Kooltherm K8 Plus Cavity Wall Insulation Board

K8 Plus

Advanced partial fill cavity wall insulation which allows a reduced minimum cavity width of 20mm

  • Thermal conductivities as low as 0.020 W/mK
  • 20mm clear cavity is maintained – resists moisture penetration
  • Engineered jointing to resist water ingress
  • 0.13 W/m²K U-value achieved in standard 150mm cavity 
  • Achieves Euroclass B-s1,d0

Product Brochure

Our product brochures include U-value tables, handling advice and installation guidance.

Kooltherm K8 Plus Cavity Board Brochure

Technical Information & Downloads

Thermal conductivity (insulant thickness) 0.020 W/m.K ( ≥ 45 mm)
Euroclass B-s1,d0
Compressive strength at 10% compression 100 kPa
Facings Low emissivity durable scrim reinforced composite foil facing on both sides  
Core Premium performance fibre-free rigid thermoset phenolic insulant manufactured with a blowing agent that has zero Ozone Depletion Potential (ODP) and low Global Warming Potential (GWP)
Board size 1.2 x 0.45 m

Kooltherm K8 Plus Cavity Board DOP July 2020

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