Heavy 3
The heavy-gauge Spanish slate — 7.5 mm and nearly 57 kg/m², against 5 mm and 37 for CUPA 12 — specified where exposure, span or a conservation officer calls for a thicker slate. The extra mass costs about 19% more carbon per m² to make and 63% more to ship, which is the honest trade for the durability and the heavier shadow line.
Carbon and evidence
Product Evidence
Evidence currently held for the CUPA PIZARRAS product record.
Recorded Carbon Result
A1–A3 GWP-total per m² of finished roof at 56.96 kg/m², over the declaration’s 75-year study period. Delivery is declared separately at 3.23 kgCO2e/m² (649 km by road and 1,209 km by sea) — for a material this heavy the quarry’s location matters as much as its process.
Indicator: GWP-total
Heavy 3 natural slate (BREG EN EPD 000246 (Issue 02))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 56.96 kg/m², 75-year study period
- Programme
- BRE Global (BRE Global Scheme Document SD207)
- Registration
- BREG EN EPD 000246 (Issue 02)
- Standard
- EN 15804:2012+A2:2019, ISO 14025
- Valid until
- 2031-02-19
- Verification
- Third-party verified
Quarried at Solana de Forcadas quarry, San Pedro de Trones, León, Spain. Formats 350×200, 400×200, 400×250, 500×250 and 500×300 mm, 7.5 mm thick. The quarry co-produces, and 56% of the quarry impact is allocated to Heavy 3 by mass.
Carbon profile
kgCO2e per 1 m² of roof · each bar starts at zero · local scale
A1-A3 product
7.39
A4-A5 site*
4.05
B use
0
C end of life
0.245
D reuse / recycling
-0.793
Reported GWP Modules
Displayed as stored; modules are not added together here.
A1–A3
7.39 kgCO₂e
per 1 m² of roof
A4*
3.23 kgCO₂e
per 1 m² of roof
A5*
0.819 kgCO₂e
per 1 m² of roof
B1
0 kgCO₂e
per 1 m² of roof
C1
0 kgCO₂e
per 1 m² of roof
C2
0.226 kgCO₂e
per 1 m² of roof
C3
0.0103 kgCO₂e
per 1 m² of roof
C4
0.00884 kgCO₂e
per 1 m² of roof
D
-0.793 kgCO₂e
per 1 m² of roof
Upfront Carbon (A1–A5)*
11.4 kgCO₂e per 1 m² of roof
A1–A3 7.39 + A4 3.23 + A5 0.819 · GWP-total, as declared
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 heavy-gauge Spanish slate — 7.
Typical Uses
- •Roof coverings
- •Waterproofing layer
- •Weather protection
Key Performance
High durability in wet exposure and wind uplift.
Typical Service-Life Estimate
100 yearsGeneric estimate for early design discussion; confirm with the manufacturer.
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
Specification
- Range
- Heavy 3
- Finish
- Natural roofing slate, 7.5 mm
- Thickness
- 7.5 mm
- Country of manufacture
- Spain