The slat material changes weight, rust resistance and strength. Always confirm gauge and finish from the datasheet.
| Factor | Aluminium | GI (galvanised iron) |
|---|---|---|
| Weight | Lighter | Heavier |
| Corrosion | Does not rust | Depends on galvanising quality |
| Strength | Depends on profile and thickness | Generally strong for security |
| Typical use | Shopfronts, showrooms | Godowns, workshops, shops |
Our verdict
Both can work. The right pick depends on the security need, the opening size and the finish you want.