downloadIsoBoard is a rigid,  high density, extruded polystyrene, manufactured in different thicknesses and lengths to meet almost any building thermal insulation requirement in the temperature range -30 to +60 °C.

IsoBoard has board of Agrèment SA certificate for five popular applications, which certify IsBoard is fit for use as recommended. IsoBoard is without doubt the most versatile thermal insulator available.

Thermal insulation provides a barrier to heat transfer, which keeps heat energy on one of the board or the other. Insulation does not, of itself, provide heating or cooling, but rather controls where heat energy should be, either inside or outside.

Advantages if IsoBoard

cropped-IMGP4328-Copy7.jpgThe advantages of IsoBoard are in its effectiveness as a thermal insulator, ease of installation, high compressive strength, resistance to moisture and excellent performance in fire situations. The board is extremely durable and will last for the life of the building, with minimal drop off in thermal performance.

IsoBoard can be painted with water based paints when used in exposed applications, and washed to clean if necessary.


Thermal Conductivity of IsoBoard


the thermal conductivity (k Value) of 5 year aged IsoBoard at 90% relative humidity is 0.03 W/m °C. This K value for both aged and wet IsoBoard is

termed the “design value” used when performing heart flow calculations for building elements employing IsoBoard Insulation. NB the “design value” is the worst case expected conductivity of IsoBoard at the end of the building’s useful like. you can rely on this value! The thermal resistance ( R Value) if IsoBoard is calculated by dividing the thickness of the IsoBoard by the design k-Value, to achieve the following table:


Fire Performance:

fireTestIsoBoard is Classified as B/B1/2/H&V in terms if SANS 428. This means that although the board is combustible, it poses no flame spread hazard and can be used in any building type in a horizontal or vertical application, both with and without sprinklers, with the exception of regulated buildings requiring non-combustible materials, such as hotels and hospitals. 

Exposed to fire, IsoBoard shrinks away from the heat source. There are no flaming droplets, and no flame spread. The gases released as a product of combustion are less toxic than burning wood.