Carbon and evidence

Product Evidence

Generic material record — no manufacturer product attached.

AI-estimated material

Evidence Base

Category estimate

No product evidence is attached to this generic material, so nothing on this card is numerical. The guidance below is qualitative — an AI-assisted category profile — for early design discussion, not for figures.

Next step: request a current product EPD or manufacturer carbon declaration, or swap in a branded product that holds one.

What's missing (3)

•No current product EPD is recorded.
•No quantified carbon result is recorded.
•No product-specific circularity or material-health claims are recorded.

Service Life — the B4 Replacement Input

50 years · basis not recorded

≈2 installations over a 60-year building study period.

B4 (replacement) follows the building, not the product: an assessor multiplies replacement cycles by project quantities. This record supplies the service life and does not compute B4.

Design & Specification Notes

Loose gravel surface for paths and landscaping; permeable and natural drainage.

Typical Uses

•Paths & paving
•Public realm surfaces
•Permeable groundworks

Key Performance

Durable external surface with slip resistance.

Specification Actions

•Provide origin and responsible-sourcing evidence (reclaimed/local preferred where possible).
•Verify local sourcing to reduce transport
•Confirm edging system to contain gravel

Indicative Health & Indoor Air

low Risk

Natural inert material. External use means no indoor air quality impact.

Evidence:No evidence held

Products in this category

4 products from 2 manufacturers · 12 in this category. Ordered by the evidence each record holds, never by commercial standing.

Specification

Finish: Loose gravel or aggregate
Service life: 50 years