Stora Enso CLT
Cross-laminated timber (CLT) — a solid engineered wood panel of at least three cross-bonded layers of PEFC/FSC spruce, used for walls, floors and roofs in mass-timber buildings. Strong, prefabricated and dimensionally stable, it stores biogenic carbon so its product-stage footprint is strongly negative.
Carbon and evidence
Product Evidence
Evidence currently held for the Stora Enso product record.
Recorded Carbon Result
A1–A3 GWP-total per m³, incl. biogenic carbon stored in the timber (EN 15804+A2), per EPD
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
- Representative product
- Declared unit
- 1 m³ (470 kg/m³, 12% moisture)
- Programme
- EPD International AB — The International EPD System
- Registration
- S-P-09949
- Standard
- EN 15804+A2
- Valid until
- 2028-10-06
- Verification
- Third-party verified
Third-party verified (International EPD System). Declared per 1 m³; GWP-total A1–A3 is strongly negative because EN 15804+A2 counts the biogenic carbon stored in the timber. C3 (+782) is the incineration end-of-life scenario releasing that stored carbon; D (−268) is the energy-recovery credit.
Carbon profile
kgCO2e per 1 m³ · each bar starts at zero · local scale
A1-A3 product
-708
A4-A5 site*
31.3
B use
0
C end of life
788
D reuse / recycling
-268
Stores more carbon than making it emits — and the stored carbon largely leaves again at end of life.
Reported GWP Modules
Displayed as stored; modules are not added together here.
A1–A3
-708 kgCO₂e
per 1 m³
A4*
25.9 kgCO₂e
per 1 m³
A5*
5.38 kgCO₂e
per 1 m³
B1
0 kgCO₂e
per 1 m³
C1
4.01 kgCO₂e
per 1 m³
C2
2.05 kgCO₂e
per 1 m³
C3
782 kgCO₂e
per 1 m³
C4
0 kgCO₂e
per 1 m³
D
-268 kgCO₂e
per 1 m³
Upfront Carbon (A1–A5)*
-677 kgCO₂e per 1 m³
A1–A3 -708 + A4 25.9 + A5 5.38 · as declared
Service Life — the B4 Replacement Input
50 years · EPD reference service life
≈2 installations over a 60-year building study period.
2 claims and 2 certifications are held in the staging record but not presented as product evidence because an exact public source has not yet been mapped.
Comparison Status
This result should be displayed for information only and not ranked against another product.
- • The PCR and version are missing.
- • The GWP indicator is missing.
- • The carbon result is not linked to an evidence source.
- • The EPD is not linked to an evidence source.
Evidence Gaps
- •2 sustainability claims are withheld because exact public evidence is not mapped.
- •2 certifications are withheld because exact public evidence is not mapped.
Design & Specification Notes
Qualitative notes for early design discussion. Not product-specific EPD evidence, and not a basis for numerical comparison.
Cross-laminated timber (CLT) — a solid engineered wood panel of at least three cross-bonded layers of PEFC/FSC spruce, used for walls, floors and roofs in mass-timber buildings.
Typical Uses
- •Primary frame
- •Long-span elements
- •Load-bearing supports
Key Performance
High load-bearing capacity for primary frame.
Specification Actions
- •Confirm FSC or PEFC certification for all timber products.
- •Request chain-of-custody documentation from supplier.
- •Confirm the current EPD covers the selected product, finish and manufacturing route.
Indicative Health & Indoor Air
Solid timber panel; verify adhesive/formaldehyde class and any surface treatment for exposed interior use.
Specification
- Range
- Cross Laminated Timber
- Collection
- CLT
- Finish
- Cross-laminated timber panel
- Thickness
- 60–400mm
- Width
- up to 3500mm
- Length
- up to 16000mm
- Service life
- 50 years