62.5mm SOPRATHERM PL4050 Insulated Plasterboard (previously Celotex) - 50mm PIR Insulation Bonded to 12.5mm Plasterboard - 1200mm x 2400mm (PL4000)

Guide Price
62.5mm SOPRATHERM PL4050 Insulated Plasterboard (previously Celotex) - 50mm PIR Insulation Bonded to 12.5mm Plasterboard - 1200mm x 2400mm (PL4000)
Guide Price: £83.59 (£100.31 inc VAT)
Price per m2: £29.02/m2 (£34.83 inc VAT)
10 or more £82.21 (£98.65 inc VAT)
15 or more £80.83 (£97.00 inc VAT)
20 or more £78.79 (£94.55 inc VAT)
- Product Code: A1-7055
- Delivery Time: 2 - 3 working days
- Brand: Soprema (Tech. support: 03300580668)
- Model: 1200mm x 2400mm - 2.88m2
Our ratings on 27-10-2026:

4.8 out of 5
62.5mm SOPRATHERM PL4050 Insulated Plasterboard (previously Celotex) - 50mm PIR Insulation Bonded to 12.5mm Plasterboard - 1200mm x 2400mm (PL4000)
Length: 2400mm
Width: 1200mm
Thickness: 62.5mm
Board Coverage: 2.88m2
Board Coverage: 2.88m2
Thermal Conductivity: 0.022W/mK
R-Value: 2.3m2K/W
Fire Rating (Reaction to Fire): B(Class 0)
62.5mm SOPRATHERM PL4050 is an insulated plasterboard consists of a high-performance 50mm polyisocyanurate (PIR) insulation board factory-bonded to a 12.5mm tapered-edge gypsum plasterboard. It is designed to be fixed internally to walls and ceilings, providing an immediate thermal upgrade and a surface ready for decoration. This is the insulated plasterboard (laminate) is the fast-track solution for internal drylining and thermal upgrades.
CHARACTERISTICS
- By combining insulation and plasterboard into one sheet, it reduces the number of installation steps. This is particularly beneficial for internal wall insulation projects and loft conversions.
- The plasterboard face has tapered edges, allowing for seamless jointing and skimming. This ensures a smooth, professional finish for painting or wallpapering.
- The foil backing on the PIR insulation, combined with the bonding process, acts as a high-performance vapour control layer. This helps to reduce the risk of interstitial condensation within the wall structure.
- Because PIR has such a low thermal conductivity, you can achieve significant thermal improvements with a relatively thin board, which is vital for maintaining internal room dimensions.
- It is suitable for a variety of installation methods, including dot and dab (adhesive bonding) and mechanical fixing to timber or metal frames.
APPLICATION
- Internal Wall Insulation: Upgrading the thermal performance of solid masonry walls or existing cavity walls from the inside.
- Loft Conversions: Lining the underside of rafters or joists to create insulated living spaces.
- Flat Roofs: Used internally as a warm roof lining or under-deck insulation.
- Refurbishment: A quick way to improve the U-value of older properties during a renovation.
CERTIFICATION
- BBA Certificate - 25/7366 PS1 (UK)
- Soprema operates independently monitored Quality and Environment Assurance Systems in line with EN ISO 9001 and EN ISO 14001.
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