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Thermal conductivity OPTIM-R panels achieve a declared thermal conductivity of 0.007 W/m·K
Euroclass E
Compressive strength ≥ 150 kPa (at 10% compression)
Product thickness 20 – 50 mm
Product length 300 – 1200 mm
Product width 300 – 600 mm


Kingspan OPTIM-R Flooring System

Price On Application

Thermal conductivity OPTIM-R panels achieve a declared thermal conductivity of 0.007 W/m·K
Euroclass E
Compressive strength ≥ 150 kPa (at 10% compression)
Product thickness 20 – 50 mm
Product length 300 – 1200 mm
Product width 300 – 600 mm

Optim-R Flooring System

Kingspan Optim-R Flooring System is an insulation material made up of a rigid vacuum panel with a microporous core with a metallized film facing designed mainly for the use of industrial and commercial buildings.

The microporous core is evacuated and sealed in a thin, gas-tight envelop of film providing an incredible thermal conductivity of just 0.007W/mK, creating the thinnest possible solution to insulation projects. The thermal performance of Optim-R is five times better than any commonly used insulation materials. The Optim-R slabs are a thin panel saving space and creating insulation solutions for small spaces. The slabs are accompanied by Infill Flex Strips.

The Optim-R Flooring panels are available in a wide range of lengths (300-1200mm), widths (300-600mm) and thickness from 20mm to 50mm to provide a fitting suitable for every application.


  • Available for new builds or refurbishments
  • 150 kPa at 10% compression
  • Available in square or rectangular panels
  • Bespoke design service
  • Accompanying product available to ensure accurate fit – Flex Strips
  • Five times better than standard insulation materials
  • Long lasting and durable
  • Vapour resistant
  • Enhances U-values in areas that are recognised as reducing thermal performance
  • Non-deleterious material
  • Kingspan Infill Flex Strips:
  • Flex strips are made up of a high-performance rigid thermoset phenolic polyisocyanurate (PIR) insulant with glass tissue facings bonded to each side. Once the OPTIM-R panels have been installed, the Kooltherm flex strips are designed to infill remaining spaces below 300mm and around problems areas such as penetrations.


Kingspan OPTIM-R panels should not be cut or pierced. The substrate must be clean, dry, and level with no sharp objects or edges. To cut of the Kingspan OPTIM-R flex strips should be done using a fine-toothed saw, or by scoring the strip with a sharp knife and snapping the board over a straight edge and then cutting the facing on the other side. To achieve close-butting joints and continuity of insulation ensure accurate trimming of the flex strips.


When installed correctly and protected from damage, the Kingspan OPTIM-R Flooring System can provide reliable long term thermal performance that will continue to last for the entire lifetime of the building.

The Kingspan Optim-R range should not be used with solvent-based adhesive systems. Damaged board should not be used including boards that have been in direct contact with solvents or acids. The boards core and facings resist attack by microbial growth or mould and do not provide food benefits to vermin.

Packaging and storage:

Kingspan packaging is completely recyclable and should not be considered adequate for outdoor protection. The Kingspan OPTIM-R Flooring System should be stored inside a building and raised off the floor. If indoor storage is not an option, the correct weather proofing materials should be applied to protect the panel from the elements.

Kingspan OPTIM-R panels should not be walked on or used for storage of construction materials. A protective foot or crawl board should be used during the installation process.

Optim-R Flooring System can be installed in a range of methods. These methods include:

  • Beam and dense block ground floor: Below floor screed
  • Solid concrete ground-based floors: Below floor screed
  • Timber floating floor applications
  • Unfloor heating systems

Please see below our Kingspan Optim-R datasheet and safety regulations.

Safety Certifications:
ISO 9001: 2015 Quality Management System
ISO 14001: 2015 Environmental Management Systems
ISO 45001: 2018 Occupational Health and Safety Management
ISO 50001: 2018 Energy Management System
Fire Performance: Euroclass RtF E to BS EN 13501-1:2018
Recyclability: Over 90% Recyclable

More Information:
Length: 300mm, 400mm, 600mm, 1200mm
Width: 300mm, 400mm, 600mm
Thicknesses: 20mm, 25mm, 30mm, 40mm, 50mm
Thermal Conductivity: 0.007W/mK
Material: Microporous Core, Metalized film
Colour: Silver

Thickness (mm) Thermal Conductivity (W/mK) Thermal Resistance M2K/W Length (m) Width (mm)
20 0.007 2.85 300, 400, 600, 1200 300, 400, 600
25 0.007 3.55 300, 400, 600, 1200 300, 400, 600
30 0.007 4.25 300, 400, 600, 1200 300, 400, 600
40 0.007 5.70 300, 400, 600, 1200 300, 400, 600
50 0.007 7.10 300, 400, 600, 1200 300, 400, 600

Can you cut OPTIM-R?

Optim-R insulation panels should not be cut and should be ordered to fit your specific project in the shape and thickness required. Although the OPTIM-R panels cannot be cut, the panels are used alongside Kooltherm Flex Strips. The Flex strips can be cut using a fine-toothed saw or sharp knife to fit specific applications under 300mm in length of width.

Where can OPTIM-R be installed?

OPTIM-R can be installed within floor applications in a range of methods. The OPTIM-R roofing system range is also available for multiple roof applications and methods. See the link to OPTIM-R roofing systems below:

How do you install vacuum insulation panels?

Below a floating floor –

Step 1:

Allow concrete slabs to dry out fully.

The concrete generally dries one day per millimetre of slab thickness. Ensure the slab is flat, smooth and protrusion free. Beam and block floors should be level and grouted. Any irregularities should not go beyond 5mm when measured with a 2m straight edge.

Step 2:

Apply a thin layer of levelling compound to ensure a level surface. Allow to set and harden before continuing – one day per 1mm of slab thickness. If a damp proof membrane is required, it should be laid with joints well lapped and folded, to prevent the passage of groundwater over the concrete slabs or beam and block floor.

The membrane should be brought up to the surrounding walls until it is sufficiently high enough to connect with or form the walls damp proof course.

Step 3:

Preserved treated softwood timber battens should be fitted at doorways, access panels and supporting partitions. The top of the battens should be flush with the top surface of the insulation panels.

Step 4:

Another protection layer is recommended at this stage. This should be installed over the damp proof membrane or substate before installing the insulation panels.

Step 5:

Next the vacuum insulation panels should be installed, they should be loose laid with joints light butted and film flaps facing down. Starting at the external corner of the floor lay the vacuum insulation panels in a break bonded pattern. An appropriate rigid insulation infill board is required wherever run of vacuum insulation panels do not fit. At this stage another protection layer should be laid, follow by an appropriate separation layer to act as a vapour control layer.

Ensure that the separation layer has 150mm overlaps taped to the joints and has turned up 100mm at the walls.

Step 6:

Finally, finish with an appropriate flooring overlay such as timber floorboards to gypsum fibre boards as per the manufacturer’s instructions.






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The Kingspan Group is a family business that was founded in 1965 in Ireland which was making wheelbarrows at the time. Soon after, founder Eugene Murtagh saw an opportunity with roof panels and rigid insulation, which has continued to grow to this day. It has now grown to become one of the most well-known providers of insulation products and is renowned for its excellent quality and high-performance results. Kingspan is also committed to making a difference to the environment and tackling climate change. Kingspan now has 129 manufacturing sites in over 70 countries around the world and is still growing.

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