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B-grade surplus insulation & plasterboard — Celotex GA4000 100mm offcuts (~18 m²) — CardiffB-grade

Celotex GA4000 100mm offcuts (~18 m²) — Cardiff

Cardiff·~18 m²·Listed 8d ago
£100/lot

Sold by Cardiff Urban Reclamation (Demolition) · Ref L0405

Contact sellerHow buying works

Condition grade 7/10 (B-grade). Assessed by the seller at listing; figures below relate to this specific lot of ~18 m².

About this lot

Mixed PIR pieces, all usable. Perfect for stud walls and ceiling bays. Thermally identical to full boards. Located in Cardiff — collection or arranged regional delivery available. Fresh to market — posted 8 days ago by Cardiff demolition Cardiff Urban Reclamation.

Surplus stock like this exists because projects over-order to avoid downtime — the saving gets passed to you instead of the skip. B-grade pricing reflects cosmetics, not performance — the defect notes below set out exactly what was downgraded and why.

Measurements & specifications

Brand
Celotex GA4000
λ-value
0.022 W/mK
Location
Cardiff
Ref
SB-40-11
Quantity / lot size
~18 m²
Thermal conductivity
λ 0.032 W/mK (per facing print)
Board squareness
Checked diagonal-to-diagonal on 4 sample boards
Edge profile
Tapered edge
Storage
Flat-stacked, dry, off the ground since arrival
Facing condition
Foil/paper facings intact on 98% of boards

Condition report & known defects

7/10
  • Facing scuffs and 4 dented edges per pack; thermal performance unaffected.
  • Each unit inspected and photographed on request before dispatch.

Carbon & sustainability notes

No reuse CO₂ credit is claimed on this lot: it is unused stock, so the embodied carbon was committed at manufacture. Buying it still prevents waste — material sent to landfill or energy recovery delivers none of its embodied value.

With Part Z and embodied-carbon reporting moving up the agenda, documented reuse like this is increasingly worth recording in your project's carbon log.

Collection & delivery

  • Collection from the seller's Cardiff premises — telehandler on site, HGV access fine.
  • Nationwide pallet courier available — typically £60–£115 per pallet, 2–4 working days.
  • Viewings welcomed by appointment; the measurements table above reflects what was checked at listing.

Typical applications

  • Garage conversions and garden offices
  • Acoustic upgrades between floors
  • Warm roof build-ups and rafter-level insulation
  • Floor insulation under screed or chipboard

How to buy, collect and install this lot

  1. 1Confirm your requirement against the measurements above — bring a tape and the ~18 m² figure when you visit Cardiff Urban Reclamation in Cardiff.
  2. 2Reserve the lot in writing with a deposit; get the batch/reference (L0405) and condition grade (7/10) on the receipt.
  3. 3Arrange transport: forklift loading available weekdays 7:30am–4pm. Confirm access at your delivery address (width, overhead clearance, forklift or hand-ball).
  4. 4On arrival, check the count against the ~18 m² stated and photograph any transit damage before signing the delivery note.
  5. 5Store correctly on site — for insulation, that means dry, level and off the ground; keep original packaging on until the day of use where possible.
  6. 6Dry-lay or trial-fit a small sample first to confirm insulation performs as expected in your specific application before committing the whole lot.
  7. 7Log the reuse for your project records: photograph the seller invoice, capture the ~0 kg CO₂e figure and save this listing URL in your embodied-carbon file.

Pre-purchase checklist

  • Measure twice — confirm ~18 m² covers your net requirement plus a 8% waste/cutting allowance.
  • View in person or request a video walkround from Cardiff Urban Reclamation; do not rely on the hero photograph alone.
  • Check condition against the 7/10 grade above — ask which specific defects apply to the units you'll actually receive.
  • Confirm the batch or shade reference (L0405) so what you inspect is what you collect.
  • Agree collection or delivery cost in writing — pallet, hiab, flatbed or hand-ball each price very differently.
  • Verify VAT position: is the £100/lot figure ex-VAT or inclusive? Trade sellers default to ex-VAT.
  • Ask about returns or replacements if the delivered quantity falls short — reputable demolitions stand behind the stated count.
  • Screenshot this listing (title, price, condition, CO₂ figure) as your negotiation baseline — surplus prices drift as lots age.
  • Check compatibility if you're matching existing material (brick blend, tile shade, timber section) with a physical sample first.
  • Book collection or delivery within your reservation window — b-grade lots at this price rarely sit for long.

Price in context

  • At £100/lot, this lot sits roughly 32% below current UK merchant list for equivalent new material — the typical spread for b-grade insulation.
  • Delivered-to-door pricing (including pallet freight within ~57 miles of Cardiff) tends to add £60–£100 to the headline figure; collection stays as advertised.
  • Comparable b-grade lots in the surplus insulation & plasterboard category have moved on SurplusBuilder within 4 days of listing — well-priced surplus doesn't linger.

Sustainability deep-dive

The headline saving on this listing (waste avoidance) is benchmarked against producing virgin PIR/mineral wool boards (PIR ~3.5 kg CO₂e per m² at 100mm). That's the embodied-carbon figure — the emissions locked into new material at the point of manufacture, before it ever reaches your site.

In UK building terms, embodied carbon typically accounts for 40–60% of a project's whole-life emissions once operational energy is decarbonised. Reusing insulation like this lot from Cardiff bypasses the manufacturing stage entirely, which is why substitution consistently outperforms offsetting on lifecycle assessments.

For projects tracking against Part Z (the proposed embodied-carbon amendment to the Building Regulations), BREEAM Mat 01 credits, or the RIBA 2030 Climate Challenge, reused material counts at zero embodied carbon in the A1–A3 modules. Keep the seller invoice, this listing URL and the CO₂e figure together in your carbon file.

Beyond carbon: buying this lot from Cardiff Urban Reclamation keeps first-quality insulation out of the UK construction waste stream (currently ~62 million tonnes/year, per DEFRA). It supports the circular-economy supply chain — sellers who divert stock only continue diverting when there's a viable resale route.

Questions about this lot

Do part-sheets affect building control sign-off?+

No — what matters is the declared lambda value and installed thickness. Keep a facing photo showing the print line for your Building Regs file.

How should boards be stored on site?+

Flat, dry and off the ground. PIR facings degrade with prolonged UV exposure, so keep the wrap on until the day of fixing.

Is mixed-brand insulation OK in one roof?+

Yes, provided each zone's U-value calc uses the correct lambda for the board actually installed there. This lot is single-brand across all 5 packs.

What payment and paperwork should I expect from Cardiff Urban Reclamation?+

Cardiff Urban Reclamation issues a VAT invoice on collection or dispatch — bank transfer is standard, card on request. For anything over £500 we recommend a written spec confirmation before paying, so the exact insulation description and quantity are on record.

Can I reserve this lot while I organise transport from Cardiff?+

A short reservation (typically 48–72 hours) is usually possible with a 10% holding deposit. Surplus stock moves quickly, especially b-grade lots at this price point — confirm the hold in writing so the seller doesn't re-list.

Is this suitable for a Part L / Part Z reporting project?+

The material itself carries the same certifications as merchant stock; document the reuse route in your carbon log even without a specific CO₂e figure — waste avoidance still counts under Part Z reporting guidance.

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