Mild Steel
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Maintenance and Cleaning
| Types | Maintenance / Cleaning | Cleaning Frequency |
| Hot dip galvanized steel to ASTM E 1514-98 or BS EN 10142 or BS EN 10147, minimum 275 g/m² zinc coating weight. PVC/ Plastisol coating, 200 microns nominal thickness [1] | Inspection:
Annual inspection and maintenance in accordance with BS 5427: Part 1, Table 9. [1] Renewal of side/ end lap seal as necessary Cleaning: Regular cleaning with non-alkaline detergent or simply by water |
Polluted/ marine areas/ heavy industrial: every 3 months (4x/year)
Other areas: every 6 month (2x/year) |
| Hot dip aluminium-zinc coated steel to ASTM E 1514-98 or BS EN 10215, minimum 150 g/m² zinc coating weight. Acrylic/ polyester/ silicone polyster/ PVDF/ PVF2 coating, 25-50 microns nominal thickness [1] | ||
| Acrylic/ polyester/ silicone polyster/ PVDF/ PVF2 coating to ASTM E 1514-98, 25-50 microns nominal thickness [1] | ||
| Hot dip galvanized steel to ASTM E 1514-98 or BS EN 10142 or BS EN 10147, minimum 350 g/m² zinc coating weight [1] | ||
| Mild steel not relevant to BS, or coating/ surface protection less than above specification [1] |
Notes: In cases where the regular maintenance referred to above does not remove all dirt which may have adhered to the surface of the paint, the following procedure should be carried out:
- Wash the surface with a mild solution of pure soap or mild non-abrasive kitchen detergent in warm water.
- Application should be with a sponge, soft cloth or soft bristle nylon brush, and should be gentle to prevent shiny spots.
- Surface should be thoroughly rinsed with clean water immediately after cleaning to remove traces of detergent.
Refer to General Guidelines for maintenance and inspection of roof