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How to Select the Right Calcium Silicate Board for Your Project: Density, Thickness & Application GuideMeta

By Belle December 5th, 2025 257 views
Calcium silicate board has become a staple in modern construction due to its exceptional fire resistance, moisture resistance, and thermal insulation properties. However, selecting the wrong type can lead to project delays, safety hazards, and increased costs. This guide will help you make informed decisions based on your specific needs.
1. Understand Density ClassificationsCalcium silicate boards are available in various densities, each designed for specific applications:
Density (kg/m³) Best For Key Properties
120-180 General insulation Lightweight, low thermal conductivity (0.05-0.07 W/m·K)
200-250 Fire protection High strength, dimensional stability
260-300 Heavy-duty industrial Extreme temperature resistance (up to 1050°C)
2. Thickness Selection Guide
  • 6-8mm: Ceiling applications, light partitions
  • 10-12mm: Commercial wall partitions, interior cladding
  • 15-20mm: Industrial insulation, exterior walls
  • 25mm: High-temperature boiler insulation, heavy-duty fire protection
3. Application-Specific Recommendations
  • Industrial insulation: Choose high-density (260kg/m³+) boards with 1000°C+ heat resistance
  • Commercial buildings: Opt for medium-density (200kg/m³) boards with A1 fire rating
  • Wet areas: Select water-resistant calcium silicate boards with special surface treatment
  • Sound insulation: Combine with rock wool insulation for enhanced acoustic performance
4. Key Performance Parameters to Check
  • Fire resistance: A1-class non-combustible (EN 13501-1)
  • Moisture resistance: Water absorption ≤10% (ASTM C1185)
  • Thermal conductivity: ≤0.07 W/m·K for insulation applications
  • Flexural strength: ≥5MPa for structural applications
5. Case Study: Steel Mill Boiler InsulationA steel mill in Germany required insulation for their 800°C boiler system. By selecting our 260kg/m³ calcium silicate boards with 1050°C heat resistance, they achieved:
  • 30% energy savings compared to traditional insulation
  • 10-year service life with zero maintenance
  • Compliance with EU industrial safety standards
ConclusionSelecting the right calcium silicate board requires careful consideration of density, thickness, and application. By following this guide, you can ensure optimal performance, safety, and cost-effectiveness. For custom solutions or bulk orders, contact our team today.
Call to Action: Need help selecting calcium silicate boards for your next project? Request a free sample or download our comprehensive product catalog now.
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