52.5 PIR Insulated Plasterboard Tapered Edge 2400 x 1200 ( 8″ x 4″ )

Minster 52.5 PIR Insulated Plasterboard Tapered Edge 2400 x 1200 (8″ x 4″) is a high-performance thermal laminate board that combines a 40mm rigid polyisocyanurate (PIR) insulation core with a 12.5mm tapered edge gypsum plasterboard in a single composite panel. Designed for trade professionals and DIY builders alike, it delivers insulation and dry lining in one operation — cutting labour time and meeting current Part L building regulation requirements for thermal efficiency.

Key Features and Specifications

• Overall thickness: 52.5mm (40mm PIR core + 12.5mm plasterboard)
• Dimensions: 2400mm x 1200mm (8ft x 4ft)
• Edge profile: Tapered edge — ready for seamless jointing and skimming
• PIR insulation thermal conductivity: 0.022 W/mK
• Composite kraft facing: Integral vapour control layer on the insulation face, reducing the risk of interstitial condensation
• Installation methods: Dot-and-dab adhesive bonding or mechanical fixing to timber battens or masonry
• Compliant with: Part L of the Building Regulations (England & Wales)
• Zero ODP blowing agents; low global warming potential (GWP <5)
• Board weight: Approximately 24–25 kg per board
• Supplied by: Minster (STARK Building Materials UK Limited)

Applications

• Internal wall insulation and dry lining on solid masonry or brick walls
• Timber stud wall lining in new-build and refurbishment projects
• Pitched roof and room-in-the-roof insulation (under-rafter lining)
• Cold flat roof insulation upgrades
• Window reveal build-ups and thermal bridge reduction
• Renovation and retrofit projects requiring compliance with current energy efficiency standards

Why Choose This Product

The 52.5 PIR Insulated Plasterboard from Minster delivers a genuine 2-in-1 solution: insulate and dry-line in a single fix, significantly reducing installation time on site. The 0.022 W/mK PIR core outperforms standard EPS-backed boards, achieving superior U-values at a slimmer overall thickness — ideal where wall depth is limited. The tapered edge profile ensures clean, professional joints with no additional beading required. Sourced through Minster (STARK Building Materials UK Limited), one of the UK’s leading builders’ merchants, you benefit from consistent product quality, reliable stock availability, and competitive trade pricing.

Delivery in and Around London

Minster supplies the 52.5 PIR Insulated Plasterboard Tapered Edge 2400 x 1200 to trade and retail customers across London and the South East. We deliver to inner London boroughs including Croydon, Lewisham, Southwark, Camden, and Hackney, as well as Greater London areas such as Enfield, Bexley, Redbridge, and Barnet. Deliveries also extend to the surrounding counties of Kent, Essex, Surrey, and Hertfordshire. Trade quantities and pallet orders are welcome — contact our team for bulk pricing and scheduled site deliveries.