Metal Multi Tile
Types and Durability
| Description
Metal multi tiles |
Expected Lifespan
(Years) |
Adjustment Factors |
| 0.42 to 0.60 mm BMT (Base Metal Thickness) steel or galvanised sheets complying with requirements of CP 89: 2001. | 10-15 | 1st stage adjustment factor:
In industrial areas (heavy polluted): -15% of no. of years In urban areas: -10% of no. of years In suburban areas: no adjustment 2nd stage adjustment factor: Within 20m from express way: -20% of no. of years Within 20m from major arterial road: -10% of no. of years Within 20m from light traffic road: -5% of no. of years Within 20m from sea water/ area prone to salt spray: -15% of no. of years Test certificate from approved local testing authority : +15% of no. of years |
| Galvanized steel sheet with weathering face coated with acrylic paint. Underside coated with protective paint. Coated with approved colour. | 25 | |
| 0.4 to 0.5mm thick steel sheet galvanized minimum 275 gr/m² on both sides, pressed into tile profiles and coated with an acrylic base coat on both sides. Additional coating to weathering face to be acrylic top coat with embedded natural cleaned and graded silica granules then sprayed with acrylic glaze. | 20 | |
| Galvanized steel sheet minimum 0.4 mm thick. Zinc minimum 275 gr/m². Weather face coating PVF2 or acrylic or silica. | 5 | |
| Unknown steel sheet thickness. weight of galvanizing and/ or extent and type of coating | < 5 | None |
Combination of adjustment factor (1st stage and 2nd stage) should be added to obtain the durability values. Refer to durability calculator
If aluminium or stainless steel or copper fixings are used, adjustment factors are provided for ferrous fixings:
- Unprotected/ unplated ferrous fixings: -30% years
- Galvanized or electroplated ferrous fixings: – 15% years
Note: Fixings are made with either galvanized annular groove, or electorplated and passivated carbon steel self drilling screw with plastic coated head.
Fixings as recommended by manufacturer only.