60mm Kingspan Kooltherm K5 External Wall Insulation Board

60mm Kingspan Kooltherm K5 External Wall Insulation Board delivers premium thermal performance for masonry wall applications. Built with a fibre-free, rigid thermoset phenolic core, this board excels in external wall insulation systems and thin coat rendering projects.

The 60mm K5 board works seamlessly with both traditional and lightweight polymer-modified renders. Installation happens entirely from the outside, allowing you to upgrade existing properties without disrupting residents.

As one of the slimmest external wall insulation board (EWI) options on the market, it maximises internal space—essential for buildings where internal insulation isn't practical.

This board features mineral glass facings bonded to the core during production and achieves a certified thermal conductivity (lambda) of 0.022 W/mK. The phenolic core delivers outstanding thermal efficiency whilst using a blowing agent with zero Ozone Depletion Potential (ODP) and minimal Global Warming Potential (GWP).

Kingspan Kooltherm K5 60mm satisfies Building Regulations through superior thermal performance at reduced thickness. It delivers higher insulation values with a thinner profile than EPS, XPS, and mineral wool alternatives.

Each board measures 1200mm x 600mm x 60mm, offering lightweight handling and straightforward installation.

Product specification

• Brand: Kingspan
• Model: 60mm K5 Single Board
• Thickness: 60mm
• Length: 1200mm
• Width: 600mm
• Weight: 0.57kg
• Dimensions: 1,200mm x 600mm x 60mm
• Board Coverage: 0.72m2 per board
• Pack Coverage: 0.72m2
• Pack Quantity: 1 board
• Compressive Strength: 100kPa
• Density: 35kg/m3
• Thermal Conductivity: 0.022 W/mK
• R-Value: 2.50m2K/W
• Material: Rigid thermoset phenolic insulation
• Profile: Square edge
• Colour: Light shade of red
• Fire Classification: Euroclass C-s2,d0
• Finish: Mineral glass coatings
• Application Temperature: from +5 °C to +25 °C
• Applications: External insulation for masonry walls
• BBA Certified: Yes
• Features: Thinnest commonly used External Wall Insulation Board
• Manufacturer: Kingspan Kooltherm® K5

Application

Install Kooltherm K5 boards according to manufacturer specifications, which outline comprehensive design and installation procedures. We recommend fixing boards to your substrate (masonry or timber) using our Premium Basecoat combined with metal screw mechanical fixings for best performance.

After securing boards to the external wall, apply a protective outer layer. Choose either a mortar basecoat or netting cover to guard against excessive heat, moisture, and UV damage. Complete the system with a protective render topcoat. Consult our full installation guide for comprehensive step-by-step instructions.

Storage Instructions

Shelf Life: Refer to the manufacturer's expiry date. Storage Conditions: Store in a dry location, in the original packaging, and away from excessive heat or UV light.

Applications

• · External wall insulation systems:
• · Solid brick and block walls.
• · Cavity block and brick walls.
• · Thin coat rendering.
• · Cavity brick walls.
• · Cavity dense block walls.
• · Insulated render systems.
• · Steel-framed walls
• · Timber-framed walls.

Kingspan Kooltherm K5 Installation

We recommend

1. Adhesive and Base-Coat Render: EWI-225 Premium Basecoat Render Adhesive 25kg,
2. Rendering Mesh: Orange Fibreglass Rendering Mesh Roll,
3. Priming Paint: EWI-333 Top Coat Primer,
4. Top Coat Thin Coat Render: EWI-075 Silicone Render.
5. Plastic Fixings: 100mm Insulation Panel Fixings Plastic Pin,
6. Metal Fixings: 100mm Insulation Panel Fixings LMX10 Metal Pin Hammer Fix,
7. Base Track: 60mm Aluminium Base Track | 2500mm length profile,
8. Render Beads and Profiles

What is Phenolic Insulation?

Kingspan K5 Phenolic insulation, including our Kooltherm collection, ranks among the most thermally efficient insulation materials available. A specialised manufacturing process creates a rigid thermoset foam core sandwiched between two facing layers, such as low-emissivity composite foil.

Phenolic insulation enables you to reach low target U-values with minimal insulation thickness, making it perfect for projects demanding high performance and space optimisation.

Info

Explore our full Kingspan Products range and refine by thickness or coverage using the left-hand filters. For project-specific advice or bulk quotations, contact us on +4402038839057, email sales@insulationbee, or use Live Chat for the best UK Kingspan Insulation prices.