The extruded board has good heat preservation and compression performance, and its moisture-proof and anti-corrosion performance is also very good. It mainly plays the role of heat preservation and heat insulation and is used in building roofs, building grounds, and high-speed railway subgrades. A good extruded board is not only of good quality but also meets the customer's requirements. So what issues should be paid attention to when choosing an extruded board? 1. It is necessary to clarify the size and model of the extruded board to be purchased. 2. You must be clear about the quantity you need to buy and don't buy some extruded boards of inferior quality for cheap. 3. When buying, look at the appearance and color. There are extruded boards in many colors on the market. Please pay attention to choosing a board with a smooth and delicate appearance and pure color. 4. We need to buy extruded boards with uniform surface layer and cells. The more uniform the cells, the