr
CRCF Carbon Storage Product (≥35 yr)
Eligible
Sink bucket: carbon storage product
Physical and structural
Thermal conductivity
0.038 W/m·K
Density
35 kg/m³
Fire rating (Euroclass)
E
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)
€0.34/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)
25,000 tonnes/yr
Aggregate known production capacity across documented producers in this material category.
Certifications
- CE
- Natureplus
Sources
- BIsovlas (2022). Flax insulation panels — technical product sheet. Manufactured in the Netherlands using EU-grown flax fibre. Reported lambda 0.038 W/m·K, density 25-50 kg/m³.