cn
Performance advantages and key construction points of rock wool in building exterior wall insulation
2025-12-09       Source:

Rock wool, with its high-temperature resistance, non-combustibility, and strong thermal insulation properties, has become a commonly used material in building exterior wall insulation systems. It offers multiple benefits for improving building energy efficiency and structural safety.


I. Performance Advantages of Rock Wool Exterior Wall Insulation

1. Class A Non-combustible Material


Rock wool is an inorganic mineral fiber with outstanding high-temperature resistance, maintaining structural stability even in high-temperature environments, making it a crucial guarantee for exterior wall safety.

2. Stable Thermal Insulation


Its low thermal conductivity reduces heat loss in winter and heat transfer in summer, improving building energy efficiency.

3. Breathable and Water-Resistant


The loose structure of rock wool fibers facilitates moisture diffusion, reducing wall dampness.

4. Excellent Sound Insulation


Rock wool's sound absorption performance is superior to many other insulation materials, enhancing building comfort.


II. Applicable Fields

Commercial Building Exterior Walls


Residential Community Energy-Saving Renovation


Industrial Plant Exterior Walls


High-Rise Building Fire Barriers


III. Key Points of Construction Process

1. Base Treatment


Ensure the wall surface is flat, free of dust and hollow areas. 2. Adhere the Rock Wool Boards


Apply the bonding mortar using the dot-and-frame method to ensure a firm bond.

3. Anchoring and Fixing


Reinforce with expansion nails to improve wind pressure resistance.

4. Finishing and Reinforcement with Mesh Fabric


The finishing mortar must cover the mesh fabric to form a protective layer.

5. Finishing Layer Construction


Select finishing methods such as paint or tiles according to the project requirements.


IV. Precautions

Rock wool boards must not be stored in damp conditions.


Fixing points must be installed according to the design quantity.


The external insulation system requires a complete set of matching materials.


Avoid plastering during rainy weather.


V. Summary

Rock wool external wall insulation systems offer advantages in fire resistance, heat insulation, and sound insulation, making them an important component of modern building energy conservation. Proper construction can achieve more stable energy-saving effects and a longer service life.