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Frequently Asked Questions When Placing an Order
What is XPS extruded polystyrene board?
XPS board is a rigid closed-cell thermal insulation material made of polystyrene resin through heating, extrusion, foaming and molding. It features excellent heat preservation, compression resistance and moisture resistance, and is widely used in floor heating, exterior walls, roofs, road bases and cold chain insulation projects.
What is the difference between XPS and EPS board?
The core difference lies in structure and performance. XPS has a dense uniform closed-cell structure with lower thermal conductivity, ultra-low water absorption, high compressive strength and better dimensional stability. EPS adopts open-cell particle structure, which is lighter and cost-effective, but inferior in waterproof and compression resistance performance.
What are the core parameters for XPS board selection?
Four key indicators shall be prioritized: thermal conductivity, compressive strength, volumetric water absorption and dimensional stability. Meanwhile, check the fire rating, closed-cell rate and environmental compliance to meet the requirements of different engineering scenarios.
What is the standard thermal conductivity of XPS board?
The thermal conductivity of high-quality national standard XPS board is ≤0.030 W/(m·K) at room temperature. For harsh scenarios such as low-temperature cold chains and roofs, high-insulation models with thermal conductivity ≤0.025 W/(m·K) are recommended for better heat insulation performance.
How about the waterproof and moisture-proof performance of XPS board?
XPS board has an ultra-high closed-cell rate and dense impermeable structure, with volumetric water absorption usually lower than 1%. It is far superior to ordinary insulation boards, hardly absorbs moisture in long-term humid, underground and roof environments, and maintains stable thermal insulation performance.
What are the common fire ratings of XPS board?
The commonly used grades in engineering are Class B1 (hardly flammable) and Class B2 (flammable). Modified flame-retardant products can be customized for scenarios with special fire protection requirements. XPS board cannot reach Class A non-combustible grade, so the selection must strictly comply with project fire codes.
What is the service life of XPS board?
Qualified national standard XPS board has a service life of 30–50 years in conventional dry environments such as indoor spaces, roofs and floor heating systems. Long-term water immersion, direct sunlight and strong corrosion will accelerate aging, so protective measures are required.
Why is XPS board necessary for floor heating?
Floor heating requires insulation materials with high compression resistance, low water absorption and stable deformation performance. XPS board can bear the load of floor backfilling and furniture, effectively block downward heat loss, improve heating efficiency, and resist moisture and mildew, perfectly adapting to the long-term closed working environment of floor heating systems.
How long is the curing period after XPS board construction?
At room temperature of about 20℃, the board shall be cured for no less than 24 hours after pasting before backfilling or finishing construction. The curing period shall be extended to 48–72 hours in low-temperature, high-humidity and rainy environments to ensure qualified bonding strength.
What is the difference between fluorine-free XPS board and ordinary XPS board?
Fluorine-free XPS board adopts environmentally friendly foaming technology, complies with the Montreal Protocol, causes no ozone layer damage and features low carbon and environmental protection, suitable for green buildings, fine decoration and export projects. Ordinary fluorine-containing XPS board has lower cost and is mostly used for ordinary infrastructure projects.