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The insulation board is provided in several dimensions and thicknesses. Please use the conversion table below for other sizes than the declared unit. Extruded polystyrene (XPS) is a common material used for thermal insulation of buildings and constructions. Its a polymer foam, consisting of airfilled polystyrene cells. As most of the material is air, XPS provides good insulating properties at a low weight. Other characteristics of the material include low moisture absorption, long service life and high compressive strength. This LCA is based on Jackofoam 300 and can be used for all Jackofoam products with the conversion factor which can be found under System boundaries. XPS is manufactured through an extruder where polystyrene granulates are mixed with additives and foaming agents to produce the foam mass. The foam mass is pressed out flat to a board through a nozzle in deisre thickness and cut into correct dimensions. Some of the remaining blowing agents are aired out before the product leaves the factory gate. The number of the product is the pressure class; here 300 which means a short dermation of 10% when the load of the product is 300 kN/m2. Weight per declared unit is 1,3807 kg given a density of 31,5 kg/cubic meter with a thickness of 34 mm including non woven fabric geotextil and packaging material.