Hemp Block Blocco Ambiente Hemp-Lime Block
A prefabricated hemp-lime block of hemp shiv bound with hydrated lime, laid as an insulating infill within a structural frame. Blocks cure for three to six months, and continue to reabsorb CO2 through carbonation over the life of the wall. The declaration covers the 20 × 50 × 30 cm block.
Carbon and evidence
Product Evidence
Evidence currently held for the The Hemp Block Company product record.
Recorded Carbon Result
A1–A3 GWP-total per m² of 300 mm wall, summed from the declared A1, A2 and A3 columns. The EPD declares B1 = -22.2 kgCO2e as the lime carbonates over the wall's life and C4 = -8.17, giving a declared whole-life total of -13.3 kgCO2e/m² — net carbon negative over the full cycle, unlike the A1–A3 figure alone.
Indicator: GWP-total
A1–A3 covers raw-material supply, transport to manufacture and manufacturing. It is product-stage information, not a whole-life result.
Environmental Product Declaration
EPD recorded- Coverage
- Specific product
- Declared unit
- 1 m² of wall = 0.30 m³ of product
- Programme
- EPDItaly (ICMQ, accredited by ACCREDIA)
- Registration
- EPDITALY0347 (declaration SEN-01_22)
- Standard
- EN 15804:2012+A2:2019
- Valid until
- 2027-09-29
- Verification
- Third-party verified
Manufactured by Senini in Italy and supplied in the UK by The Hemp Block Company — the EPD is Senini's, not a UK declaration. Declared per m² of wall at 300 mm, not per block or per m³.
Carbon profile
kgCO2e per 1 m² of wall (0.30 m³ of product) · each bar starts at zero · local scale
A1-A3 product
8.08
A4-A5 site*
7.93
B use
-22.2
C end of life
-7.09
D reuse / recycling
0
The use stage is the largest of the modules this EPD declares.
Reported GWP Modules
Displayed as stored; modules are not added together here.
A1–A3
8.08 kgCO₂e
per 1 m² of wall (0.30 m³ of product)
A4*
2.27 kgCO₂e
per 1 m² of wall (0.30 m³ of product)
A5*
5.66 kgCO₂e
per 1 m² of wall (0.30 m³ of product)
B1
-22.2 kgCO₂e
per 1 m² of wall (0.30 m³ of product)
C1
0.372 kgCO₂e
per 1 m² of wall (0.30 m³ of product)
C2
0.711 kgCO₂e
per 1 m² of wall (0.30 m³ of product)
C3
0 kgCO₂e
per 1 m² of wall (0.30 m³ of product)
C4
-8.17 kgCO₂e
per 1 m² of wall (0.30 m³ of product)
D
0 kgCO₂e
per 1 m² of wall (0.30 m³ of product)
Upfront Carbon (A1–A5)*
16 kgCO₂e per 1 m² of wall (0.30 m³ of product)
A1–A3 8.08 + A4 2.27 + A5 5.66 · GWP-total, as declared
Service Life — the B4 Replacement Input
100 years · EPD reference service life
≈1 installation over a 60-year building study period.
Evidence Sources
EPDItaly
Coverage: Blocco Ambiente® 20×50×30 cm hemp-lime block
Comparison Status
This result should be displayed for information only and not ranked against another product.
- • The PCR and version are missing.
- • The carbon result is not linked to an evidence source.
- • The EPD is not linked to an evidence source.
Design & Specification Notes
Qualitative notes for early design discussion. Not product-specific EPD evidence, and not a basis for numerical comparison.
A prefabricated hemp-lime block of hemp shiv bound with hydrated lime, laid as an insulating infill within a structural frame.
Typical Uses
- •Primary frame
- •Long-span elements
- •Load-bearing supports
Key Performance
High load-bearing capacity for primary frame.
Specification Actions
- •Confirm the current EPD covers the selected product, finish and manufacturing route.
- •Calculate transport distances for primary materials.
- •Document material reuse or reclaimed content percentages.
Indicative Health & Indoor Air
- •hydrated lime is alkaline and irritant to skin, eyes and lungs when dry or wet
Specification
- Collection
- Blocco Ambiente®
- Finish
- Prefabricated hemp shiv and hydrated lime block
- Service life
- 100 years