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A Fully Insulated Foundation System

The KORE Insulated Foundation System fully insulates the foundation of the home and is designed to deliver some of the lowest U-values available on the market, all while virtually eliminating the critical wall-to-floor cold bridge. Essentially, the Insulated Foundation System wraps the foundation of your home in a layer of Expanded Polystyrene (EPS300) to insulate your home from the ground up.

KORE’s Insulated Foundation System ensures there is no thermal break between the wall and foundation, eliminating thermal bridging at one of a building’s most common junctions. When combined with building best practices, the Insulated Foundation System ensures an air tight, super-insulated home designed to surpass building regulations and achieve high Building Energy Ratings – including Passive House Certification and other low energy building methods.

KORE Insulated Foundation Reduces Concrete Requirements


KORE’s Insulated Foundation System reduces the amount of concrete required for the foundation between 50 and 60 percent. This reduces your costs for both material and labour, making an insulated foundation a cost effective solution for your next new build or extension.

KORE Insulated Foundation Eliminates Thermal Bridging


KORE’s Insulated Foundation System virtually eliminates the critical wall-to-floor cold bridge. EPS is used to wrap the junction in a continuous layer of insulation, ensuring the wall to floor thermal bridge is eliminated and there is no break in insulation between the non-insulating materials.

KORE Insulated Foundation Provides Low U-Values


KORE’s Insulated Foundation System can achieve U-values much lower than those required by Part L 2011 and Part L 2019 (nZEB). Typical U-values provided by KORE’s Insulated Foundation System range from 0.08W/m2k to 0.10W/m2K depending on the specifications of the project.

KORE Insulated Foundation System is Designed to Last a Lifetime


Like all of our EPS products, the Insulated Foundation System is designed to last the lifetime of the building. The thermal performance of KORE EPS will not diminish over time, is water resistant, and eliminates the possibility of condensation, mould growth and fungus behind the skirting board.

How does an insulated foundation work?

KORE’s Insulated Foundation System works much like a traditional raft foundation. The EPS element is specifically designed and cut to suit the building type for installation. The foundation’s exceptional compressive strength makes the product suitable for both domestic and commercial applications.

The structural strength of the Insulated Foundation System is a result of the combination of Expanded Polystyrene (EPS300) concrete and steel. The system is suitable for use with all applications, including insulated concrete formwork (ICF), traditional block and timber frame houses.

Heavy internal loads can easily be accommodated onto the insulated foundation by thickening the slab to 200mm and by installing EPS300 under the thickened slab area. The Insulated Foundation raft foundation and waffle slab solutions are suitable for soft ground conditions as the system allows the weight of the house to be transferred throughout the slab.

KORE’s Insulated Foundation System is combined with KORE Floor Insulation, specifically KORE Floor EPS100 White. This ensures a complete floor insulation solution providing U-values from 0.09W/m2K to 0.10W/m2K.

MEET nZEB with KORE’s Insulated Foundation System

KORE’s EPS Insulated Foundation System has been designed to meet and exceed the U-value requirements of the proposed Part L 2019, and continues to meet the requirements of Part L 2011.

From 1st November 2019, the proposed U-value requirement for floor insulation in new builds is 0.18W/m2K. For floors with underfloor heating the required U-value of 0.15W/m2K.

Current building regulations require 0.21W/m2K, and 0.15W/m2K in buildings with underfloor heating. The following table shows the grade of EPS and its thickness required to meet the minimum U-value requirements.

Material Thickness U-Value
EPS100 White 300mm 0.10W/m2K


*Subject to site specific calculations. Assumed P.A of 0.4.

For more information contact our technical team.

KORE's Insulated Foundation Insulates with 98% Air

Like all our EPS solutions, KORE’s Insulated Foundation System was designed with efficiency, cost effectiveness and performance in mind.

Explore KORE’s Insulated Foundation System

For illustrative purposes only. Please contact our technical team for more information.

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KORE Insulated Foundation System Technical Specifications

A Complete Foundation System Made From EPS

All U-value calculations are in accordance with BS EN ISO 6946:2007. Ground floor U-value calculations are different from wall and roof calculations in that reference to the construction detail alone is not sufficient to calculate the U-value. The floor area and perimeter of the external wall and thickness of the wall must be known to calculate floor U-values correctly. For more information on our calculation assumptions please reference the KORE Insulated Foundation System Design Guide.

Insulation Thickness (mm) Perimeter/Area (m2)
0.2 0.3 0.4 0.5 0.6 0.7
U-Value (W/m2K)
300 0.09 0.10 0.10 0.10 0.10 0.10
Insulation Thickness (mm) Perimeter/Area (m2)
0.2 0.3 0.4 0.5 0.6 0.7
U-Value (w/m2K)
300 0.09 0.10 0.10 0.10 0.10 0.10

A 360 Degree View of KORE’s Insulated Foundation System

Rotate the 3D image below to explore KORE’s Insulated Foundation System. The image can be rotated on the X and Y axis. For more information please contact our technical department.

KORE Insulated Foundation System Technical Details

The following guidelines are for reference only and may not include all relevant details or applications. For more information please contact the KORE technical team or download our Declaration of Performance Certificates.

Design Standards

The KORE Insulated Foundation System should be designed by a qualified engineer. KORE does not design or inspect foundations. The information below is for general reference only. The following standards should be consulted regarding the construction of floors:

  • BS 8215:1991 Code of practice for the design and installation of damp proof courses in masonry construction
  • BS8102:1009 Code of practice for the protection of buildings against water from the ground
  • BRE GBG28 Domestic Floors: construction, insulation and damp-proofing
  • BRE GG74 Radon protection for new dwellings
  • BS 6399-1:1996: Loading for buildings – Code of practice for dead and imposed loads
  • BS 8203:2001 Code of practice for the installation of resilient floor coverings
  • BRE Digest Nos. 240, 241 and 242

Thermal Conductivity

The thermal conductivity of KORE’s Insulated Foundation System products are in accordance with IS EN 13163:2012 and EN 12667 Thermal performance of building materials and products – determination of thermal resistance by means of guarded hot plate and heat flow method.

– KORE Passive Foundation EPS300 White: 0.032W/mK

Thermal Resistance

Thermal resistance, known as the R-value, varies with the thickness of the insulation. To calculate the thermal resistance (m2.K/W) divide the thickness of the insulation by its thermal conductivity and round down to the nearest 0.05.

KORE Insulated Foundation EPS300
Thickness Insulation (mm) Thermal Resistance (m2.K/W)
100 3.125
150 4.688
200 6.250
250 7.813

KORE Insulated Foundation System Downloads

The following is a sample of technical documents available for KORE Insulated Foundation System. For the complete technical library please join the KORE Resource Centre.

  • Download the KORE Insulated Foundation System Design GuideDownload
  • Download the KORE Insulated Foundation System Brochure (Part L 2019)Download
  • Download the KORE Floor Insulation NSAI CertificateDownload
  • Download the KORE Floor Insulation BIM Object FilesDownload

Request a quote or get in touch today

Request a free, no obligation quotation today by clicking on the Request a Quote button below. Remember to include your floor plans in PDF or AutoCAD format so we can provide an accurate price. For general questions, get in touch with us!

published:18 Sep 2018