52.5mm Celotex PL4040 Insulated Plasterboard

52.5mm Celotex PL4000 insulated plasterboard combines a polyisocyanurate (40mm PIR) core with paper facing and a 12.5mm tapered edge plasterboard layer. This integrated product suits roof and internal wall lining applications across multiple thicknesses from 15mm to 65mm.

Standard 1200 x 2400mm boards feature paper facing, achieve BRE Green Guide A+ rating, and carry BBA approval (certificate 16/5357) for Plasterboard Thermal Laminate. Fire classification meets Euroclass B-s1, d0 per BS EN 13501-1.

Properties

Brand: 52.5mm Celotex PL4040

Thickness: 52.5mm overall (40mm pir insulation bonded to 12.5mm plasterboard)

Dimensions: 2,400mm x 1,200mm x 52.5 mm

Compressive Strength: 120 kPa

Density: 26 - 36 kg/m³

Length: 2400mm

Width: 1200mm

Material: PIR core ǀ Tapered edge wallboard

R-Value: 1.85 m2K/W

Thermal Conductivity: 0.022W/mK

Vapour Resistivity: 100 MNs/gm

Fire Rating (Reaction to Fire): B(Class 0)

Finish: Kraft paper facings

Applications: Wall linings ǀ Pitched and flat roofs

Vapour Control Layer: Yes, build in

Fixing method: Adhesive bonding ǀ Mechanical fixing

Features: Multi-purpose Insulated Plasterboard

Product Benefits

This 52.5mm Celotex PL4000 delivers superior thermal performance with 0.022 W/m.K conductivity, minimising insulation depth needed for target U-values. The 2-in-1 design merges insulation and plasterboard, streamlining installation for wall and roof dry lining. Rigid construction ensures straightforward transport, handling, and fitting. The Celotex 52.5mm PL4000 holds BBA certification for plasterboard thermal laminate use when installed and maintained per certificate requirements.

Applications

This 52.5mm insulation board delivers integrated thermal insulation and plasterboard for diverse projects. Suitable applications include under-rafter and under-joist layers, solid masonry walls, and timber frame lining.

1. Roofs - Pitched Roof Insulation - Between and Under Rafters
2. Roofs - Flat Roof Insulation - Balconies and Terraces
3. Roofs - Flat Roof Insulation - Between and Under Joists
4. Walls - External Wall Insulation - Upgrading Cavity Walls
5. Walls - External Wall Insulation - Timber Frame Walls
6. Walls - External Wall Insulation - Solid Walls

Time Saving

This product merges insulation and plasterboard into one solution, enabling simultaneous insulation and dry lining of walls or roofs in a single application.

Sustainability

The A+ BRE Green Guide rating demonstrates environmental credentials, supporting BREEAM assessment performance.

About

Celotex PL4040 is a 40mm PIR insulation board with paper facing, laminated to 12.5mm plasterboard. This product provides an efficient combined solution for insulating and dry lining applications. Its excellent thermal performance reduces the insulation depth required to meet target U-values.

The 52.5mm insulated plasterboard works across under-rafter and under-joist layers, solid masonry walls, and timber frame lining. Its rigid structure simplifies transport, handling, and installation.

Info

Browse our Celotex range and filter by thickness or coverage on the left. For project suitability advice or bulk quotations, contact us on +4402038839057, email sales@insulationbee, or use Live Chat - Lowest UK Insulation Prices.