Thermaboards (PTY) Ltd is a national supply of Extruded and Expanded Polystyrene (XPS and EPS) rigid boards are used for thermal insulation. It is produced from general purpose polystyrene by the process of extrusion or expansion. We supply in EPS SHEETS *Decking Blocks / Void Fillers * Expansion Joints * Ground slab (Under surface Bed) * Cavity Wall * Inverted roof * Roof Gardens. We Supply in XPS Sheets Nail Up * Inverted Roof * Between Truss * Over Purlin Ground Slab (Under surface bed) * Cavity wall * Inverted roof