How and where to use guide
Ecotherm Rigid PIR Insulation 1200 x 2400 x 100mm
Typical applications and installation locations
These PIR boards are suitable for use in cavity wall insulation, solid wall retrofit, floor insulation between joists or over concrete slabs, and roof insulation in pitched or flat roof constructions. The rigid format and compressive strength of 175 kPa means the boards can support loads in floor applications and maintain performance under typical building pressures. The 1200 x 2400mm sheet size fits standard wall and roof spacings, reducing cutting waste and installation time on site.
- Cavity wall insulation in new build construction
- Solid wall insulation in refurbishment and retrofit projects
- Floor insulation between timber joists or over concrete substrates
- Pitched and flat roof insulation applications
- Internal and external wall applications where moisture resistance is required
Installation and handling on site
The lightweight rigid board format reduces handling effort during installation. Boards should be cut to fit the building cavity or space using a fine-toothed saw or hot-wire cutter. Ensure boards are fitted snugly between studs, joists or rafters to minimise thermal bridging and air gaps. In wall applications, boards may be mechanically fixed or supported by the building frame. For floor applications, boards should be laid flat and supported across their full width to distribute loads evenly. The moisture-resistant profile means boards can be installed in damp conditions, but ensure adequate ventilation is maintained in the building assembly to prevent moisture accumulation.
- Cut boards using a fine-toothed saw or hot-wire cutter for clean edges
- Fit boards snugly to minimise gaps and thermal bridging
- Support boards fully across their width in floor applications
- Maintain adequate ventilation in the building assembly
- Protect boards from direct weather exposure during construction
Performance and limitations
With a thermal conductivity of 0.022 W/mK, these boards deliver effective insulation performance in most building applications. The compressive strength of 175 kPa is suitable for standard residential and light commercial loads in floor and wall applications. However, boards are not designed for applications subject to heavy point loads or high-traffic areas without additional protection or support. The 100mm thickness provides a standard insulation value; thicker boards may be required to meet higher thermal performance targets in some retrofit or new build projects. The moisture-resistant profile protects the board material, but the building assembly must include appropriate vapour control and drainage to prevent moisture problems.
- Thermal conductivity of 0.022 W/mK suitable for standard insulation requirements
- Compressive strength of 175 kPa adequate for residential and light commercial loads
- Not suitable for heavy point loads without additional protection
- 100mm thickness provides standard insulation value; consider thicker boards for enhanced performance
- Moisture-resistant profile requires complementary vapour control in the building assembly
On-site storage and maintenance
Store boards in a dry location on site and protect from direct weather exposure during construction. Stack boards flat to prevent warping or damage. The rigid format means boards are less susceptible to compression than softer insulation materials, but avoid stacking heavy materials on top of boards during storage. Once installed, PIR boards require no routine maintenance. The moisture-resistant profile ensures long-term durability in the building fabric, provided the overall building assembly includes appropriate ventilation and moisture management. Inspect boards during installation to ensure they are free from damage and fit correctly in the building cavity.
- Store boards flat in a dry location protected from weather
- Avoid stacking heavy materials on top of boards
- Inspect boards for damage before installation
- Ensure correct fit in building cavities to maintain thermal performance
- No routine maintenance required once installed