Case 1
Navigation
- Introduction
- Causes of Defects
- Good Practices
- Standards
- Maintenance and Diagnostics
- Remedial
- Similar Cases
- References
Remedial
Stained paints and plasters are usually cleaned with high-pressure water jet. However if the stains are too serious and large, it is more appropriate to remove the affected surface coatings, sand, clean and redo the coating. New render is best primed with an alkali resistant sealer.
Only quality paints should be used and when any doubt exist, the advice of paint chemist should be sought.
| Condition of Painted Wall | Cleaning Method |
| Gloss or semigloss enamels
Lightly soiled Heavily soiled | Wash with water and mild detergent (e.g. hand dishwashing liquid), or a mild commercial household cleaner.
Use a stronger alkali solution (e.g. 2 tablespoons ammonia or tablespoon trisodium phosphate or 2 tablespoons laundry detergent powder in 1 gallon warm (not hot) water). Stronger solutions may remove some of the paint. Always rinse off. |
Table 1: General cleaning for painted surfaces