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XPS insulation boards, or extruded polystyrene insulation boards, are rigid foam panels made from polystyrene. They are known for their excellent thermal resistance and moisture resistance, making them ideal for various insulation applications. The boards are typically manufactured through an extrusion process, which creates a closed-cell structure that enhances their durability and insulation properties.
| Thermal conductivity | 0.025 to 0.035 W/m·K |
| Thickness | 20 mm to 150 mm |
| Board size | 600 mm x 1200 mm to 1200 mm x 2400 mm |
| Compressive strength | 200 to 700 kPa |
| Water absorption | Less than 0.5% by volume |
When selecting XPS insulation boards, consider the thermal resistance required for your specific application, as well as the thickness and compressive strength necessary to support any loads. It's important to specify the board size and any required certifications for building codes. Additionally, evaluate the moisture resistance needed based on the installation environment and potential exposure to water.
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The R-value typically ranges from 5 to 6 per inch of thickness.
XPS boards are made from polystyrene, which is not biodegradable, but some manufacturers offer recycled options.
Yes, XPS boards are suitable for below-grade applications due to their moisture resistance.
XPS insulation boards can last over 50 years when properly installed.
In some applications, a vapor barrier may be recommended to prevent moisture accumulation.
They can be cut to size and adhered or mechanically fastened to the substrate.