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Polystyrene EPS Graphite 20mm – High-Performance Thermal Insulation Board
Polystyrene EPS Graphite 20mm is a high-performance thermal insulation board designed for modern construction and external wall insulation (EWI) systems. Thanks to graphite technology, this EPS board offers enhanced thermal efficiency, helping to reduce heat loss and improve energy performance in residential and commercial buildings.
Lightweight, durable and easy to install, graphite EPS insulation boards are widely used across the UK construction industry for both new builds and renovation projects.
Key Features & Benefits
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✅ Graphite-enhanced insulation performance
Advanced graphite particles reflect heat radiation, delivering better thermal efficiency than standard white EPS. -
✅ Low thermal conductivity (λ ≈ 0.033 W/mK)
Provides effective insulation while allowing thinner construction layers compared to traditional EPS boards. -
✅ Lightweight & easy to work with
Simple to cut, shape and install using standard tools, reducing labour time on site. -
✅ Moisture-resistant closed-cell structure
Helps prevent water absorption, mould growth and long-term material degradation. -
✅ Cost-effective thermal solution
Excellent balance between insulation performance, durability and price.
Applications
Polystyrene EPS Graphite 20mm insulation boards are suitable for a wide range of construction uses, including:
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External Wall Insulation (EWI) systems
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Insulation under render and façade systems
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Internal wall insulation
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Timber frame construction
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Retrofit and refurbishment projects
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Residential and commercial buildings
Technical Specifications
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Material: Expanded Polystyrene (EPS) with graphite
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Thickness: 20mm
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Thermal Conductivity (λ): approx. 0.033 W/mK
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Colour: Grey (graphite)
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Board Type: Rigid insulation board
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Installation: Mechanical fixings and/or adhesive (depending on system)
Typical values – exact specifications may vary by batch.
Why Choose Graphite EPS Insulation?
Compared to standard white EPS, graphite EPS insulation boards can offer up to 20% better thermal performance at the same thickness. This makes EPS Graphite 20mm an ideal choice where space efficiency, energy savings and compliance with modern building standards are essential.
Suitable for UK Building Standards
Graphite EPS insulation boards are commonly used in UK-approved EWI and insulation systems, helping to meet energy efficiency targets while keeping installation costs under control.