Brickwork stains – bricks may be stained as follows:
- Cement staining from mortar and concrete
- Lime running
- Dirt, grime, soot and smoke
- Oil, grease and tar
- Organic Growths
- Paint and Graffiti
- Efflorescence
- Yellow or green efflorescence (Vanadium salts)
- Iron Staining
- Manganese staining