UK · Updated 2026 · Explainer
Part Z & Embodied Carbon: Using Surplus Reclaimed Internal Doors in Liverpool
Whole-life carbon assessments are becoming mandatory on Liverpool projects. Reclaimed and surplus doors is the fastest lever for reducing A1–A3 embodied carbon in North West. This 2026 guide shows the numbers and the evidence you need.
Embodied carbon savings
Reclaimed doors typically avoids 60–95% of the A1–A3 embodied carbon of a new equivalent. On a mid-size Liverpool 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 Liverpool
- Yard invoice with weight/quantity
- Photos and batch references
- Manufacturer EPD comparison for baseline
- Site delivery notes
Cost of doors vs carbon benefit
| Grade | Typical price | Notes |
|---|---|---|
| Job-lot / bulk | £35 per door | Merchant clearance, palletised |
| Standard graded | £178 per door | Sorted, ready-to-fit stock |
| Heritage / premium | £320 per door | Character 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.
+Do reclaimed doors need fire-rating for HMOs?
They can be upgraded to FD30 with intumescent paint and strip retrofits.
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