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

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

Newcastle·30 packs · ≈90m²·Listed 25d ago
£495/lot
~68kg CO₂e saved

Sold by Newcastle Reclaim Co. (Demolition) · Ref L0438

Contact sellerHow buying works

Condition grade 7/10 (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 Newcastle — collection or arranged regional delivery available. Direct from Newcastle Reclaim Co., a demolition operating out of Newcastle; live for 25 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 sold as reclaimed: character included, surprises excluded — read the defect notes below before bidding your time.

Measurements & specifications

Density
45 kg/m³
Thickness
50mm
Location
Newcastle
Ref
SB-43-08
Quantity / lot size
30 packs · ≈90m²
Thermal conductivity
λ 0.024 W/mK (per facing print)
Board squareness
Checked diagonal-to-diagonal on 7 sample boards
Edge profile
Tapered edge
Storage
Flat-stacked, dry, off the ground since arrival
Facing condition
Foil/paper facings intact on 95% of boards

Condition report & known defects

7/10
  • Surface weathering consistent with age — structurally sound throughout.
  • Expect natural variation in tone and texture across the batch — this is the appeal of reclaimed stock.

Carbon & sustainability notes

Choosing this lot over new product avoids an estimated 68 kg CO₂e — benchmarked against producing virgin PIR/mineral wool boards (PIR ~3.5 kg CO₂e per m² at 100mm).

For scale: roughly 401 km in a typical petrol car, or a year's absorption for 3 established trees.

With Part Z and embodied-carbon reporting moving up the agenda, documented reuse like this is increasingly worth recording in your project's carbon log.

Collection & delivery

  • Buyer collection in Newcastle; telehandler on site, HGV access fine.
  • Nationwide pallet courier available — typically £70–£110 per pallet, 2–4 working days.
  • Viewings welcomed by appointment; the measurements table above reflects what was checked at listing.

Typical applications

  • Garage conversions and garden offices
  • Acoustic upgrades between floors
  • Warm roof build-ups and rafter-level insulation
  • Floor insulation under screed or chipboard

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 4 packs.

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