Kooltherm K8 Plus Cavity Wall Insulation Board

K8 Plus Render

Premium performance partial fill cavity wall insulation which allows a reduced minimum cavity width of 20mm.

What are the benefits of K8 Plus Partial Fill Cavity Wall Insulation?
  • Rigid thermoset phenolic insulation which offer 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/m2.K 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

Product information

Product details
Product Literature
Architect Area Login


Thermal conductivity (insulant thickness) 0.020 W/m.K ( ≥ 45 mm)
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

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K8 Plus - Render - Cover 2020

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