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B-grade surplus insulation & plasterboard — Surplus Kingspan K7 80mm phenolic (40 boards · 2.4×1.2m) — LeedsB-grade

Surplus Kingspan K7 80mm phenolic (40 boards · 2.4×1.2m) — Leeds

Leeds·40 boards · 2.4×1.2m·Listed 16d ago
£1,380/lot

Sold by Leeds Urban Reclamation (Demolition) · Ref L0409

Contact sellerHow buying works

Condition grade 7/10 (B-grade). Assessed by the seller at listing; figures below relate to this specific lot of 40 boards · 2.4×1.2m.

About this lot

Surplus to a Passivhaus retrofit. Better λ than PIR. Sealed packs, dry stored. Located in Leeds — collection or arranged regional delivery available. Listed 16 days ago by Leeds Urban Reclamation, a demolition based in Leeds.

Every lot here was once destined for waste transfer — listing it instead keeps first-quality material in circulation at well below merchant list. B-grade pricing reflects cosmetics, not performance — the defect notes below set out exactly what was downgraded and why.

Measurements & specifications

Brand
Kingspan Kooltherm K7
λ-value
0.018 W/mK
Location
Leeds
Ref
SB-41-03
Quantity / lot size
40 boards · 2.4×1.2m
Thermal conductivity
λ 0.034 W/mK (per facing print)
Board squareness
Checked diagonal-to-diagonal on 6 sample boards
Edge profile
Tongue & groove
Storage
Flat-stacked, dry, off the ground since arrival
Facing condition
Foil/paper facings intact on 94% of boards

Condition report & known defects

7/10
  • Each unit inspected and photographed on request before dispatch.
  • Facing scuffs and 2 dented edges per pack; thermal performance unaffected.

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.

If your project tracks embodied carbon (BREEAM, Part Z readiness, or client ESG reporting), keep this listing reference as evidence of avoided emissions.

Collection & delivery

  • Collection from the seller's Leeds premises — forklift loading available weekdays 7:30am–4pm.
  • Seller can quote hiab or flatbed delivery within ~60 miles of Leeds; from £35.
  • Ask the seller for close-up photos or a video walkround if you can't visit — they expect the request.

Typical applications

  • Floor insulation under screed or chipboard
  • Dot-and-dab and stud-wall drylining
  • Garage conversions and garden offices
  • Acoustic upgrades between floors

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 7 packs.

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