Kingspan Kooltherm K103 is a premium floor insulation board designed for use in both solid concrete and suspended timber floor applications. With its ultra-low thermal conductivity of just 0.019 W/mK, it provides exceptional insulation performance — making it an ideal solution for new builds and renovation projects alike.
Lightweight, easy to handle, and simple to install, Kooltherm K103 helps you meet your energy efficiency targets without needing thick layers of insulation. Whether you're incorporating underfloor heating or aiming to reduce heat loss through your floors, this high-performance board is a reliable choice.
Key Features
High-performance insulation with thermal conductivity of 0.019 W/mK
Allows you to achieve excellent U-values with thinner boards
Ideal for both solid concrete and suspended timber floors
Suitable for use with underfloor heating systems
Lightweight, easy to cut and install
Manufactured using premium Kooltherm technology
Perfect for both new construction and refurbishment projects
BIM objects available for ease of specification
Available Sizes & Coverage
25mm thickness – covers approx. 34.56m² per Pack
40mm thickness – covers approx. 23.04m² per Pack
50mm thickness – covers approx. 17.28m² per Pack
60mm thickness – covers approx. 14.40m² per Pack
70mm thickness – covers approx. 11.52m² per Pack
75mm thickness – covers approx. 11.52m² per Pack
90mm thickness – covers approx. 8.64m² per Pack
100mm thickness – covers approx. 8.64m² per Pack
150mm thickness – covers approx. 5.73m² per Pack
Frequently Asked Questions
1. Is Kooltherm K103 suitable for use with underfloor heating?
Yes, it works perfectly with underfloor heating systems. Its low thermal conductivity ensures minimal heat is lost downwards, making the system more efficient.
2. What makes Kooltherm K103 different from standard insulation boards?
Kooltherm K103 offers premium performance with one of the **lowest thermal conductivity values** on the market. This means you can achieve the same insulation performance using less thickness compared to standard boards.
3. Can I use Kooltherm K103 for both new build and refurbishment projects?
Absolutely. It’s designed to be highly versatile, making it suitable for both **new construction** and **retrofit applications**.
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