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 L0471
Condition grade 9/10 (New surplus). Assessed by the seller at listing; figures below relate to this specific lot of 60 boards.
Brand new, banded. Suits floors, walls and warm roof construction. Located in Glasgow — collection or arranged regional delivery available. Direct from Glasgow Greenfield Contractors, a contractor operating out of Glasgow; live for 14 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. This is unused, current-spec material — the only thing second-hand about it is the price tag logic.
Choosing this lot over new product avoids an estimated 46 kg CO₂e — benchmarked against producing virgin PIR/mineral wool boards (PIR ~3.5 kg CO₂e per m² at 100mm).
For scale: roughly 271 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 8 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.