Isoboard
IsoBoard extruded polystyrene rigid foam thermal insulation, has closed cells with common sides and is produced on a continuous, fully automated extrusion process, in accordance with international and South African specifications and standards.
- High resistance to heat flow i.e. low thermal conductivity.
- Resistance to water vapour diffusion and water absorption.
- Uniform density distribution.
- Very high compressive strength.
- Ageing resistance.
- Resistance to bacteria and Micro-organism growth.
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Standard |
Conditions |
IsoBoard |
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| Density (2) |
ISO 845; 1988 |
FDIS4898 |
34-36kg m3(± 10%) |
| Compressive Strength (5) |
ISO 844; 1978 |
10% Strain |
160-310 kpa |
| Water Vapour Permeability (2) |
ISO 1663; 1981 |
38∞C / 88%RH |
0.78 ng/Pa.s.m |
| Water Absorbtion |
ISO 2896; 1997 |
24 hr @ 50 mm |
0.20% by volume |
Coefficient of Linear (2)
Thermal Expansion |
ISO 4897; 1985 |
-10 -> 60∞C |
0.067mm per m |
| Dimensional Stability |
EN1604 |
-10 -> 60∞C |
< 1.0% |
Thermal Conductivity (3)
(Average of two tests) |
ISO 8302; 1991 (F) |
20∞C mean temp.
Dry and 90 day aged 0.024 W/m∞C |
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Long Term
Thermal conductivity |
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Five year aged |
0.028 W/m∞C |
| Recommended design value |
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90% RH |
0.030 W/m∞C |
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