20mm White Graphite EPS External Wall Insulation

20mm White Polystyrene (Graphite) represents a premium expanded polystyrene (EPS) board featuring integrated graphite particles that deliver superior thermal performance. The graphite-enhanced composition reflects radiant heat whilst the rigid closed-cell structure traps air within each bead, effectively slowing heat transfer and maintaining indoor warmth.

Graphite particles embedded throughout the 20mm White Polystyrene (Graphite) boards create a reflective surface that bounces radiant heat back, significantly improving thermal resistance. Warm air follows a longer path through the material towards cooler zones, reducing heat loss and delivering an impressive thermal conductivity of 0.031 W/mK—outperforming standard expanded polystyrene options.

Product specification

• Brand: Ceresit / Arbet / Styropoz
• Model: 20mm EPS 70 EWI
• Thickness: 20mm
• Length: 1000mm
• Width: 500mm
• Dimensions: 1,000mm x 500mm x 20mm
• Pack Quantity: 30
• Pack Coverage: 15m2
• Pack Weight: 3kg
• Compressive Strength: 75 kPa
• Density: 10kg/m3
• R-Value: 0.48m2K/W
• Thermal Conductivity: 0.042W/mK
• Material: Expanded Polystyrene
• Profile: Square Edge
• MPN: 20mm Graphite EPS (White Polystyrene)
• Colour: White
• Fire Rating (Reaction to Fire): E
• Applications: External Wall Insulation Systems
• ETA Notification: Yes
• Features: Effectively reduce heating costs

Applications

• Balcony loggias
• Sandwich walls
• External wall insulation systems
• Framed wall surfaces
• Solid brick and block walls
• Continuous outer layers of frame walls
• Cavity block and brick walls
• Cavity dense block walls
• Thin coat rendering
• Gaps in closed or ventilated three-layer walls
• Insulated render systems
• Walls constructed using the "light wet" or "light dry" method
• ETICS (External Thermal Insulation Composite Systems)

Benefits of Expanded Polystyrene (EPS) White Insulation

1. Enhanced Thermal Performance: Graphite-infused White EPS delivers superior insulation properties, cutting heating and cooling energy demands significantly.
2. Cost-Effective: Achieves exceptional thermal performance without the premium price tag of alternative materials, offering outstanding value.
3. Lightweight: Simple to transport and fit, reducing installation complexity and labour expenses.
4. High Moisture Resistance: 20mm EPS insulation resists water absorption effectively, preserving thermal properties throughout its lifespan.
5. Durability: Maintains consistent insulating performance and structural stability across decades of use.
6. Environmentally Friendly: Often manufactured with recycled content and fully recyclable, supporting green building practices.
7. Ease of Installation: Cuts cleanly to any dimension or profile, adapting to diverse project requirements.
8. Mold and Mildew Resistant: Natural resistance to biological growth ensures healthier interior spaces.
9. Versatility: Performs reliably across walls, roofs, floors, and foundations applications.
10. Improved Fire Resistance: Selected White EPS variants include fire-retardant treatments for enhanced safety standards.
11. Low Thermal Conductivity: Minimises heat transfer efficiently, boosting building energy performance.
12. Minimal Thermal Bridging: Eliminates heat loss pathways that compromise energy efficiency.
13. Acoustic Insulation: Contributes to noise reduction, creating quieter interior environments.

Characteristics

• Lightweight construction
• Cuts smoothly with a sharp knife to any required dimension
• Excellent mold growth resistance
• Reliable durability when installed correctly
• Budget-friendly option
• Sustainable green product choice

Installation

The 20mm EPS boards attach to the substrate (masonry or timber) using mortar, adhesive, mechanical fixings, or hybrid methods. The 20mm expanded polystyrene boards require an external protective layer such as render or cladding. The board surface needs rasping or sanding to create texture before applying fiber mesh, followed by base coat or mortar application.

Certifications

Manufactured to EN-13163 Standard specifications.

More Information on 20mm White Polystyrene EPS for External Wall Insulation

• Manufacturer Link: 20mm White EPS70
• Browse our expanded polystyrene insulation range and refine by thickness or coverage using the left-hand filters. For project-specific advice or bulk pricing enquiries, contact us on +4402038839057, email sales@insulationbee, or use Live Chat—delivering competitive Rockwool Insulation pricing across the UK.