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New surplus surplus insulation & plasterboard — Sheep's wool 100mm natural insulation (24 m²) — SheffieldNew surplus

Sheep's wool 100mm natural insulation (24 m²) — Sheffield

Sheffield·24 m²·Listed 14d ago
£410/lot
~33kg CO₂e saved

Sold by Sheffield Greenfield Contractors (Contractor) · Ref L0451

Contact sellerHow buying works

Condition grade 9/10 (New surplus). Assessed by the seller at listing; figures below relate to this specific lot of 24 m².

About this lot

Sealed bales of British sheep's wool. Breathable, low embodied carbon, no itch. Located in Sheffield — collection or arranged regional delivery available. Offered by Sheffield Greenfield Contractors (contractor) from their Sheffield yard, listed 14 days ago.

Site over-orders, cancelled jobs and careful strip-outs are where the best material bargains in the UK come from — this lot is one of them. This is unused, current-spec material — the only thing second-hand about it is the price tag logic.

Measurements & specifications

Brand
Black Mountain Natuwool
λ-value
0.039 W/mK
Location
Sheffield
Ref
SB-44-09
Quantity / lot size
24 m²
Thermal conductivity
λ 0.030 W/mK (per facing print)
Board squareness
Checked diagonal-to-diagonal on 3 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

9/10
  • Stored under cover since delivery; no weather exposure.
  • Unused stock — original banding/packaging intact where stated.
  • Original wrap opened on one pack for count verification, re-taped.

Carbon & sustainability notes

The 33 kg CO₂e figure on this listing is calculated against producing virgin PIR/mineral wool boards (PIR ~3.5 kg CO₂e per m² at 100mm).

Put another way — about 195 km of driving emissions, or 2 tree-years of carbon uptake.

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

  • Buyer collection in Sheffield; pallet truck on site; tail-lift vehicles recommended.
  • Seller can quote hiab or flatbed delivery within ~30 miles of Sheffield; from £75.
  • Ask the seller for close-up photos or a video walkround if you can't visit — they expect the request.

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 6 packs.

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