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

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

Bristol·30 packs · ≈90m²·Listed 21d ago
£475/lot
~64kg CO₂e saved

Sold by Bristol Reclaim Co. (Demolition) · Ref L0434

Contact sellerHow buying works

Condition grade 8/10 (Reclaimed). 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 Bristol — collection or arranged regional delivery available. Listed 21 days ago by Bristol Reclaim Co., a demolition based in Bristol.

Every lot here was once destined for waste transfer — listing it instead keeps first-quality material in circulation at well below merchant list. As reclaimed stock it carries genuine history — the full condition report below states exactly what to expect.

Measurements & specifications

Density
45 kg/m³
Thickness
50mm
Location
Bristol
Ref
SB-43-04
Quantity / lot size
30 packs · ≈90m²
Thermal conductivity
λ 0.035 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

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

Carbon & sustainability notes

The 64 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 378 km of driving emissions, or 3 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

  • Collection from the seller's Bristol premises — pallet truck on site; tail-lift vehicles recommended.
  • Seller can quote hiab or flatbed delivery within ~60 miles of Bristol; from £45.
  • 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 3 packs.

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