Fibo 850 3.6N
The lightweight block, at 103 kg/m² little more than half the weight of the dense blocks — and the highest carbon in the range at 39.8 kgCO₂e/m². That is not a contradiction: lightweight aggregate is expanded in a kiln, so the weight comes out of the block and goes into the firing. It is specified for handling, thermal performance and reduced structural load, all of which are good reasons — but on carbon it is the most expensive block Lignacite make.
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 (103.32 kg). Essentially all fossil; this block holds no meaningful biogenic carbon. Carbonation adds a further declared -0.708 in use (B1).
Indicator: GWP-total
Fibo 850 3.6N (HUB-0146)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, 103.32 kg
- Programme
- EPD Hub
- Registration
- HUB-0146
- Standard
- EN 15804:2012+A2:2019, ISO 14025, ISO 21930
- Valid until
- 2027-10-07
- Verification
- Third-party verified
Fibo 850 3.6N, 3.6 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
39.8
A4-A5 site*
0.866
B use
-0.708
C end of life
1.27
D reuse / recycling
-0.679
Reported GWP Modules
Displayed as stored; modules are not added together here.
A1–A3
39.8 kgCO₂e
per 1 m² of 100 mm wall
A4*
0.842 kgCO₂e
per 1 m² of 100 mm wall
A5*
0.0243 kgCO₂e
per 1 m² of 100 mm wall
B1
-0.708 kgCO₂e
per 1 m² of 100 mm wall
C1
0.342 kgCO₂e
per 1 m² of 100 mm wall
C2
0.484 kgCO₂e
per 1 m² of 100 mm wall
C3
0.332 kgCO₂e
per 1 m² of 100 mm wall
C4
0.109 kgCO₂e
per 1 m² of 100 mm wall
D
-0.679 kgCO₂e
per 1 m² of 100 mm wall
Upfront Carbon (A1–A5)*
40.7 kgCO₂e per 1 m² of 100 mm wall
A1–A3 39.8 + A4 0.842 + 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.
Sourced Product Claims
Evidence Sources
EPD Hub
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 lightweight block, at 103 kg/m² little more than half the weight of the dense blocks — and the highest carbon in the range at 39.
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
- Fibo
- Finish
- Lightweight expanded-clay aggregate block, 100 mm
- Thickness
- 100 mm
- Service life
- 100 years
- Country of manufacture
- United Kingdom