UK · Updated 2026 · Explainer

Part Z & Embodied Carbon: Using Surplus Reclaimed Engineering Bricks in Belfast

Whole-life carbon assessments are becoming mandatory on Belfast projects. Reclaimed and surplus engineering bricks is the fastest lever for reducing A1–A3 embodied carbon in Northern Ireland. This 2026 guide shows the numbers and the evidence you need.

Embodied carbon savings

Reclaimed engineering bricks typically avoids 60–95% of the A1–A3 embodied carbon of a new equivalent. On a mid-size Belfast project this can equal 4–12 tonnes CO₂e avoided.

Part Z timeline and what it requires

  • Whole-life carbon assessment on all major projects
  • Reporting to a central UK register
  • Alignment with RICS WLCA methodology
  • Evidence of material provenance

Building a compliant evidence pack in Belfast

  • Yard invoice with weight/quantity
  • Photos and batch references
  • Manufacturer EPD comparison for baseline
  • Site delivery notes

Cost of engineering bricks vs carbon benefit

GradeTypical priceNotes
Job-lot / bulk£620 per 1,000Merchant clearance, palletised
Standard graded£1,010 per 1,000Sorted, ready-to-fit stock
Heritage / premium£1,400 per 1,000Character grade, hand-picked

Frequently asked questions

+Is Part Z law yet?

Not yet fully — it's a private-members bill and industry alignment. Adoption on public and BREEAM projects is already widespread.

+How is carbon quantified for surplus?

A1–A3 emissions are usually set to zero for genuine reclaim; A4 (transport) uses actual distance.

+Can I use them for a garden wall?

Yes — they weather beautifully and give a period industrial look.

Related guides

More SurplusBuilder guides