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Product variation and calculation of averages: - The insulation board is provided in several dimensions and thicknesses. Please use the conversion table in this EPD for other sizes and densities than the declared variant. Product description: - Expanded polystyrene (EPS) is a common material used for thermal insulation of buildings, including floors, walls and roofs. It is a polymer foam, consisting of air-filled polystyrene cells. As 98% of the material is air, EPS provides good insulating properties at a low weight. Other characteristics of the material include low moisture absorption, long service life, high compressive strength and 100% recyclable. - EPS is manufactured through permeating polystyrene beads with pentane, allowing the beads to expand when exposed to steam. This addition of a so-called blowing agent adds 4% - 6% w/w. The expanded polystyrene (EPS) beads are then fed into a block molding machine, where steam and pressure forms large blocks of EPS. The amount of EPS going into the mold determines the density of the block, where pressure class 80 (JP80) provides a compressive strength at 80 kN/m², which is approximately 15,0 kg/m³. After molding, the remaining blowing agent, pentane, is aired out and the blocks are cut into the desired shape. - The EPS boards used for exterior basement wall insulation are delivered with sharp edges, with grooves milled on one side, and covered with a non-woven fabric geotextile. - Weight per declared unit is 0,73 kg given a density of 15,0 kg/m³ with a thickness of 38 mm including non-woven fabric geotextile, glue and packaging material.