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Reclaimed surplus insulation & plasterboard — Celotex GA4000 100mm offcuts (~18 m²) — LondonReclaimed Job lot

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

London·~18 m²·Listed 25d ago
£90/lot
~60kg CO₂e saved

Sold by London Reclaim Co. (Demolition) · Ref L0394

Contact sellerHow buying works

Condition grade 8/10 (Reclaimed). 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 London — collection or arranged regional delivery available. Fresh to market — posted 25 days ago by London demolition London Reclaim Co..

Surplus stock like this exists because projects over-order to avoid downtime — the saving gets passed to you instead of the skip. As reclaimed stock it carries genuine history — the full condition report below states exactly what to expect.

Measurements & specifications

Brand
Celotex GA4000
λ-value
0.022 W/mK
Location
London
Ref
SB-40-00
Quantity / lot size
~18 m²
Thermal conductivity
λ 0.031 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 99% of boards

Condition report & known defects

8/10
  • Sold as carefully de-nailed strip-out stock — verify facings before airtightness-critical use.
  • Minor handling marks from salvage and palletising; nothing affecting use.

Carbon & sustainability notes

Choosing this lot over new product avoids an estimated 60 kg CO₂e — benchmarked against producing virgin PIR/mineral wool boards (PIR ~3.5 kg CO₂e per m² at 100mm).

For scale: roughly 354 km in a typical petrol car, or a year's absorption for 3 established trees.

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 London premises — car/van accessible, assistance with loading provided.
  • 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

  • Acoustic upgrades between floors
  • Warm roof build-ups and rafter-level insulation
  • Floor insulation under screed or chipboard
  • Dot-and-dab and stud-wall drylining

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.

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