Fixing and buying guide

Who this product is for

This board suits trade installers and serious DIY customers undertaking insulation work on residential or light commercial buildings. It is ideal for projects requiring a balance between thermal performance, structural integrity and ease of handling. The standard sheet size and 50mm thickness make it particularly practical for retrofit schemes and new build where layered insulation systems are specified.

Choosing the right specification

The 50mm thickness is commonly used as one layer within a multi-layer insulation build-up. Check your project specification or building regulations requirement for total insulation thickness needed, as you may need to combine multiple boards or use thicker alternatives. The thermal conductivity of 0.022 W/mK is consistent across all available brands. Compressive strength of 175 kPa is suitable for floor, wall and roof applications, but always verify load requirements for your specific use.

• Confirm total insulation thickness required by your design or building control
• Check whether your application is wall, floor or roof to ensure compressive strength is adequate
• Note that brand availability (Ecotherm, IKO, Mannok, Recticel, Unilin) varies with stock; confirm supplier availability before ordering

Handling and preparation

The 1200 x 2400mm sheet size is designed for practical on-site handling by two people. Store boards flat and dry before installation. Inspect each board for damage or compression before fixing. Ensure the substrate (wall, floor or roof structure) is clean, dry and level to receive the insulation. Any gaps or voids between boards and the substrate will reduce thermal performance.

• Keep boards dry and protected from weather until installation
• Check substrate is sound, clean and level before laying or fixing boards
• Plan board layout to minimise waste and ensure tight joints between sheets

Installation and fixing

Fixing method depends on application. For walls, boards are typically mechanically fixed with insulation pins or adhesive, or both. For floors, boards may be laid loose, mechanically fixed or adhered depending on the structural system. For roofs, fixing must be secure against wind uplift. Always follow the board manufacturer's installation guidance and your project specification. Joints between boards should be tight; use compatible foam sealant or tape to seal gaps where required by specification.

• Follow the specific brand manufacturer's installation instructions (Ecotherm, IKO, Mannok, Recticel or Unilin as supplied)
• Use appropriate fixing method for your application: mechanical fixings, adhesive, or combination
• Seal joints between boards with compatible sealant or tape as specified
• Ensure vapour control layer or membrane is installed in accordance with building regulations and design