• Damage caused by moisture absorption
• Efflorescence and scaling of the surface
• Attacks of fungi, mold and algae
• Color scaling
• Early get dirty of the surface
• Alkali silicate reaction
• Cracks due to swelling and contraction
• Freezing and continuous melting of water in materials
• Carbonization - Acid rain - Sulfation - Chemical corrosion
• Corrosion of metal used in the structure of the building
✓ Air pollution, especially in big cities, and staining the faces of city buildings
✓ The difficulty, and even sometimes the impossibility of washing the facades of buildings
✓ Erosion, dirty and pale facades of some buildings in cities
