How and where to use guide
Ecotherm Rigid PIR Insulation 1200 x 2400 x 75mm
Typical applications and where to use
Ecotherm PIR boards are suitable for use in floors, walls and roofs across both new build and retrofit projects. In floor applications, the 175 kPa compressive strength allows the board to support domestic and light commercial loads when properly installed over joists or solid substrates. In wall applications, boards can be fitted between timber studs or against masonry as part of cavity fill or external insulation systems. In roof applications, boards work effectively between rafters or above ceiling joists, depending on your build specification. The lightweight rigid format makes it practical for single-handed installation on site, reducing labour time compared to bulk insulation materials.
- Floor insulation: between joists, under screeds, or over solid floors in domestic and light commercial buildings
- Wall insulation: cavity fill, stud wall infill, or external insulation layers in refurbishment projects
- Roof insulation: between rafters, above ceiling joists, or as part of pitched roof thermal upgrades
- Retrofit applications: upgrading existing building fabric without major structural work
Installation and handling on site
Before installation, ensure the substrate is clean, dry and level to allow boards to sit flush and maintain thermal performance. The 1200 x 2400mm format can be cut to size using a fine-toothed saw or hot-wire cutter; plan cuts to minimise waste and fit around service runs. Position boards with foil facing outward where vapour control is required, typically on the warm side of the insulation layer. Secure boards using mechanical fixings, adhesive or a combination method appropriate to your application—floor boards may be taped at joints and weighted, whilst wall and roof boards typically require fixing to timber or masonry. Stagger board joints to avoid continuous weak points and maintain thermal integrity. Leave minimal gaps at edges; seal any gaps with expanding foam or tape to prevent thermal bridging and air leakage.
- Prepare substrate: ensure clean, dry, level surface free of debris
- Cut boards with fine-toothed saw or hot-wire cutter; wear appropriate PPE
- Position foil facing on the warm side to support vapour control
- Secure using mechanical fixings, adhesive or combination method suited to application
- Stagger joints and seal gaps to maintain thermal performance
- Allow adequate ventilation during and after installation to manage moisture
Thermal performance and building regulations
The 0.022 W/mK thermal conductivity rating delivers effective insulation performance for building fabric upgrades and meets specification requirements for new build and retrofit projects. A single 75mm board contributes meaningful thermal resistance; calculate total U-values based on your complete build-up including other materials, air films and any additional insulation layers. The foil facing provides vapour control, reducing the need for separate vapour barriers in many applications, though always check your specific building design and local building regulations requirements. Compressive strength of 175 kPa is suitable for domestic floor loads and typical roof loadings; confirm suitability for your specific application before installation.
- Thermal conductivity 0.022 W/mK provides effective insulation in floor, wall and roof applications
- Foil facing supports vapour control; may reduce need for separate barriers
- Compressive strength 175 kPa suitable for domestic floors and typical roof loads
- Calculate total U-values including all layers; consult building regulations for your project
Maintenance and on-site storage
Store boards flat and dry on site, protected from weather and direct sunlight to prevent degradation. Keep boards away from naked flames and high-temperature sources; PIR foam is combustible and requires appropriate fire safety measures during storage and installation. Do not expose boards to prolonged moisture or standing water; whilst the foil facing provides some protection, the foam itself can absorb moisture if damaged. Once installed and covered, Ecotherm PIR boards require no routine maintenance. If boards are damaged during installation or in service, cut out the affected area and patch with new board material, sealing joints carefully to restore thermal and vapour control performance.
- Store flat, dry and protected from weather and direct sunlight
- Keep away from naked flames and high-temperature sources
- Protect from prolonged moisture exposure; repair damaged facing promptly
- Once installed and covered, no routine maintenance required