UK · Updated 2026 · How-to
Surplus PIR Insulation for Energy Retrofit in Bath: 2026 Sourcing Guide
Bath retrofits — from PAS 2035 refurbs to EnerPHit self-builds — rely on high-spec materials at cost. Surplus and clearance stock delivers the same certified spec at 40–60% less. Here's the 2026 sourcing map for South West.
Retrofit-relevant PIR insulation sources
- Merchant clearance on certified stock
- Manufacturer over-orders (PIR, mineral wool, plasterboard)
- Cancelled project surplus in your postcode
- Regional trade Facebook groups
Certification you must preserve
- BBA certificate on insulation and boards
- Batch/lot number for U-value calculations
- Fire rating on partition materials
- Datasheets for PAS 2035 evidence packs
2026 Bath pricing
| Grade | Typical price | Notes |
|---|---|---|
| Job-lot / bulk | £8.00 per m² | Merchant clearance, palletised |
| Standard graded | £18.00 per m² | Sorted, ready-to-fit stock |
| Heritage / premium | £28 per m² | Character grade, hand-picked |
Collection and delivery inside Bath
Most Bath sellers hold stock inside BA1, BA2 and BA15 and offer South West next-day £55–£95. For loads over a tonne of PIR insulation, a hiab drop is usually more economical than multiple van runs.
Embodied carbon: Surplus PIR Insulation in Bath vs new
Choosing surplus or reclaimed PIR insulation in Bath avoids the A1–A3 manufacturing emissions of newly produced stock. On a typical Bath project this equates to roughly 1–2 kgCO₂e per m² — material evidence under Part Z, RICS WLCA and BREEAM Mat 06.
South West local authorities increasingly request whole-life carbon evidence on planning submissions above 1,000 m². Keeping the yard invoice, batch photos and a provenance note against every PIR insulation purchase inside BA1, BA2 and BA15 builds an audit trail that stands up to WLCA review.
- A1–A3 avoided: ~1–2 kgCO₂e per m²
- A4 (transport): actual mileage from the Bath yard to site
- A5 (installation): identical to new — labour and fixings unchanged
- Circularity indicator: 1.0 for reclaimed, 0.7–0.9 for surplus new
Expert tips from South West trades
- Buy the whole pallet even if you only need 80% — you'll offload the rest on SurplusBuilder inside 14 days at 60–80% of what you paid.
- Book a Friday collection slot: Bath yards are quieter and forklift drivers have time, so you avoid the BA1, BA2 and BA15 weekday delivery crush.
- Ask for the yard's "just arrived" list — the best PIR insulation moves before it hits public listings.
- Photograph everything on the vehicle before you leave — protects both parties if a defect surfaces on unloading.
VAT, warranty and paperwork in Bath
Reclaimed materials from private sellers are typically zero-rated for VAT. Surplus stock from VAT-registered South West merchants carries standard 20% VAT — confirm before agreeing a price. Factory-fresh surplus retains its original manufacturer warranty when unregistered and stored correctly; keep the batch label and any BBA certificate alongside the invoice.
- Get a VAT invoice for surplus buys over £250 — it's deductible for trade
- Retain BBA / BS EN test certificates with the delivery note
- Photograph batch numbers on PIR insulation packaging for retrofit and Part L evidence
- Log the Bath postcode of the source yard against the project record
Frequently asked questions
+Does surplus PIR insulation count for PAS 2035?
Yes when spec and certification are preserved. Keep batch numbers and BBA certificates with your evidence pack.
+How long can PIR be stored?
Indefinitely in original wrapping, out of direct sun.
+Can I use surplus on ECO4-funded work?
Yes — ECO4 assessors care about spec and installation quality, not new-vs-surplus provenance.
+Is surplus PIR insulation covered by manufacturer warranty in Bath?
Yes for factory-fresh over-orders and cancelled-order stock. The warranty runs from date of manufacture (batch label) rather than date of purchase — check the batch date before committing on large South West orders.
+Can I count reclaimed PIR insulation towards BREEAM Mat 06?
Yes — reclaimed materials attract full circularity credits under BREEAM Mat 06 and RICS WLCA. Keep provenance photos, yard invoice and transport mileage from Bath as evidence.
+What insurance sits behind a SurplusBuilder deal in South West?
Verified sellers carry public liability and product-liability cover. Pallet-network deliveries insure to £1,300/pallet by default; declare higher values for premium PIR insulation loads.