Kingspan Kooltherm K5 External Wall Board (0.72m²)

Brand: Kingspan
SKU: KNG-K5-025
£11.99 Incl. VAT
£11.99 Incl. VAT (regular price)
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    Kingspan Kooltherm K5 External Wall Board

    Kingspan Kooltherm K5 external wall board is a premium performance phenolic insulation board for external wall insulation systems. This product's key feature is that it is great for saving space in your EWI installation. The insulation boards have a rigid phenolic core, which offers excellent thermal capabilities, and is ideal for use with our thin coat renders to create a highly effective insulation system. Kingspan is part of the EWI Pro space-saving system. Kingspan Kooltherm K5 insulation board is ideal for applications where space is at a premium. For example, it is great for narrow passageways between buildings and under window sills that cannot be extended. Kooltherm K5 external wall boards offer upgraded thermal performance to other insulation materials on the market. Therefore, they are ideal for maximising performance without sacrificing too much external space. Kingspan K5 insulation is made of premium performance phenolic foam. The boards should be installed using the EWI-225 Premium Basecoat for maximum structural stability, and then finished with a decorative thin coat render such as EWI-075. The result is a superior external insulation system with excellent thermal comfort for end-users.

    Technical Specification

    • Composition: phenolic insulation core faced on both sides with glass tissue
    • Thermal Conductivity:
    0.022 W/mK (insulation thickness 25 - 44 mm) 0.021 W/mK (insulation thickness ≥ 45 mm)
    • Reaction to Fire: Euroclass C-s2,d0
    • Size of boards: 1200 x 600mm
    • Weight: 12.6kg
    • Weight/m2: 1.75kg
    • The average compressive strength of Kingspan Kooltherm K5 exceeds 100 kPa when tested to EN 826: 2013

    Application

    You should install Kooltherm K5 insulation boards in accordance with the manufacturer’s installation guidelines. These should cover design and all aspects of the application of the insulation. We recommend fixing the boards to the substrate (masonry or timber) using our Premium Basecoat and metal screw mechanical fixings. After fixing them to an external wall, the Kingspan K5 boards should be covered with an outer layer, either by the mortar basecoat or simply by a netting covering to protect from excessive heat, moisture and UV exposure. Then, you should apply a protective render topcoat. For further information, please download our full installation guide.

    Kingspan Insulation Board Storage

    Shelf life: please see the manufacturer’s date of expiry. Keep in a dry place, in the original packaging. Avoid excess heat or UV light exposure. You can read more about the materials required for installing Kingspan Insulation Boards here. Alternatively, you can discover our tips for rendering with Kingspan.

    Frequently Asked Questions

    Kingspan K5 insulation boards feature a rigid phenolic foam core faced on both sides with glass tissue. This construction provides high compressive strength, excellent fire performance, and superior insulation compared to materials such as EPS or mineral wool.

    Kingspan K5 is highly efficient. Boards 45 mm and thicker have a thermal conductivity as low as 0.021 W/mK, so you can reach low U-values with thinner insulation and keep walls slimmer. It’s ideal for retrofits and tight areas, like narrow passageways or under window sills, where you need to minimise the build-up.

    Kingspan Kooltherm K5 is suitable for use on masonry and timber substrates in both new-build and retrofit external wall insulation systems. It’s especially effective where external space is restricted or where a high thermal performance is required in a thin layer.

    Kingspan K5 should be installed according to the manufacturer’s installation guidelines. For best results, use EWI-225 Premium Basecoat to bond the boards to the substrate and secure them with mechanical fixings.

    Once installed, the boards should be covered with a basecoat and reinforcing fibreglass mesh, followed by a thin coat render such as EWI-075 Silicone Render for a durable, weather-resistant finish.

    Kingspan K5 pairs perfectly with EWI Pro thin coat renders, including EWI-075 Silicone Render, which provides a flexible, breathable and UV-resistant finish. This ensures your system performs well both thermally and aesthetically.

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