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New surplus surplus insulation & plasterboard — Rockwool RWA45 50mm slabs (30 packs · ≈90m²) — SheffieldNew surplus Job lot

Rockwool RWA45 50mm slabs (30 packs · ≈90m²) — Sheffield

Sheffield·30 packs · ≈90m²·Listed 26d ago
£500/lot

Sold by Sheffield Greenfield Contractors (Contractor) · Ref L0439

Contact sellerHow buying works

Condition grade 10/10 (New surplus). Assessed by the seller at listing; figures below relate to this specific lot of 30 packs · ≈90m².

About this lot

Acoustic mineral wool slabs. Packaging slightly creased, product immaculate. Ideal for studwall sound insulation. Located in Sheffield — collection or arranged regional delivery available. Listed 26 days ago by Sheffield Greenfield Contractors, a contractor based in Sheffield.

Every lot here was once destined for waste transfer — listing it instead keeps first-quality material in circulation at well below merchant list. As new surplus it is indistinguishable from merchant stock except for the price.

Measurements & specifications

Density
45 kg/m³
Thickness
50mm
Location
Sheffield
Ref
SB-43-09
Quantity / lot size
30 packs · ≈90m²
Thermal conductivity
λ 0.022 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 98% of boards

Condition report & known defects

10/10
  • Minor pallet-edge scuffs to outer packaging only.
  • 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

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 Sheffield premises — forklift loading available weekdays 7:30am–4pm.
  • Seller can quote hiab or flatbed delivery within ~60 miles of Sheffield; from £60.
  • 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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