Kooltherm K3 Floor Insulation Board

Kingspan Kooltherm K3

Advanced underfloor insulation board with low thermal conductivity

This floor insulation board provides a level of thermal performance that is unrivalled in the world of rigid thermoset insulation materials. It can be used on solid or suspended floors and ideal for both new build and refurbishment projects.
  • Thermal conductivity as low as 0.020 W/mK
  • Can achieve a slimmer overall floor build than standard insulation, which can reduce foor to ceiling height
  • Part of our Kooltherm range of advanced insulation

Technical Information

Thermal conductivity (insulant thickness) 0.021 W/m.K ( 25–44 mm)
0.020 W/m.K ( ≥ 45 mm)
Compressive strength at 10% compression 120 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 2.4 m
The current declaration of performance is available to download below. Please email technical@kingspaninsulation.ie to request a previous declaration of performance.

Kooltherm K3 DoP 006 March 2021


Kingspan Kooltherm K3 floor insulation boards are produced at Kingspan Insulation’s Castleblayney, Ireland manufacturing facility. They are manufactured with a blowing agent that has zero Ozone Depletion Potential (ODP) and a low Global Warming Potential (GWP).
Planet Passionate
Through our Planet Passionate group-wide sustainability programme, we aim to make significant advances in the sustainability of our business and our products.


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