Why XPS Needs Surface Treatment & Are You Aware of the Advantages?​

Due to the extremely smooth surface of the XPS board, during the construction process, the smooth surface is not easy to adhere to the mortar, and it cannot bond well with the surface to be constructed. Therefore, some pre-treatment is carried out on the surface of the XPS to achieve better adhesion.

• ​Core Purpose:​​ All surface treatments fundamentally address ​​the poor bonding performance of the smooth skin​​.
• ​​Most Common Processes:​​ ​​Fluting​​ and ​​Planing (often including Sanding)​​ are currently the most widely used and reliably effective methods.
• ​​Embossing​​, as a relatively efficient process, also offers good results and is easily integrated into production lines.
• ​​Selection Considerations:​​ The specific treatment chosen depends on factors like required bond strength, application scenario (e.g., exterior walls, roofs, floors), cost, and available production equipment. High-performance ETICS typically prioritizes ​​fluted or planed boards​​.

For optimal selection during specification, it is highly recommended to request samples of boards with different surface treatments from suppliers, or to ask for pull-off strength test reports corresponding to the specific treatment methods. This allows for the best choice based on the specific project requirements.