The Ultimate Guide to Choosing XPS Board

XPS is extruded polystyrene, a type of foamed polystyrene board that is intended for insulation purposes. Conventionally, foamed polystyrene boards are known as EPS. So, how do we distinguish them? Hence, the letter X was chosen to emphasize the extrusion process that is required for production. Other examples include XEPS (extruded expandable PS beads), XPET (extruded foam PET) etc.

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XPS is undergoes a continuous extrusion process, during which the physical blowing agents are injected into the molten PS. The mixed PS, blowing agents, and other additives are subsequently cooled by the cooling extruder. As the result, the pressurized and viscous molten material are extruded through the slot die. When the material exudes from the slot die, pressure is released, and the foaming process initiates. The foamed material will pass through the calibration system to embody shapes and models.

ComparisonsExpanded Polystyrene (EPS)Extruded Polystyrene (XPS) Raw materialsPolystyrene resinPolystyrene resin Manufacturing processPolystyrene (PS) initially expands, and then it is molded to form a close cell material.PS and other ingredients are mixed and fed into the extruder with blowing agents injected. The rigid foam board is extruded and expands through the slot die. Thermal conductivity (W/m·K) ≤0.042≤0.030 Compressive strengthUp to 400KpaUp to Kpa Water absorption ％ (v/v)≤4≤2 SizeWidths: up to mm
Lengths: up to 400mm
Thicknesses: up to 90mmWidths: 600mm, 900mm, mm
Lengths: mm
Thicknesses: 20 to 150mm

The biggest difference between EPS and XPS is cell structure, that results in EPS having worse (higher) water absorption and worse (lower) R-value per inch.

Extruded Polystyrene (XPS) rigid foam insulation has very well defined, uniform closed cells with continuous walls. The combination of hydrophobic (water-resistant) polystyrene polymer and closed cell walls results in a very low water absorption rate for XPS rigid foam insulation.

There are hundreds of XPS brands all over the world.

Below we list some global brands or brands that have a higher reputation in certain regions. For your reference when choosing XPS board.

The Kingspan Group was formed in the mid s in Ireland and today is one of the world’s leading construction product manufacturers.

Kingspan GreenGuard® XPS insulation board offers an R–value of 5.0 per inch of thickness and is ideal for a variety of applications including below slab, below grade along the foundation, inside basement walls, exterior insulation over wood sheathing and residing.

The Ultimate Guide of XPS Foam Board

XPS (Extruded Polystyrene) foam board is a versatile building material with a wide range of applications, known for its insulation properties and durability. Whether you're a DIY enthusiast or a construction professional, this comprehensive guide will provide valuable insights into the features, uses, and benefits of XPS foam boards.

1. What is XPS Foam Board?

XPS foam board is a rigid insulation board made from polystyrene resin through an extrusion process. It is known for its closed-cell structure, providing excellent thermal insulation. The manufacturing process results in a lightweight, moisture-resistant, and durable material suitable for various construction and insulation applications.

2. Key Features of XPS Foam Board

Understanding the key features of XPS foam board is crucial for its effective use. These features include high thermal resistance (R-value), resistance to moisture absorption, low weight, and dimensional stability. Additionally, XPS foam boards have high compressive strength, making them suitable for load-bearing applications.

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3. Common Applications

XPS foam boards find applications in both residential and commercial construction. Common uses include insulation for walls, roofs, and floors, as well as in the creation of model scenery, signage, and craft projects. The material's versatility and ease of cutting make it a favorite among builders and DIY enthusiasts alike.

XPS Foam Boards

4. Installation Tips

Proper installation is crucial for maximizing the benefits of XPS foam board. Ensure a clean and dry surface before applying adhesive for secure attachment. Pay attention to joints and seams to maintain a continuous insulation barrier. Use compatible materials for sealing gaps and edges to enhance the overall insulation performance.

5. Advantages of XPS Foam Board

XPS foam boards offer several advantages, including high thermal efficiency, moisture resistance, and resistance to mold and mildew. Their lightweight nature facilitates easy handling and installation. The material's durability ensures long-term performance, making it a cost-effective choice for various construction projects.

Frequently Asked Questions

Q: Can XPS foam boards be used for outdoor applications?

A: Yes, XPS foam boards are suitable for outdoor applications. They are resistant to moisture and provide effective insulation for exterior walls, roofs, and foundations.

XPS Foam Boards

Q: Can XPS foam boards be cut to specific sizes?

A: Yes, XPS foam boards can be easily cut to specific sizes using a utility knife or a saw. This flexibility makes them adaptable to various construction needs.

Q: Is XPS foam board environmentally friendly?

A: XPS foam board is not biodegradable but can be recycled. Check with local recycling facilities to ensure proper disposal and recycling of the material.

Armed with knowledge about the features, applications, and advantages of XPS foam boards, you can confidently integrate this versatile material into your construction projects, ensuring energy-efficient and durable results.

Kendall Cold Chain System XPS Foam Board or Extruded Polystyrene Foam Board is the end product of polystyrene resin, raw materials, polymers, and catalyst which are heated and mixed simultaneously. Then extrusion and molding of this mixture are cooled into a rigid foam plastic board. They exhibit remarkable features such as low water absorption, low thermal conductivity, high compressive resistance, and no aging these attributes make it extremely appealing in the market.