Comparison
Galvalume (GL) vs HDGI
Both resist corrosion but by different balances of barrier and sacrificial protection.
| Specification | Galvalume (GL) | HDGI |
|---|---|---|
| Coating | 55% Al-Zn barrier | Thick sacrificial zinc |
| Cut edges | Weaker | Fully covered by dipping |
| Best for | Roofing, moderate sites | Ground-mount, coastal, long life |
Frequently asked questions
- Which lasts longer outdoors?
- For ground-mount and coastal exposure, HDGI's thick edge-to-edge coating generally gives the longer maintenance-free life.
Not sure which to choose?
We will recommend based on your site and load case.