Standard grade polystyrene weighs 13kg per cubic meter.
VH grade polystyrene weighs 26kg per cubic meter
Isoboard weighs approximatly 32 kg per cubic meter
No more nails or and other water based adhesive is perfect for gluing polystyrene to other surfaces.
Polystyrene disolves when anything solvent based is applied to it.
Water based paint is used to paint polystyrene.
1 cubic meter of standard grade polystyrene will support up to 970 kilos of weight when placed in water. The calculation is 1 cubic meter to hold 1000 kilos minus the weight of the polystyrene.