42.5mm Eco-Liner Insulated Plasterboard combines insulation and wall finish in a single product, engineered for both mechanically fixed and adhesively bonded drylining applications. The integrated insulation layer delivers exceptional thermal performance with a conductivity rating of 0.022 W/mK, making it an efficient choice for upgrading internal walls and pitched roofs simultaneously.
Model: 42.5mm EcoTherm Eco-Liner
Thickness: 42.5mm
Pack Quantity: 1 sheet
Dimensions: 2,400mm x 1,200mm x 42.5mm ( 30mm PIR bonded to 12.5mm Plasterboard)
Length: 2400mm
Width: 1200mm
Weight : Eco-Liner has an approximate weight of 10.76 kg/m2 at a thickness of 82.5 mm (insulation thickness 70 mm plus 12.5 mm plasterboard)
Compressive Strength: >>140kPa
Material: Eco-Liner is a high performance rigid thermoset polyisocyanurate PIR insulation.
Thermal Conductivity: Insulation: 0.022 W/mK & Plasterboard: 0.19 W/mK
Thermal Resistance: 1.42 m2K/W
Core Density: 28kg/m3
Fire Classification: European Classification (Euroclass) B-s1,d0 when classified to EN 13501-1: 2018.
Coverage: 2.88m2
Surface: Composite kraft paper facing adhered to 12.5mm or 9.5mm*plasterboard
Facing: 42.5mm Ecotherm has a bilaminate foil/kraft paper facing on the outer, bonded to a 12.5 mm tapered edge gypsum plasterboard on the inner facing.
Finish: Kraft facing ǀ Composite foil
Core water vapour resistivity: 2743 x 1200
Edge: Butt
Fire Performance: BS 476-7 / Class 1
Application: Eco-Liner 42.5mm insulated plasterboard is internal wall insulation for solid, cavity or timber frame walls within new and existing properties. Eco-Liner is also an ideal insulation product for pitched roofs.
Key advantages of Eco-Liner include its integrated 2-in-1 system combining insulation and drylining in a single installation step, a high-performance rigid polyisocyanurate 30mm PIR insulation Board core paired with a tapered edge 12.5mm gypsum plasterboard, versatility across room-in-the-roof applications, wall installations, and cold flat roofs, and outstanding thermal efficiency with a low conductivity value of 0.022 W/mK.
42.5mm Ecotherm achieves a European Classification (Euroclass) rating of B-s1,d0 in accordance with EN 13501-1:2018, the standard governing fire classification of construction products and building elements based on reaction to fire testing.
The thermal conductivity (lambda/λ - value) of the 42.5mm insulation core is 0.022 W/mK, whilst the 12.5 mm gypsum plasterboard component has a thermal conductivity of 0.19 W/mK.
When properly installed, 42.5mm Ecotherm Eco-Liner is engineered for indefinite service life. Product durability depends on installation methodology, structural support quality, and operational environment. Note that the 42.5mm insulated plasterboard is unsuitable for use as a moisture barrier or in persistently wet or humid environments. Careful attention to installation techniques and usage conditions is critical for maximising performance and longevity.
Explore our complete Ecotherm range and refine by thickness or coverage using the filters on the left. For technical advice on product suitability or bulk pricing enquiries, contact us on +4402038839057 , email sales@insulationbee or use Live Chat - Lowest UK Insulation Prices.













