52.5mm Unilin Safe-R SR/TB Phenolic Insulated Plasterboard combines a high-performance 40mm phenolic insulation layer with glass tissue facing, bonded to 12.5mm tapered edge plasterboard using specialist adhesive. Designed for internal wall applications, this composite panel delivers both thermal insulation and drylining in one efficient solution.
The 52.5mm Unilin SR/TB offers outstanding thermal insulation performance alongside professional drylining capabilities, making it an excellent choice for new builds and refurbishment projects alike. Investing in energy-efficient solutions helps reduce heating costs and creates a more comfortable living environment throughout your property.
Brand: Unilin
Model: 52.5mm SR/TB Phenolic Insulated Plasterboard
Thickness: 52.5mm
Dimensions: 2,400mm x 1,200mm x 52.50mm
Width: 1200mm
Length: 2400mm
Board Coverage: 2.88m2
Pack Coverage: 20.16m2
Pack Quantity: 7
Material: Phenolic core ǀ Gypsum plasterboard
R-Value: 1.74m2K/W
Thermal Conductivity: 0.020 – 0.021 – (0.023 Below 40mm) (W/mK) Phenolic only
Finish: Composite kraft facing
Inner facing: Kraft facing
Outer facing: Foil facing
Shipping method: Articulated Vehicle ǀ Courier
Applications: Internal Walls ǀ Roofs
BBA Certified: Yes (no. 10/4803)
Vapour Control Layer: Yes, build in
Reaction to fire: Euroclass B s1 d0
Fixing method: Adhesive bonding
Decoration: Skim plaster
ETA Notification: Yes
Features: Integral vapour barrier thermal-liner
The composite glass tissue facing on SR/TB acts as a gas and vapour barrier, significantly reducing condensation risk. When joints are properly sealed and taped following standard drylining practices, a complete vapour control layer is created across the wall surface.
When drylining walls, fire stops must be installed at the top and bottom of each board and around all openings including doors and windows. These consist of continuous lines of adhesive that prevent fire spread behind the insulation. The unbroken adhesive lines also help eliminate thermal bridging, improving overall wall U-Values.
PIR insulation boards must be stored on a clean, level surface above ground and protected from weather exposure. Polythene wrapping alone does not provide adequate outdoor protection. Take care to protect boards during storage and throughout construction. Always wear appropriate personal protective equipment (PPE) when handling insulation materials.
Browse our full Unilin range and filter by thickness or coverage using the left-hand menu. For product suitability advice or bulk quotations, contact us on +4402038839057, email sales@insulationbee or use Live Chat for competitive Insulation board pricing across the UK.










