Expanded polystyrene insulation boards are a type of rigid insulation widely applied to all sorts of insulation like walls, floors and roofs insulation. They are not the only kind of rigid insulation, since you can also opt for so-called PIR boards or phenolic boards, always depending on the area you are insulating and the same insulation method. Before opting for either, you will need to know some basic properties and applications of polystyrene insulation boards.

Features of the polystyrene insulation:

Due to their rigid structure, polystyrene insulation boards are solid and resistant, so they will properly seal the area they are applied to, forming another protective layer to your home. Another good news is their water resistance which makes them mostly applicable to spaces where water penetration is a significant problem, since other types of insulation may get wet and damp over time and lose their insulation ability. Although resistant, the boards are very easy to transport and cut by using nothing more than a utility knife. It will allow you to adjust their size and shape to any area you are attaching them on, which comes in handy when insulating your internal walls. 

Because expanded polystyrene insulations are not heated absorbent or heat resistant, they might not be the best choice for individual commercial buildings exposed to higher temperatures and thus greater fire risk but are quite suitable for residential settings. Another potential downside for those of you environmentally conscious is the fact that these boards are not listed among eco-friendly insulation materials, being non-recyclable and non-biodegradable. Another thing to keep in mind is their price which is usually higher than with other insulation products, but not to worry since their cost is often compensated with their excellent thermal and acoustic insulation performance.

Detail of expanded polystyrene insulation:

The boards consist of colourless plastic polystyrene which has to necessary forms, as expanded and extruded polystyrene. Expanded polystyrene insulation has a lower density and thus somewhat less insulation power than extruded polystyrene. Expanded polystyrene board is made by extending the beads, exposed to high temperatures and afterwards pressured, so the given result is a resistant and hardboard consisting of beads and a bondage agent. On the other hand, the manufacturing process of extruded polystyrene boards begins with melting thus converting polystyrene crystals into a plastic fluid, under controlled temperatures and pressure. The plastic is then moulded, cooled and expanded into foam which can be easily cut and shaped.

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