Infrastructure armour
Guard comparison
Cheap plastic is a false economy in Perth's UV and bushfire exposure windows. Aluminium mesh programmes are specified for asset owners who cannot afford ember ingress or repeat truck rolls.
| Topic | BAL aluminium mesh | Cheap plastic |
|---|---|---|
| Fire rating / ember defence | Metal systems aligned to BAL-rated specifications for ember attack zones | Plastic degrades in UV — melt / drip risk near roofline heat |
| Fastening | Screw-fixed to substrate — wind lift resistance for Perth gales | Clip-in trays can pop under wind load or foot traffic during roof work |
| Pest exclusion | Fine aperture options for vermin / bird exclusion when specified | Gaps open over time — nesting and chew-through failures |
| Warranty posture | 12-month flow guarantee on installs & maintenance plan members (Tier 2) | Limited manufacturer support — frequent call-backs erode margin |