Clayworks Exterior / Hybrid Exterior Finish
An exterior render for masonry and rendered substrates, applied at 15 mm. Despite the Clayworks name the declared composition is sand and hydraulic lime, not clay — it is a lime render, and it gains carbon back over its life as the lime recarbonates.
Carbon and evidence
Product Evidence
Evidence currently held for the Clayworks product record.
Recorded Carbon Result
A1–A3 GWP-total per m² at 15 mm. The EPD also declares B1 = -1.97 kgCO2e as the lime recarbonates in service, so cradle-to-grave is materially lower than the A1–A3 figure alone suggests.
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 at 15 mm thickness (31.8 kg)
- Programme
- EPD International AB (The International EPD® System)
- Registration
- S-P-03276
- Standard
- EN 15804:2012+A2:2019/AC:2021
- Valid until
- 2028-11-25
- Verification
- Third-party verified
Declared composition per functional unit is 27.67 kg sand and 4.13 kg hydraulic lime — no clay. Catalogued as a lime render rather than a clay product for that reason. The PDF at this URL contains two EPDs: the expired interior clay-plaster declaration first, then this one from p. 18.
Carbon profile
kgCO2e per 1 m² at 15 mm thickness (31.8 kg) · each bar starts at zero · local scale
A1-A3 product
6.09
A4-A5 site*
1.66
B use
-1.97
C end of life
0.745
D reuse / recycling
0
Reported GWP Modules
Displayed as stored; modules are not added together here.
A1–A3
6.09 kgCO₂e
per 1 m² at 15 mm thickness (31.8 kg)
A4*
1.33 kgCO₂e
per 1 m² at 15 mm thickness (31.8 kg)
A5*
0.328 kgCO₂e
per 1 m² at 15 mm thickness (31.8 kg)
B1
-1.97 kgCO₂e
per 1 m² at 15 mm thickness (31.8 kg)
C1
0.0735 kgCO₂e
per 1 m² at 15 mm thickness (31.8 kg)
C2
0.0558 kgCO₂e
per 1 m² at 15 mm thickness (31.8 kg)
C3
0.174 kgCO₂e
per 1 m² at 15 mm thickness (31.8 kg)
C4
0.442 kgCO₂e
per 1 m² at 15 mm thickness (31.8 kg)
D
0 kgCO₂e
per 1 m² at 15 mm thickness (31.8 kg)
Upfront Carbon (A1–A5)*
7.75 kgCO₂e per 1 m² at 15 mm thickness (31.8 kg)
A1–A3 6.09 + A4 1.33 + A5 0.328 · GWP-total, as declared
Service Life — the B4 Replacement Input
60 years · EPD reference service life
The declaration gives the building's life, not the finish's: the reference service life is assumed to be that of the building, defaulted to 60 years.
≈1 installation over a 60-year building study period.
Sourced Product Claims
- Reabsorbs 1.97 kgCO2e/m² in service as the lime recarbonates (B1)Third-party verifiedSource
1 claim is held in the staging record but not presented as product evidence because an exact public source has not yet been mapped.
Evidence Sources
EPD International AB
Coverage: Clayworks Exterior and Hybrid Exterior Finish
Comparison Status
This result should be displayed for information only and not ranked against another product.
- • The carbon result is not linked to an evidence source.
- • The EPD is not linked to an evidence source.
Evidence Gaps
- •1 sustainability claim is 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.
An exterior render for masonry and rendered substrates, applied at 15 mm.
Typical Uses
- •Facade cladding
- •Weather protection
- •External accents
Key Performance
Weather-resistant finish for facade exposure.
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
- •hydraulic lime is alkaline and irritant to skin and eyes when wet
Specification
- Collection
- Clayworks exterior finishes
- Finish
- Hydraulic lime and sand exterior render
- Service life
- 60 years