Among the numerous components of buildings, exterior wall insulation boards are quietly playing an increasingly crucial role. They act like a solid shield for buildings, safeguarding the safety line of buildings in all aspects with their outstanding fire resistance and moisture resistance, and creating a reassuring and comfortable environment for the users of buildings. ​

Outstanding fire resistance performance, safeguarding life and property
Fire is undoubtedly one of the most serious threats to building safety. The exterior wall insulation board, with its outstanding fire resistance performance, has become a powerful barrier against fires. Many exterior wall insulation boards are made of inorganic materials, such as rock wool and glass wool. These materials have inherent non-combustible properties and can effectively prevent the spread of flames. Take rock wool insulation board as an example. It is made from natural rocks through high-temperature melting processing. It will not burn even in a high-temperature environment above 1000℃, and its combustion performance reaches the highest A1 grade standard. This means that when a fire breaks out, it will not catch fire as quickly as organic materials, thus buying precious time for the evacuation of people in the building and fire rescue. ​
Not only that, the fireproof design of the exterior wall insulation board is also reflected in its construction system. In a complete external wall insulation system, the insulation board is firmly bonded to the base layer of the wall surface through a special adhesive. Coupled with the synergistic effect of the alkali-resistant glass fiber mesh fabric protective layer and the decorative layer, a tight and stable overall structure is formed. This structure can effectively prevent the insulation board from falling off due to local high temperatures, thereby preventing the flame from further spreading through the falling of the insulation board. It enhances the stability of the building’s exterior walls in case of fire and builds an impregnable fireproof fortress inside the building, minimizing the losses caused by the fire to the greatest extent. ​

Super moisture resistance, maintaining the stability of building structures
Damp environments are also a major challenge to building durability, and exterior wall insulation boards have demonstrated outstanding performance in moisture resistance. The exterior walls of buildings are exposed to the natural environment for a long time. The invasion of rainwater and changes in air humidity may both cause the walls to become damp. Once the walls get damp, it will not only affect the comfort of the interior, such as causing problems like mold and unpleasant odors on the walls, but also may erode the building structure and reduce the service life of the building. The exterior wall insulation board effectively blocks the invasion of moisture through its own characteristics and reasonable system design. ​
Some insulation boards themselves have extremely low water absorption rates. For instance, extruded polystyrene (XPS) insulation boards have a tight closed-cell structure inside, making it difficult for water molecules to penetrate into the board. Their water absorption rate is usually as low as less than 1%. This enables the insulation board to remain dry all the time when exposed to rain erosion, maintaining good insulation performance and preventing a significant reduction in insulation effect due to water absorption. Meanwhile, in the entire exterior wall insulation system, the protective layer and decorative layer also have waterproof functions. They are like putting on a raincoat for the building, further preventing rainwater from seeping into the interior of the wall. Even in areas with frequent heavy rain and humid climate, exterior wall insulation boards can ensure that the walls remain dry for a long time, protecting the building structure from moisture damage and ensuring the stability and safety of the building structure. ​

Dual insurance mechanism, providing all-round protection for building safety
The exterior wall insulation board integrates the two key properties of fire resistance and moisture resistance, forming a powerful dual insurance mechanism and providing all-round protection for building safety. From the perspective of the entire life cycle of buildings, whether it is new construction or energy-saving renovation of existing buildings, the application of exterior wall insulation boards is of great significance. For new buildings, installing high-quality exterior wall insulation boards at the initial stage of construction can prevent the hazards caused by fire and dampness from the root, ensuring that the building has good safety and durability from the moment it is put into use. For existing buildings, by renovating and installing exterior wall insulation boards, the deficiencies of the original buildings in terms of fire resistance and moisture resistance can be made up, the overall safety level of the buildings can be enhanced, and the service life of the buildings can be prolonged. ​

External wall insulation boards, with their outstanding fire resistance and moisture resistance, have become an indispensable and important component of modern buildings. It is like a loyal guard, standing guard day and night, protecting the building from the ravages of fire and the erosion of dampness, safeguarding the safety line of the building, and providing a safe, comfortable and lasting space for people’s life and work. With the continuous advancement of construction technology, the performance of exterior wall insulation boards will also be continuously optimized and upgraded, playing a more significant role in the construction field and contributing to the creation of a safe, green and sustainable building environment.