How and where to use guide
Ecotherm Rigid PIR Insulation 1200 x 2400 x 70mm
Typical applications and installation
These PIR boards are commonly used in cavity wall insulation, suspended timber floor insulation, pitched roof applications and flat roof systems. The lightweight rigid foam construction allows straightforward handling by one or two operatives on site. Install boards between structural elements such as floor joists, wall studs or roof rafters, positioning the foil facing to control vapour movement in line with your building design. The boards can be cut to fit around obstacles using a fine-toothed saw or hot-wire cutter. Secure boards using mechanical fixings such as insulation pins or adhesive suitable for PIR foam, following your structural engineer's specification and Building Regulations requirements.
- Floor insulation: lay boards between joists with foil facing upward to manage moisture
- Wall cavities: fit boards snugly between studs, ensuring no gaps at edges and corners
- Roof applications: install between rafters or on top of existing roof structure as part of a complete system
- Retrofit projects: boards can be fitted to internal or external surfaces depending on vapour strategy
Thermal and structural performance
The thermal conductivity of 0.022 W/mK ensures consistent insulation performance to specification across the board. This value is critical for calculating U-values and meeting Building Regulations thermal requirements. The compressive strength of 175 kPa means the board will maintain its integrity under typical building loads such as foot traffic on floors, ceiling plasterboard weight and roof snow loads. Do not overload boards during storage or installation, and ensure adequate structural support beneath the insulation layer to distribute loads evenly.
- Thermal conductivity 0.022 W/mK supports accurate U-value calculations
- Compressive strength 175 kPa suitable for residential and light commercial loads
- Foil facing provides vapour control and reduces air leakage when joints are taped
- Closed-cell rigid foam resists moisture absorption and maintains performance over time
Handling, storage and site safety
Store boards flat and dry on site, protected from weather and direct sunlight. Stack boards carefully to avoid crushing lower sheets; do not exceed safe stacking heights. The lightweight nature of PIR foam makes these boards easier to handle than mineral wool or dense boards, reducing manual handling strain. Wear appropriate personal protective equipment including gloves and eye protection when cutting boards, as dust and foam particles may be released. Ensure adequate ventilation when working with the product. Do not expose boards to naked flame or high temperatures, as PIR foam is combustible. Follow your project's fire safety strategy and any additional fire protection requirements specified by your architect or building control.
- Store flat and dry; protect from weather and UV exposure
- Handle carefully to avoid damage to foil facing, which may compromise vapour control
- Use sharp tools for clean cuts and minimal dust generation
- Observe site safety protocols and Building Regulations fire safety requirements
Maintenance and long-term performance
Once installed and properly sealed as part of a complete insulation system, Ecotherm PIR boards require no routine maintenance. The closed-cell rigid foam structure and foil facing protect the material from moisture ingress and degradation. Ensure all joints between boards are sealed with appropriate tape or sealant to maintain the vapour control layer and prevent air leakage. Inspect the installation after completion to confirm boards are secure and joints are properly sealed. The thermal performance of the board will remain consistent throughout its service life if the installation is protected from physical damage and moisture penetration.
- Seal all board joints with foil tape or compatible sealant to maintain vapour control
- Inspect installation for gaps, damage or movement before covering with finishes
- Protect boards from impact damage during and after installation
- Ensure adequate ventilation in cavities where required by Building Regulations