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

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

Liverpool·~18 m²·Listed 4d ago
£95/lot

Sold by Liverpool Urban Reclamation (Demolition) · Ref L0401

Contact sellerHow buying works

Condition grade 6/10 (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 Liverpool — collection or arranged regional delivery available. Direct from Liverpool Urban Reclamation, a demolition operating out of Liverpool; live for 4 days.

This is exactly the kind of material that typically ends up in a skip costing the seller money; buying it diverts it back into a build. It is graded down on appearance alone; structurally and functionally it performs as A-grade.

Measurements & specifications

Brand
Celotex GA4000
λ-value
0.022 W/mK
Location
Liverpool
Ref
SB-40-07
Quantity / lot size
~18 m²
Thermal conductivity
λ 0.036 W/mK (per facing print)
Board squareness
Checked diagonal-to-diagonal on 5 sample boards
Edge profile
Square edge
Storage
Flat-stacked, dry, off the ground since arrival
Facing condition
Foil/paper facings intact on 98% of boards

Condition report & known defects

6/10
  • Cosmetic seconds — graded down for appearance, not performance.
  • Allow a cutting/waste margin of ~10% over a normal A-grade order.

Carbon & sustainability notes

This listing carries no CO₂-saved figure because the material is new; the sustainability win here is waste prevention — first-quality stock staying out of the waste stream entirely.

Reuse is the single fastest way to cut a build's embodied carbon — substitution beats offsetting every time.

Collection & delivery

  • Buyer collection in Liverpool; pallet truck on site; tail-lift vehicles recommended.
  • Regional pallet delivery can be arranged from £80 depending on postcode and lead time.
  • Inspection before purchase is encouraged — bring a tape and check sample units against the measurements above.

Typical applications

  • Warm roof build-ups and rafter-level insulation
  • Floor insulation under screed or chipboard
  • Dot-and-dab and stud-wall drylining
  • Garage conversions and garden offices

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 8 packs.

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