XPS: everything you need to know about extruded polystyrene

What are the pros and cons of XPS?

XPS insulation boards are closed-cell boards, consisting of millions of very small cells pressed together with air or gas. This make-up results in numerous benefits such as &#;

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• excellent lambda value
• high compressive strength
• water repellent
• exceptionally lightweight
• limited thickness
• wide variety of applications
• rot resistance
• long lifespan
• reliability

As XPS insulation is 100% recyclable, it is ideal for circular construction projects.

As is the case for most insulation types, fire classification is not a strong point of XPS, which has a Euroclass E rating. XPS is classified as unrestricted in the UK (meaning that it can be used within any distance to other buildings) when it is used in inverted roofs.

Polystyrene foam insulation board, also known as EPS board, is a white object from polystyrene beads containing a volatile liquid blowing agent after heating advance, heated in the mold and molding.

The EPS board provides an R-Value of 4 per inch of thickness and is the cheapest type of foam board insulation. EPS board is used under roofing, over foundation walls, and beneath the siding.

Because of its resistance to moisture, polystyrene foam board insulation is a great choice whenever and wherever there is a chance it could get wet, such as an exterior foundation, inside a basement against the foundation, and on the outside of a house beneath a house wrap. The following are the pros and cons you should know when choosing the EPS insulation board.

Advantages of Polystyrene foam insulation board

1 Light. The bulk EPS density of Chinese standard is 18~22kg/m3, people in Europe only use the EPS board with a density of 15kg/m3;

2 Low thermal conductivity. Because of the air-filled hole group structure, the spread of air and the heat conduction coefficient can be prevented under 0.039;

3. Good anti-impact ability. 98% of foam insulation board space is filled with air, then it has sufficient capacity to buffer the impact of the outside world by changing the shape;

4. Low water absorption. Studies have shown that humidity will affect the thermal and mechanical properties, and the low water absorption of EPS insulation board helps to maintain excellent properties;

5 Recyclable. Polystyrene foam insulation board has the highest recycling degree among the plastics;

6. Freon is not used in the production process;

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7. EPS insulation board has the lowest energy consumption of the entire plastic life cycle.

Disadvantages of polystyrene foam insulation board

1. EPS insulation board needs to be hung, and the construction is complicated and the cycle is long;

2. Flammable & toxic. Ordinary polystyrene foam insulation board is easy to burn, accompanied by toxic fumes;

3. Poor material strength. Polystyrene foam insulation board is prone to cracking and shedding.

4. Limited strength and load-bearing capacity.

5. Unstable quality. The EPS insulation board needs to be placed in the factory for a period of time before it can be used after maturity. If it is not cooked thoroughly, the quality will not be guaranteed, resulting in foam shrinkage and cracking.

GreenMax Polystyrene Recycling Machine

In comparison, the polystyrene foam insulation board has more advantages, but the disadvantages are more fatal. At present, the trend of eliminating polystyrene foam insulation boards has gradually appeared in the market. If EPS foam waste is not handled properly, it is easy to cause white pollution.

GreenMax is a veteran of recycling waste EPS insulation board. The polystyrene recycling machine APOLO Series can compact waste polystyrene foam insulation and the tight compacted EPS blocks. With the help of the polystyrene compactor, the EPS waste is much easier to handle and the storage space and transport costs can be greatly saved.

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