Lignacrete 7.3N Solid
The dense structural block — heavier than their facing blocks at 187 kg/m² of wall, and lower carbon than most of them at 15.7 kgCO₂e/m². Weight and carbon do not track each other in this range: what drives the figure is how much cement and manufactured aggregate the mix needs, not how much the block weighs.
Carbon and evidence
Product Evidence
Evidence currently held for the Lignacite product record.
Recorded Carbon Result
A1–A3 GWP-total per m² of 100 mm wall (187.19 kg). Essentially all fossil; this block holds no meaningful biogenic carbon. Carbonation adds a further declared -0.719 in use (B1).
Indicator: GWP-total
Lignacrete 7.3N Solid (HUB-0149)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 100 mm block wall, 187.19 kg
- Programme
- EPD Hub
- Registration
- HUB-0149
- Standard
- EN 15804:2012+A2:2019, ISO 14025, ISO 21930
- Valid until
- 2027-10-07
- Verification
- Third-party verified
Lignacrete 7.3N Solid, 7.3 N/mm², 100 mm. Declared per square metre of wall, so it is directly comparable with Lignacite’s other blocks.
Carbon profile
kgCO2e per 1 m² of 100 mm wall · each bar starts at zero · local scale
A1-A3 product
15.7
A4-A5 site*
1.54
B use
-0.719
C end of life
2.3
D reuse / recycling
-1.22
Reported GWP Modules
Displayed as stored; modules are not added together here.
A1–A3
15.7 kgCO₂e
per 1 m² of 100 mm wall
A4*
1.52 kgCO₂e
per 1 m² of 100 mm wall
A5*
0.0243 kgCO₂e
per 1 m² of 100 mm wall
B1
-0.719 kgCO₂e
per 1 m² of 100 mm wall
C1
0.62 kgCO₂e
per 1 m² of 100 mm wall
C2
0.879 kgCO₂e
per 1 m² of 100 mm wall
C3
0.602 kgCO₂e
per 1 m² of 100 mm wall
C4
0.197 kgCO₂e
per 1 m² of 100 mm wall
D
-1.22 kgCO₂e
per 1 m² of 100 mm wall
Upfront Carbon (A1–A5)*
17.2 kgCO₂e per 1 m² of 100 mm wall
A1–A3 15.7 + A4 1.52 + A5 0.0243 · GWP-total, as declared
Service Life — the B4 Replacement Input
100 years · EPD reference service life
The declaration states a 100-year reference service life.
≈1 installation over a 60-year building study period.
Evidence Sources
Comparison Status
This result should be displayed for information only and not ranked against another product.
- • 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.
The dense structural block — heavier than their facing blocks at 187 kg/m² of wall, and lower carbon than most of them at 15.
Typical Uses
- •Primary frame
- •Long-span elements
- •Load-bearing supports
Key Performance
High load-bearing capacity for primary frame.
Specification Actions
- •Specify GGBS/PFA cement replacement (target: 50%+ replacement).
- •Request EPD showing embodied carbon per m3.
- •Calculate transport distances for primary materials.
Indicative Health & Indoor Air
Specification
- Range
- Lignacrete
- Finish
- Dense solid concrete block, 100 mm
- Thickness
- 100 mm
- Service life
- 100 years
- Country of manufacture
- United Kingdom