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Extruded polystyrene (XPS) is the ideal product for the insulation of buildings (roofs, facades, floors), it provides optimal thermal insulation against cold and heat. Thanks to the high insulating power of XPS, buildings are energy efficient, since they allow great energy savings, maintaining the maximum level of comfort inside at any time of the year.
Extruded, extruded or extruded polystyrene, is a rigid foam resulting from the extrusion of polystyrene in the presence of a foaming gas, used mainly as thermal insulation. It is similar to EPS but with other properties. Normally it is served tongue and groove, in plates.
Extruded polystyrene shares many characteristics with expanded polystyrene, as its chemical composition is identical: approximately 95% polystyrene and 5% gas. The difference lies solely in the shaping process; but it is a crucial difference, since extrusion produces a closed bubble structure, which makes extruded polystyrene the only thermal insulator capable of getting wet without losing its properties.
XPS has a typical thermal conductivity between 0.025 W/mK and 0.040 W/mK, although there are polystyrenes with values up to 0.029 W/mK. XPS has low water absorption (less than 0.7% at total immersion) and very high mechanical performance (between 200 kPa and 700 kPa). It has a bulk density between 30 and 33 kg/m³. Extruded polystyrene also has excellent thermal resistance, between laying with an "R" value of 5 per inch (with a difference +/-10%). Low water absorption and resistance to freeze-thaw cycles make it an ideal material for roofs where the insulation is immediately below the tile. On the other hand, its great mechanical resistance allows loads to be supported on the insulation (weight of tiles, snow, water, etc.). It can be used as insulation in partition walls and on roofs (sheet metal panels).
Due to its high mechanical resistance and its tolerance to water, it is a material that has found many applications in construction. It is widely used as insulation in floors, especially in cold rooms, and also in façade panels; but above all, it has allowed the appearance of a new constructive solution: the inverted roof. In this type of roof, the thermal insulation is placed on top of the waterproofing, an arrangement that extends the useful life of the roof, since the waterproofing does not suffer the stresses of the weather or sudden changes in temperature that end up deteriorating it over time. .
Extruded polystyrene is marketed in sheets a few centimeters thick, which can be smooth-edged or well-cut into half-wood. However, due to its lightness, it is necessary to ballast it to prevent it from being sucked in by the wind, so the most common inverted roofs place gravel or various types of slabs as the final finish.
Extruded polystyrene (XPS) is the ideal product for the insulation of buildings (roofs, facades, floors), it provides optimal thermal insulation against cold and heat. Thanks to the high insulating power of XPS, buildings are energy efficient, since they allow great energy savings, maintaining the maximum level of comfort inside at any time of the year.
