What Is a 5 cm 300 kPa XPS Board?

A 5 cm (50 mm) XPS board with a compressive strength of 300 kPa is designed to withstand approximately 30 tons/m², making it suitable for applications where both thermal insulation and mechanical strength are required.

The 50 mm thickness helps minimize thermal bridging, improves energy efficiency, and allows for straightforward installation.

Technical Specifications

PropertyValue
Thickness50 mm
Compressive Strength300 kPa (approx. 30 tons/m²)
Thermal Conductivity (λ)0.029–0.031 W/mK
Water AbsorptionLess than 0.5%
Density32–36 kg/m³
Fire ClassificationClass E (flame-retardant)
Edge ProfileSquare edge or shiplap (tongue-and-groove)
Service Life40+ years (with proper installation)

Applications

Inverted Roof Systems

Provides excellent resistance against rainfall, moisture, and temperature fluctuations.

External Wall Insulation (ETICS)

Suitable for medium-load facade insulation applications while improving building energy performance.

Floor Insulation

Helps reduce heat loss in residential, commercial, and industrial buildings.

Balconies and Terraces

Its high compressive strength makes it ideal for long-term performance under regular use.

Parking Areas and Pedestrian Zones

Designed to withstand mechanical loads in areas with moderate traffic.

Advantages

High Compressive Strength

The 300 kPa rating allows the board to support medium to heavy structural loads.

Reduced Thermal Bridging

Proper installation with sealed joints improves overall insulation efficiency.

Excellent Moisture Resistance

Its low water absorption rate ensures reliable performance even in damp environments.

Easy Installation

The lightweight structure makes handling, cutting, and installation simple.

Long Service Life

Maintains its thermal and mechanical properties for decades when properly installed.

Installation Tips

Surface Preparation

Ensure the substrate is clean, dry, and free from dust or loose materials.

Installation Method

The boards can be installed using polyurethane-based adhesives or mechanical fastening systems, depending on the application.

Joint Sealing

Seal joints appropriately to minimize thermal bridges and improve insulation performance.

UV Protection

When exposed outdoors, the insulation should be protected from prolonged UV exposure with a suitable finishing layer.

Frequently Asked Questions (FAQ)

Where can a 5 cm 300 kPa XPS board be used?

It is commonly used in inverted roofs, floor insulation, external wall insulation systems, balconies, terraces, and similar applications.

What is the difference between 300 kPa and 150 kPa XPS?

A 300 kPa XPS board provides approximately twice the compressive strength of a 150 kPa board, making it suitable for higher load-bearing applications.

Is it resistant to water?

Yes. With water absorption below 0.5%, it performs reliably in humid and moisture-prone environments.

Is a 5 cm thickness sufficient?

For many moderate climate conditions, 50 mm provides effective insulation. In colder climates or projects with stricter energy requirements, additional insulation thickness may be recommended.

A 5 cm 300 kPa XPS board is a reliable and durable insulation solution for medium-load construction applications, combining excellent thermal performance, moisture resistance, and long-term structural durability.