40mm Grey Polystyrene EPS External Wall Insulation

40mm Grey Polystyrene (Graphite) is a premium expanded polystyrene (EPS) board featuring integrated graphite particles that deliver a distinctive grey appearance. The graphite infusion enhances thermal performance by up to 20% compared to standard 40mm white EPS insulation boards of equivalent thickness. This rigid closed-cell EPS formulation traps air within each bead, and because air resists heat conduction effectively, it substantially reduces heat transfer rates.

The graphite particles embedded throughout the 40mm Grey Polystyrene (Graphite) structure create a reflective surface and striking dark grey finish. When radiant heat passes through the 40mm graphite insulation, multiple reflections occur, dramatically slowing heat movement and boosting overall energy efficiency.

Within 40mm Grey Polystyrene (Graphite) boards, warm air travels an indirect path toward cooler zones, which decelerates heat transfer and maintains interior warmth. This design achieves superior thermal conductivity of 0.031 W/mK, outperforming conventional 40mm expanded polystyrene boards.

Product specification

• Brand: Ceresit / Arbet / Styropoz
• Model: 40mm EPS 70 EWI
• Thickness: 40mm
• Length: 1000mm
• Width: 500mm
• Dimensions: 1,000mm x 500mm x 40mm
• Pack Quantity: 15
• Pack Coverage: 7.5m2
• Pack Weight: 4.50kg
• Compressive Strength: 70 kPa
• Density: 15kg/m3
• R-Value: 1.29m2K/W
• Thermal Conductivity: 0.031W/mK
• Material: Expanded Polystyrene
• Profile: Square Edge
• MPN: 40mm Graphite EPS (Grey Polystyrene)
• Colour: Grey ǀ Graphite
• 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) Grey Insulation

1. Enhanced Thermal Performance: Graphite particles integrated into grey EPS significantly boost insulation properties, lowering energy demands for heating and cooling.
2. Cost-Effective: Delivers outstanding performance at a competitive price point compared to alternative insulation solutions, offering excellent value.
3. Lightweight: Simple to transport and fit, reducing installation labour and timeframes.
4. High Moisture Resistance: 40mm EPS insulation resists moisture penetration effectively, preserving thermal properties throughout its lifespan.
5. Durability: Robust material that retains insulating performance and structural stability over decades.
6. Environmentally Friendly: Often manufactured with recycled materials and fully recyclable, supporting green building practices.
7. Ease of Installation: Cuts cleanly to match any dimension or profile, offering flexibility across diverse project types.
8. Mold and Mildew Resistant: Natural resistance to fungal growth supports healthier interior spaces.
9. Versatility: Performs well across multiple applications including walls, roofs, floors, and foundations.
10. Improved Fire Resistance: Many grey EPS variants incorporate fire-retardant treatments for enhanced protection.
11. Low Thermal Conductivity: Minimises heat transfer efficiently, maximising building energy performance.
12. Minimal Thermal Bridging: Substantially reduces thermal bridging risk, preventing heat loss and lowering energy expenses.
13. Acoustic Insulation: Contributes meaningful sound insulation qualities, creating quieter interior environments.

Characteristics

• Lightweight
• Easily cut with a sharp knife to any size and shape
• High resistance to mold growth
• Highly durable when used according to specifications
• Cost-efficient
• Environmentally friendly Green Way product

Installation

The 40mm EPS boards are secured to the substrate (masonry or timber) using mortar/adhesive, mechanical fixings, or a hybrid approach. The 40mm expanded polystyrene boards require an outer protective layer, such as render or siding. The board surface must be rasped or sanded to achieve a textured finish before applying fiber mesh, followed by base coat or mortar application.

Certifications

Manufactured to EN-13163 Standard specifications.

More Information on 40mm Grey Polystyrene EPS for External Wall Insulation

• Manufaturer Link: 40mm grey EPS70
• Browse our Rockwool Insulation range and refine by thickness or coverage using the left-side filters. For product suitability advice on your specific project or bulk pricing enquiries, contact us on +4402038839057 , email sales@insulationbee or use Live Chat - Lowest UK Rockwool Insulation Prices.