With the continuous improvement of building energy conservation standards, the performance and construction quality of exterior wall insulation materials have become the focus of industry attention. Ceramic insulation boards, as a new type of material integrating high performance and environmental friendliness, are demonstrating remarkable value in the field of building exterior wall insulation due to their unique technical advantages and scientific construction techniques. The following is an analysis from two aspects: technical characteristics and key construction points.

I. Technical Advantages: High-performance indicators reshape the insulation standard
High-efficiency thermal insulation and heat preservation, reducing building energy consumption
Ceramic insulation boards are made from raw materials such as clay tailings and ceramic debris, which are formed into a honeycomb closed-cell structure through high-temperature expansion and sintering. The internal porosity is as high as over 85%, and the thermal conductivity is as low as 0.04W/(m · K), which is superior to traditional rock wool (0.045W/(m · K)) and polystyrene boards (0.03W/(m · K)). This structure effectively blocks heat conduction. In summer, it can reduce the invasion of outdoor heat by more than 30%, and in winter, it retains an indoor heat loss rate of less than 15%, significantly reducing the load on air conditioning and heating, and helping buildings achieve an energy-saving goal of over 65%.
A1 grade non-combustible fireproof, building a safety barrier
The material itself is made of inorganic ceramic, and its combustion performance meets the GB8624-2012 A1 grade standard. It does not burn, drip or release toxic gases when exposed to open flames. After being tested at a high temperature of 1000℃, the integrity retention rate of the sheet exceeded 90%, and the smoke density grade (SDR) was ≤15, which was far lower than the national standard (SDR≤75). This feature makes it the preferred solution for fire safety in scenarios such as high-rise buildings and commercial complexes, meeting the strict requirements of fire protection regulations for insulation materials.
Super weather resistance and corrosion resistance, extending the service life of buildings
After 80 cycles of hot rain (-30℃ to 80℃) and 500 hours of ultraviolet radiation tests, there was no cracking or powdering on the surface of the ceramic insulation board, with a mass loss rate of less than 1% and a flexural strength retention rate of over 95%. In the tests of acid resistance (soaking in pH=1 solution for 24 hours) and alkali resistance (soaking in pH=13 solution for 24 hours), the change rate of compressive strength was both less than 5%. It is suitable for complex climatic conditions such as acid rain areas and coastal high salt spray environments, and its service life can reach more than 50 years, the same period as the main structure of the building.
Green, environmentally friendly and circular, practicing sustainable development
More than 90% of the raw materials in the production process are industrial waste (such as waste slurry from ceramic factories and river silt). Each ton of product can consume 1.2 tons of solid waste, and the energy consumption is 40% lower than that of traditional ceramic products. The material itself does not release harmful substances such as formaldehyde and benzene, and can be 100% recycled and reprocessed into new boards or roadbed fillers after being discarded. It meets the national requirements for “waste-free city” construction and has obtained the three-star certification of green building materials.

Ii. Key Points of Construction: Standardized procedures ensure project quality
Base treatment: Lay the foundation for construction
The wall surface should achieve a plastering strength of ≥5MPa, a flatness error of ≤4mm/2m, and remove loose dust, oil stains and hollowing areas.
For different substrates such as shear walls and aerated blocks, interface agents (such as polymer cement slurry) are used for roller coating treatment to enhance the bonding force.
The holes on the exterior walls (such as scaffold eyes) should be filled in layers with C20 fine aggregate concrete to ensure there is no risk of leakage.
Bonding and anchoring: Double safety fixation system
Adhesive preparation: Use a special ceramic insulation board adhesive (cement: sand: adhesive powder = 1:1.5:0.05), stir until uniform and free of lumps, let it stand for 5 minutes, and then stir again for use.
Bonding process: Full bonding method or dot-frame method is adopted, with a bonding area of ≥60%. The panels are spliced with staggered seams. The vertical seams are staggered by no less than 1/3 of the panel length. At the corners, L-shaped panels are spliced with staggered joints, and the seam width is no more than 2mm.
Mechanical anchoring: At least 6 anchor bolts are set per square meter (at least 8 for high-rise buildings), with the anchor bolts extending at least 50mm into the base wall. The area around the first floor and door and window openings is densified.
Anti-cracking protection: Construct a flexible anti-cracking layer
The plastering mortar is applied in two layers: The first layer is 3-5mm thick, with alkali-resistant fiberglass mesh fabric pressed in (lap width ≥100mm), and 400mm×400mm reinforcing mesh laid at the corners. The second layer is 2-3mm thick and covered with mesh fabric without showing any white.
U-shaped weather-resistant sealant is used to fill the expansion joints, door and window openings and other parts, with a joint width of 8-10mm. Polyethylene foam rods are filled inside to ensure waterproofing and anti-deformation capabilities.
Finished product protection and acceptance
Within 24 hours after the completion of the construction, avoid rain erosion, impact and vibration. It should be cured at room temperature for more than 7 days before subsequent decoration construction can be carried out.
Key points for acceptance: bonding strength (tensile test ≥0.1MPa), anchoring force of anchor bolts (single ≥0.3kN), thickness of insulation layer (error ≤5%), surface flatness (≤3mm/2m), and keep good video records of concealed works.

Iii. Application Scenarios and Typical Cases
Ceramic insulation boards are suitable for external and internal insulation of new building exterior walls and energy-saving renovations of existing buildings, especially in the following scenarios:
High-rise buildings: For instance, a 30-story residential project uses 50mm thick ceramic insulation boards. After energy-saving testing, the heat transfer coefficient K value is ≤0.5W/(㎡ · K), meeting the requirements of the “Energy Efficiency Design Standard for Public Buildings”.
Ultra-low energy consumption building: a certain passive house project uses 80mm thick panels and combines high air tightness design, with the building’s energy consumption as low as 15kWh/(㎡ · a), meeting the German PHI certification standard.
Renovation of historical buildings: In the renovation of a century-old villa, 30mm ultra-thin ceramic insulation boards were used for internal application. Without changing the original exterior appearance, the insulation performance was improved by three times.

Conclusion
Ceramic insulation boards, with their technological advantages, have broken through the performance bottlenecks of traditional insulation materials. They ensure project quality through standardized construction processes and provide an integrated solution that is “safe, energy-saving, durable and environmentally friendly” for exterior wall insulation of buildings. With the improvement of industry standards (such as the promotion of the “Technical Code for Application of Ceramic Insulation Boards”) and the popularization of construction techniques, its application in the fields of green buildings and ultra-low energy consumption buildings will enjoy a broader space. Construction units must strictly control the quality of materials and process details, fully leverage the comprehensive performance of the materials, and contribute to achieving high-quality development of buildings under the “dual carbon” goals.