The most commonly used and cost-effective density range in metal roofing systems is 120 kg/m³ to 150 kg/m³. For high-demand scenarios, a density of ≥ 160 kg/m³ is recommended. Additionally, the thickness is not arbitrarily selected but is determined by the building energy efficiency standards and local climate zone of the project. The common thickness range is 50mm to 100mm.
I. ISOKING Roofing Rock Wool Board
The interwoven rock fibers within the roofing rock wool board prevent air circulation, forming a thermal barrier layer.
Winter: Prevents heat loss through the roof, reducing heating costs.
Summer: Effectively insulates against solar heat, preventing excessively high indoor temperatures and reducing air conditioning energy consumption.
Grade: Class A non-combustible material
II. Recommended Density and Thickness
Recommended density range for general roofing: 120 kg/m³ ~ 200 kg/m³
Rock wool boards at this density have good compressive strength, meeting the requirements of most roofing construction and use. For high-requirement roofs, a density of ≥ 160 kg/m³ is required.
Core Principle: Low-density (e.g., below 100 kg/m³) rock wool boards are not recommended for roofing due to insufficient strength, susceptibility to damage during construction and use, poor wind pressure resistance, and potential safety hazards.
Recommended Thickness
Common Thickness Range: 50mm ~ 100mm.
Reference Suggestions:
Mild/Hot Summer/Cold Winter Regions: 50mm ~ 80mm is commonly used.
Cold/Extremely Cold Regions: 80mm ~ 120mm or thicker is typically required.
