Kooltherm K8 Cavity Wall Insulation Board

Cavity Wall Insulation

Cavity Wall Insulation solution that offers thermal conductivities as low as 0.020 W/m.K

What are the benefits of K8 Partial Fill Cavity Wall Insulation?

  • Premium performance rigid thermoset phenolic insulation
  • Clear cavity is maintained – resists moisture penetration
  • Low emissivity foil facings significantly increase the thermal resistance of the cavity
  • Easy to cut and work around awkward details
  • Meets NHBC technical requirements when used with a 50 mm cavity.
  • Unaffected by air infiltration
  • Non–deleterious material
  • Manufactured with a blowing agent that has zero ODP and low GWP

Product brochure

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

Kooltherm K8 Cavity Board

Product information

Product details
Product Literature


Thermal conductivity (insulant thickness) 0.021 W/m.K ( 25–44 mm)
0.020 W/m.K ( ≥ 45 mm)
Compressive strength at 10% compression 100 kPa
Facings Composite foil
Core Premium performance rigid thermoset modified resin 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

How can we help you?

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Do you need help or advice on a project?

Contact our experienced technical services department today.

Get in touch

Kingspan Insulation Ltd.

Bree Industrial Estate


Co. Monaghan

A75 X966

Tel: +353 (0) 42 979 5000