What are the two types of backer board?

　　What are the two types of backer board? It can be analyzed as follows:

　　Waterproof gypsum board: This type of board has a certain waterproof effect in the short term, but if it is soaked in water for a long time, it may become moldy and damp. If the waterproof gypsum board has become moldy and damp, even after drying treatment, it may not be able to fully restore its original performance. Therefore, it is not recommended to use it immediately in such cases.

　　2. High-performance Insulating and Waterproof New Material: This material has excellent waterproof and moisture-proof performance, effectively preventing water penetration. It also features insulation, heat insulation, sound insulation and noise reduction. If this material does not expand or absorb water after soaking and remains dry after drying treatment, it can be considered that its performance has not been greatly affected and can be used immediately.

　　The common types and specifications of backer boards are as follows:

　　Type

　　Multi-layer composite structure: This type of backing board usually has a high compressive strength and high-strength material (such as XPS extruded board) as the base material in the middle layer, with a surface covered by a coating or material layer with functions such as waterproofing and wear resistance. This structure endows the board with multiple excellent properties, such as waterproofing, compressive resistance, and thermal insulation.

　　2. Specific Material Types

　　Gypsum board: It is light in weight and relatively inexpensive, but has poor moisture resistance and is not very durable.

　　Calcium silicate board: also known as composite gypsum board, it has stable performance, good fire resistance, water resistance and impact resistance, and is especially suitable for humid environments.

　　Corrugated sheet: light in weight, strong in rigidity, high in compressive strength, convenient in construction, and with high surface flatness.

　　Honeycomb panels: durable and sturdy, smooth and flat, with excellent resistance to aging, high temperatures, impacts, moisture, and corrosion.

　　3. Specifications

　　Sizes: Common backing board sizes include 600x1200mm, 1200x2440mm, etc. These sizes are convenient for cutting and splicing during construction.

　　Thickness: The thickness specifications of backing plates range from a few millimeters to several tens of millimeters, depending on the specific application requirements. For instance, some thin backing plates may only be 5-10mm thick, while those used in special circumstances could be 20mm or even thicker.

　　Due to the numerous brands in the backer board market, the specifications and types of products from different manufacturers may vary. Therefore, when making actual purchases, it is recommended to refer to the technical specification sheets of specific products or consult the manufacturers for accurate information. It should be noted that even high-performance backer boards should be thoroughly dried after soaking to ensure their performance. Additionally, in practical applications, if there are any doubts about the performance of the backer boards, it is best to conduct on-site tests or consult professional construction personnel.