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Polystyrene sheets, also known as Styrofoam, are made from petroleum-derived hydrocarbon molecules and offer excellent insulation and structural strength. There are two types: extruded and expanded. They are commonly used for building insulation, packaging, and art projects. However, they are more expensive than other insulation materials and should be covered with fire-resistant materials when used in residential settings due to their flammability.
Polystyrene sheets are thin layers of expanded polystyrene material. These sheets are often referred to as Styrofoam® sheets after a popular branded product made from this material. This foam is made from petroleum-derived hydrocarbon molecules, which are infused with air and molded into sheets roughly the size and shape of plywood or drywall. As well as providing excellent insulating properties, these sheets also offer a degree of structural strength, making them an effective option for a wide range of applications.
Buyers can choose from two basic varieties of polystyrene sheeting, which differ in the way they are manufactured. Extruded polystyrene (XPS) sheets are made up of polystyrene beads that are melted and forced through a metal mold or die. These sheets feature a dense closed cell structure and are stiffer and stronger than other polystyrene sheets. Expanded polystyrene (EPS) sheets are made from polystyrene beads infused with air and pressed together into molds or shapes. EPS has a slightly less dense structure than XPS, making it less effective for structural applications.
One of the most common uses of polystyrene sheeting is as a form of building insulation. These panels can be installed in wall cavities or under roofing or cladding to help improve the thermal resistance between the exterior and interior surfaces. They are also used in specialized building materials, including structurally insulated panels (SIP) and insulated concrete forms (ICF). Styrofoam sheets are also used to protect goods and packages during shipping and to line refrigerators or freezers. These sheets can also be used to make signage or in art and craft projects.
While polystyrene sheets offer many benefits to users, one of the major benefits associated with this material is its excellent insulating properties. These sheets offer a much higher level of thermal resistance than traditional fiberglass or cellulose insulation products, which helps improve energy efficiency and keep heating and cooling costs in check. Despite their structural strength and durability, these panels are also easy to cut, shape, or mold using only basic tools and equipment.
Polystyrene sheets are also associated with a number of potential limitations or drawbacks. These sheets cost more than alternative insulation materials, which could impact construction budgets for homes and commercial buildings. Foam insulation sheets should also be covered by drywall or other fire resistant medium when used in a residential setting. This is due to the relatively high flammability of these petroleum-based sheets.
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