Kingspan K110 Kooltherm
(1 Product)Kingspan Kooltherm K110 FM Soffit Board provides high-performance thermal insulation for concrete soffits and structural ceilings in both new build and refurbishment projects. It delivers a low thermal conductivity of 0.018 W/mK with FM-approved fire performance, offering long-term durability, moisture resistance, and low environmental impact for low-energy, low-carbon buildings.
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Understanding Kingspan Kooltherm K110
Kingspan Kooltherm K110 FM Soffit Board is a premium-performance rigid phenolic insulation designed specifically for insulating structural ceilings and soffits.
Manufactured with a fibre-free thermoset phenolic core, the product achieves a thermal conductivity as low as 0.018 W/mK, making it one of the most efficient insulation solutions for this application. The board’s construction includes a glass tissue inner facing and a low emissivity composite foil outer facing, each autohesively bonded during manufacture for enhanced integrity and durability.
The insulation’s rigid core is produced using a blowing agent with zero Ozone Depletion Potential (ODP) and low Global Warming Potential (GWP), ensuring compliance with modern sustainability and environmental objectives. It is FM-approved to Class 1 fire rating (Class Number 4880), offering confidence for use in a range of commercial and residential developments requiring enhanced fire performance.
It is unaffected by air infiltration and resistant to the passage of water vapour, ensuring long-term stability in exposed or semi-exposed soffit environments. It is lightweight, easy to handle, and suitable for mechanical fixing directly to concrete decks using thermally broken fasteners, minimising thermal bridging in accordance with BS EN ISO 6946: 2017.
Manufactured under ISO 9001, ISO 14001, OHSAS 18001 and ISO 50001 certified management systems, the product meets the requirements of modern performance, safety, and sustainability standards, supported by BBA Certificate 16/5299 and LABC Registered Details Certificate EWWS545F2.
Material Range
- Core: Rigid, fibre-free thermoset phenolic insulation with zero ODP and low GWP blowing agent.
- Inner Facing: Glass tissue-based layer autohesively bonded to the insulation core for adhesion and stability.
- Outer Facing: Low emissivity composite foil providing enhanced thermal resistance and surface protection.
- Standard Dimensions: 2.4m × 1.2m boards in a range of thicknesses to meet design U-values.
Key Features
- Thermal Conductivity: Achieves 0.018 W/mK for thermal efficiency.
- Fire Performance: FM-approved to Class 1 (Class No. 4880).
- Moisture Resistance: Resistant to water vapour transmission and unaffected by air infiltration.
- Compressive Strength: Exceeds 100 kPa (to BS EN 826: 2013).
- Durability: Long-term performance when correctly installed and protected from direct weathering.
- Environmental Performance: Zero ODP, low GWP, BRE Green Guide A+ Rating, BES 6001 ‘Excellent’ certification.
- Handling & Installation: Lightweight, easy to cut, and suitable for direct mechanical fixing to concrete soffits.
- Chemical Resistance: Resistant to most dilute acids, alkalis, and mineral oils; not suitable for use with solvent-based adhesives.
Typical Applications
- Concrete Soffits: Applied directly to the underside of reinforced concrete slabs in car parks, basements, and structural ceilings to improve thermal performance.
- Commercial & Residential Developments: Used in both new build and refurbishment projects to meet Part L and regional Building Regulation U-value requirements.
- Low Energy Construction: Suitable for low-carbon, thermally efficient building envelopes where insulation continuity is essential.
Specification & Standards
- Thermal Standards: Calculated in accordance with BS EN ISO 6946: 2017 and BR 443 conventions.
- Compressive Strength: Tested to BS EN 826: 2013.
- Water Vapour Resistance: Tested to BS EN 12086: 2013.
- Fire Rating: FM Class 1 (Class No. 4880) certified.
- Environmental Certification: BRE A+ Green Guide rating; BES 6001 ‘Excellent’ Responsible Sourcing.
- Wind Loading: Design to BS EN 1991-1-4: 2005 + A1: 2010.
- Lightning Protection: To BS EN 62305: 2011.
- Management Systems: Manufactured under ISO 9001, ISO 14001, OHSAS 18001 and ISO 50001.
Related Materials and Construction Uses
Kooltherm K110 FM Soffit Board integrates with other Kingspan Kooltherm systems and complementary insulation types to achieve continuity of the building envelope.
It can be used alongside floor, wall, and roof insulation boards to maintain consistent thermal performance across structural junctions.
The product is compatible with thermally broken fixings, vapour control layers, and protective finishes, forming part of high-performance, low-energy construction systems that meet advanced sustainability and efficiency targets.
Frequently Asked Kingspan K110 Questions
What Does FM Approval Mean For K110 FM?
FM Approval indicates the product meets Factory Mutual’s fire performance and quality standards, suitable for use in FM Global insured projects requiring certified fire safety compliance.
How Is K110 Installed?
Boards are fixed directly to the soffit using proprietary mechanical fixings or adhesive systems. Installation should follow Kingspan’s technical instructions and comply with BS 5422 and BS 5250 standards.
Can K110 Be Left Exposed?
Yes, the foil-facing allows K110 FM to be left exposed in some applications, providing a clean, reflective surface. Where aesthetic or impact protection is required, additional finishes or coatings may be applied.
Can K110 Be Used In Car Parks And Basements?
Yes, it is suitable for soffits in car parks, plant rooms, and basements where high thermal efficiency, moisture resistance, and fire-rated performance are necessary.
