TiO2 Coating Homepage > Defect Library > Green Building Technologies > Façade Coatings > TiO2 Coating Navigation Introduction Defects Good Practices Maintenance and Diagnostics Remedial References Defects of Façade Coatings Black Streaks and Rapid Darkening of Facades Algae Growth Green Stains White Patches Discoloration of Concrete Columns Damaged Edges Sealant Staining Dirt Staining on Glass Back to Previous Page