Rockwool RWA45 50mm slabs (30 packs)
Acoustic mineral wool slabs in 50mm. Stock clearance — packaging slightly creased, product immaculate. Ideal for studwall sound insulation between rooms.
Sold by Glasgow Greenfield Contractors (Contractor) · Ref L0447
Condition grade 10/10 (New surplus). Assessed by the seller at listing; figures below relate to this specific lot of 24 m².
Sealed bales of British sheep's wool. Breathable, low embodied carbon, no itch. Located in Glasgow — collection or arranged regional delivery available. Fresh to market — posted 10 days ago by Glasgow contractor Glasgow Greenfield Contractors.
Surplus stock like this exists because projects over-order to avoid downtime — the saving gets passed to you instead of the skip. As new surplus it is indistinguishable from merchant stock except for the price.
Choosing this lot over new product avoids an estimated 33 kg CO₂e — benchmarked against producing virgin PIR/mineral wool boards (PIR ~3.5 kg CO₂e per m² at 100mm).
For scale: roughly 195 km in a typical petrol car, or a year's absorption for 2 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.
No — what matters is the declared lambda value and installed thickness. Keep a facing photo showing the print line for your Building Regs file.
Flat, dry and off the ground. PIR facings degrade with prolonged UV exposure, so keep the wrap on until the day of fixing.
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 5 packs.
Acoustic mineral wool slabs in 50mm. Stock clearance — packaging slightly creased, product immaculate. Ideal for studwall sound insulation between rooms.
Mixed PIR pieces, all usable. Perfect for stud walls and ceiling bays. Thermally identical to full boards. Located in Glasgow — collection or arranged regional delivery available.
Surplus to a Passivhaus retrofit. Better λ than PIR. Sealed packs, dry stored. Located in Glasgow — collection or arranged regional delivery available.