OPTIM-R Flooring System
Optimum performance solution
Solid Concrete Ground Floor Insulation
Our range of solid concrete floor insulation products provide solutions for solid floors, below the screed or below the concrete slab, including floors with underfloor heating.
How to insulate a concrete floor
The first thing to think about is which insulation to use. There are a number of key considerations when selecting insulation, including the thermal performance, thickness and cost of the material. We offer a range of different materials and this page will talk you through the options.
On this page you will find:
- Our solid floor insulation products from our Kingspan GreenGuard, OPTIM-R, Kooltherm and Therma ranges.
- A comparison of the different solutions we offer so you can select the right product for your project.
- Useful links to help with your project, including how to find a stockist and installation advice.
If you are a homeowner don't forget to take a look at our Homeowner Hub where you can find a wealth of advice and support for your project!
We have a number of different solutions for solid concrete floors, depending on the design and performance requirements. Scroll down for full comparison table.
Our Solid Concrete Floor Insulation Solutions
Useful Links
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Floor insulation support
Compare our Solid Concrete Floor Insulation Solutions
Material | Advantages | Products |
|---|---|---|
Vacuum insulation panels (VIPs) | Suited to applications where there may be a requirement for both low U-values and the thinnest possible roof build-up Problem solver for where a lack of construction depth or space is an issue Declared thermal conductivity of just 0.007 W/mK Design service for your specific floor | |
Phenolic | Rigid insulaton with a thermal conductivity of 0.019 W/mK One of the thinnest commonly used insulants for pitched roofs, allowing U-values to be reached with minimal thickness Unaffected by air infiltration and resistant to the passage of water vapour Easy to handle and install compared to some other commonly used insulants | |
PIR | Rigid insulation with a thermal conductivity of 0.022 W/mK Unaffected by air infiltration and resistant to the passage of water vapour Easy to handle and install compared to some other commonly used insulants | |
Extruded Polystyrene (XPS) | High compressive strength - ideal for heavy duty commercial, industrial and cold store flooring. Available in a number of grades to suit a range of service loads. Rigid insulation with thermal conductivities as low as 0.033 W/mK Unaffected by air infiltration and resistant to ground moisture penetration Easy to handle and install compared to some other commonly used insulants
| Kingspan GreenGuard GG300 - compressive strength of 300 kPa Kingspan GreenGuard GG500 - compressive strength of 500 kPa Kingspan GreenGuard GG700 - compressive strength of 700 kPa |
Page updated - 12/08/2025