The 40mm IKO Enertherm ALU PIR Insulation Board delivers reliable thermal performance through a rigid polyisocyanurate foam core that contains no CFCs, HCFCs, or HFCs. This 40mm Insulation Board features dual-sided aluminium facing with seven protective layers of high-quality reflective cladding, engineered for durability. The PIR Board has undergone rigorous testing to verify its performance against water ingress, structural loading, corrosion, and thermal emissivity across demanding environments.
Brand: IKO Enertherm®
Thickness: 40mm
Length: 2400mm
Width: 1200mm
Dimensions: 2,400mm x 1,200mm x 40mm
MPN: 30 IKO ALU
Density: 32 kg/m3
Compressive strength at: 10% deformation: 175kPa (17.5ton/m²)
R-Value: 1.80m2K/W
Thermal Conductivity: 0.022 W/mk
Water vapour diffusion:: PIR foam: μ = 60 – ALU facing μ > 100,000
Applications: Roofs, Walls, Floors, Timber & Steel Frame
BBA Certified: Yes, No.15/5283
Features: Multi-functional ALU PIR Insulation
By Project Type: DIY, New Build, Refurbishment
Installation Method: Loose Laid, Mechanically Fixed, Partially Bonded
Material: PIR
Facing: Aluminium composite facing on both sides
Product Colour: Silver
Product Finish: Aluminium Multi Layer Lamination
Sector: Community & Amenity, Domestic, Education, Health, Hotel & Leisure, Industrial, Mixed Use, Offices, Private Housing, Retail, Social Housing, Utilities
Substrate: Concrete, Masonry Structure, Metal, Timber (Plywood-OSB)
Fire Performance: EN 13501-1: Class E | BS 476 – p7 : Class 1
This 40mm IKO Enertherm PIR board suits external walls, pitched roofs, floors, internal walls, inverted roofs, metal roofs, and flat roofs thanks to its superior thermal performance. The boards enhance energy efficiency and thermal resistance across any application, helping reduce heating and cooling costs when energy bills are a concern. Being entirely free from CFC, HCFC, and HFC, these boards are environmentally responsible and pose no threat to the ozone layer.
Pairing the 40mm PIR insulation board with Roof Membranes is straightforward, and the boards maintain their insulating properties and structural integrity throughout their service life due to excellent dimensional stability. Resistance to rot and mould growth ensures extended durability and performance. The combination of high thermal values and slim profile reduces overall build thickness, maximising usable space in roof, floor, or wall cavities.
IKO Enertherm incorporates Micro Cell Technology (MCT) through carefully balanced raw materials and production methods, creating an exceptionally fine cell structure within the insulation material.
Shape retention: IKO Enertherm boards preserve their form and dimensional stability longer than PIR Boards with larger cell structures. This consistency prevents thermal bridging and guarantees extended service life without degradation of insulating performance.
Moisture resistance: MCT technology in 40mm IKO insulation boards delivers very low long-term water absorption (< 0.6%) compared to alternative materials. The boards remain protected against rot and mould, preserving their thermal value since weight gain from moisture uptake is avoided.
Pressure insulation: 40mm IKO PIR boards withstand significant pressure loads due to their high elasticity. MCT-engineered flexible cells prevent rupture and permanent indentation, even under foot traffic.
Browse our Iko Enertherm range and refine by thickness or coverage using the left-hand filters. For advice on product suitability or bulk quotations, contact us by phone on +4402038839057, email sales@insulationbee, or use Live Chat for the lowest UK Insulation prices.













