Is Polystyrene Insulation a Good Insulator?

With thermal conductivity values ranging from 0.034 to 0.038 W/m·K for EPS and around 0.030 for XPS, it delivers reliable energy savings at a price point that works. Better still, XPS offers high compressive strength and moisture resistance - making it a smart choice for foundations, flat roofs, and floors.

Are Polystyrene Insulation Boards Good For Compressive Strength?

Kingspan GreenGuard boards have a compressive strength of 300 kPa, whereas EPS70 polystyrene boards have a compressive strength of 70 kPa. The higher the compressive strength, the longer the material maintains its properties. GreenGuard boards perform well when they are installed in heavy roof structures and underneath heavy floors. Many commercial property owners invest in polystyrene foam because it maintains its thermal properties despite heavy footfall.

What Does the Number in the Title of Each Expanded Polystyrene Board Indicate?

The number signifies the compressive strength. For instance, EPS70 has a compressive performance of 70 Kilopascal (kPa).

Why Is Compressive Strength Important When Selecting Polystyrene Foam Insulation?

Compressive strength is vital as it determines the load resistance of the material. A higher compressive strength means the insulation can withstand more external pressure.

Do XPS Foam Boards Also Have Numbers in Their Titles? What Do They Indicate?

Yes, like EPS, XPS foam boards have numbers. For example, all XPS products in our range have a compressive strength of 300kPa, indicating they can withstand greater pressure.

Which Is More Suitable for Commercial Spaces: EPS or XPS?

XPS is more recommended for commercial spaces due to its higher compressive strength, making it ideal for insulating heavy floors and roofs.

Are Polystyrene Insulation Boards Sustainable?

Unlike XPS, EPS can be constructed with recycled content, making it the more environmentally friendly option of the two. However, this sustainability does not come without its disadvantages. The voids between the polystyrene beads of EPS also make it more permeable and susceptible to water absorption. And with the absorption of water, comes the dreaded decrease of R-Value (dulling down its already quite low thermal properties). Resisting water is critical for high-performance insulation due to the fact that water is an excellent conductor of energy. Water ingress will ultimately hurt the overall thermal effectiveness of the board since water allows energy to short circuit or bypass its way through the board’s structure; reducing the overall effectiveness of thermal performance.It should be noted then, that EPS’ potential to absorb water is 10 times greater than XPS, which does not absorb water at all, due to its closed-cell structure. This enables it to maintain insulating power in the presence of water.

              
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Home Insulation Material Type Polystyrene Insulation

Polystyrene Insulation Board

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50mm EPS150 Polystyrene Insulation Board 2400mm x 1200mm

£16.88 with bulk pricing

±12 Sold in multiples of 12

75mm EPS150 Polystyrene Insulation Board 2400mm x 1200mm

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Polystyrene Insulation Board

50mm EPS150 Polystyrene Insulation Board 2400mm x 1200mm

75mm EPS150 Polystyrene Insulation Board 2400mm x 1200mm

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