125mm Unilin (Xtratherm) CavityTherm CT/PIR Cavity Wall Boards
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Product Code:
0.54 m²
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Thin-R Plus CavityTherm is an innovative built-in insulation for traditional walls that achieves passive level U-Values as low as 0.12 W/m2K with excellent thermal bridging detailing in cavities less than 150mm wide. It has a unique engineered profile facing that directs any moisture that might penetrate the external wall down the protective facing and back onto the external leaf, giving added protection from wind-driven rain.

Key points :

Key Points:

  • Available with a full range of innovative detailing accessories.
  • PIR core.
  • High Thermal Performance.
  • Zero Ozone Depletion Potential (ODP) and GWP < 5.
Specification :


  • Thickness: 125mm
  • Width: 450mm
  • Length: 1200mm
  • Board coverage: 0.54 m²
  • Board Profile: Rebated Edge
  • Density: 30kg/m³
  • Thermal Conductivity: 0.021 W/mK
  • R-Value: 5.71 m²K/W
  • Typical U-Values: Walls = 0.14 W/m²K
  • Fire Rating: Euroclass F
  • Compressive Strength: >100kPa @ 10% Compression


  • Suitable for New Build and Refurbishment Projects.
  • For use in Cavity Walls.


  • ISO9001 - Quality Management Systems
  • ISO14001 - Environmental Management
  • A+ rating on BRE Green Guide
  • BBA Certification No. 10/4786
Datasheets & Documents.
If you require a Safety datasheet (SDS) for this product please get in touch.
If you require a BBA Certificate for this product please get in touch.