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Rockwool Board

Rockwool Board

High Strength - Compression Resistant Rockwool board

The high strength rockwool slab, applies to the exterior of buildings for thermal insulation, like roof, external wall etc.. due to its property of compression resistance, it’s suitable for steel sandwich panel’s fabrication as well, and other industries where both insulation and mechanical strength are required.

There are various grades available, 30kpa, 40kpa, 50kpa, 60kpa etc.Properties: comply with ASTM C 612 / JIS A 9504.

Items Value
Density tolerance, % +15, -15
Shot content(dia.≥0.25mm). % ≤12.0
Average fiber diameter, μm ≤7.0
Heat load contraction Temp.
(products with density over 60kg/m3) oC
≥600
Thermal Conductivity
(average temperatur70oC±52oC), W/(m.k)
≤0.044
Moisture content, % ≤0.5
Combustion property Grade A Incombustible
Organic substance, % ≤4.0
Water repellence (water-proof), % ≥98

Availability of rockwool slab

Compression Resistance Density(kg/m3) Thickness(mm)
30Kpa
(against 10% of dimension compressed)
120 100~120
130 80~100
140 50~80
40Kpa
(against 10% of dimension compressed)
140 80~100
150 50~80
160 30~80
180 25~70
50Kpa
(against 10% of dimension compressed)
150 80
160 50~80
180 30~70
200 25~60
60Kpa
(against 10% of dimension compressed)
160 60~80
180 30~70
200 25~60
Rockwool Slab

Rigid rockwool board

The product is suitable for large vessels, tanks, ovens and ducts for its good load-bearing property.

Board with wire mesh, kraft paper or aluminium foil facing is available.

They are water repellent and non-hygroscopic.

The wool is neutral or slightly alkaline, and normally not support the growth of molds, fungi and bacteria.

Flexible, semi-rigid rockwool board

The product is used in building walls/ roofs, elevator wells, flat or slightly curved surfaces and other industrial equipment for thermal and sound insulation.

Availability of rockwool board/ slab

Flex semi-rigid board; Rigid board
Thickness 40 50 60 80 100 120 140 150 200
(mm) kg/m3
25                  
30                  
35                  
40                  
50                  
65                  
70                  
75                  
80                  
90                  
100                  
110                  
120                  
130                  
140                  
150                  
Length (mm) 910 1000 1200 1210
Width (mm) 600 605 630 910

Other size or density on request .

Thermal conductivity of rockwool board/ slab (typical figure)

Mean Temp(oC) K-value (W/m.k)
Thickness 40 50 60 80 100 120 140 150 200
mm kg/m3
50 0.043 0.041 0.039 0.038 0.037 0.037 0.037 0.037 0.039
100 0.054 0.049 0.046 0.044 0.043 0.042 0.043 0.042 0.045
150 0.068 0.061 0.058 0.053 0.051 0.050 0.049 0.049 0.052
200 0.086 0.074 0.071 0.064 0.060 0.059 0.057 0.057 0.060
250 0.106 0.090 0.088 0.076 0.071 0.069 0.066 0.066 0.069
300 0.131 0.109 0.106 0.091 0.084 0.082 0.081 0.080 0.079
350   0.131 0.127 0.107 0.099 0.096 0.095 0.094 0.090
400       0.126 0.107 0.111 0.109 0.107 0.102

Maximum Service Temperature

  • Flexible, semi-rigid boards: 450oC (850oF);
  • Rigid boards: 650oC (1200oF)

Sound Absorption of rockwool board/ slab

Hz Flexible, semi-rigid board
(Thickness 75mm)
Rigid board
(Thickness 75mm)
125 0.32 0.30
259 0.80 0.80
500 1.13 1.15
1000 1.09 1.12
2000 1.01 1.03
4000 1.02 1.02