Isofoam South Africa (Pty) Ltd, was established in 1995 by the Kharafi Group of companies, with the aim of introducing IsoBoard Extruded Polystyrene (XPS) Thermal Insulation board to the South African Market. XPS offers the highest commercially available heat flow resistance of all insulation boards. IsoBoard rigid high density thermal insulation boards offer a range of applications from over-purlin to under floor slab to exposed ceilings. Simple to install, IsoBoard is water resistant, flame retardant, washable and paintable, and has the highest resistance to heat transfer. IsoBoard - for comfort and energy efficiency.