İzocam XPS and EPS Boards: Choosing the Right Thermal Insulation Solution

Two of the most widely used insulation materials in modern construction for energy efficiency are İzocam XPS Boards and İzocam EPS Boards. Both provide effective thermal insulation; however, their structural differences and application areas determine which product is the most suitable choice.

1. İzocam XPS Board (Extruded Polystyrene Foam)

Structure:

Homogeneous, produced using the extrusion process

Features:

• High compressive strength
• Extremely low water absorption

Applications:

• External thermal insulation systems (ETICS)
• Terrace roofs and pitched roof insulation
• Foundation and basement wall insulation
• Cold storage facilities
• Underfloor heating systems

Advantage:

XPS is highly resistant to moisture and offers superior mechanical strength, making it ideal for below-ground and high-load applications.

2. İzocam EPS Board (Expanded Polystyrene Foam)

Structure:

Cellular, expanded polystyrene beads

Features:

• Cost-effective solution
• Lightweight structure
• Carbon-enhanced versions offer improved thermal performance

Applications:

• External façade insulation (ETICS)
• Interior wall insulation
• Suspended ceiling systems
• Lightweight filling material

Advantage:

EPS is more economical and lightweight, allowing fast and efficient installation over large surface areas.

3. Differences Between XPS and EPS

Note: Graphite-enhanced EPS can reach thermal performance levels closer to XPS.

4. Technical Specifications

İzocam XPS:

• Thermal Conductivity: 0.030 – 0.035 W/mK
• Density: 30–50 kg/m³
• Fire Classification: E (can be improved with coatings)
• Water Absorption: 0.2% – 0.5%

İzocam EPS:

• Thermal Conductivity: 0.035 – 0.040 W/mK
• Density: 10–30 kg/m³
• Fire Classification: E (optional B1 or improved grades available)
• Water Absorption: 2% – 4%

5. Pricing

Prices vary depending on thickness (20–100 mm+), density, graphite content, order volume, and delivery conditions. In general, EPS is more economical, while XPS is a higher-performance solution.

6. Why Choose İzocam?

• Trusted brand in Türkiye’s insulation industry
• TSE and CE certified production
• Wide product range and easy application
• Energy efficiency and reduced carbon footprint

Frequently Asked Questions (FAQ)

1. Which is better: XPS or EPS?
It depends on the application. XPS is recommended for foundations and moisture-exposed areas, while EPS is ideal for façades and interior applications.

2. Does XPS absorb water?
No. It has extremely low water absorption.

3. Is EPS effective despite being cheaper?
Yes. With proper thickness and density, it provides efficient thermal insulation.

4. What is graphite EPS?
Graphite (carbon-enhanced) EPS offers 15–20% better thermal performance compared to standard EPS.

Conclusion

İzocam XPS and EPS boards are high-performance thermal insulation materials designed for different construction needs. The correct choice depends on application area, exposure to moisture, and project budget, ensuring optimal energy efficiency and building performance.