Painted aluminum is an excellent metal roofing material because it does not rust, weighs about a third of steel, and holds its color for decades with a 70% PVDF finish. For roofing, specify a 70% PVDF coating, a gauge appropriate to the panel profile and wind zone (commonly .032 to .050), a corrosion-resistant alloy, and a color rated for exterior UV exposure.
Why use aluminum for metal roofing?
- No rust: ideal for coastal and high-humidity roofs where steel corrodes.
- Light weight: reduces structural load and eases installation.
- Long color life: 70% PVDF finishes resist fade and chalk for decades.
- Reflectivity: many colors offer solar-reflective options for cooler roofs.
- Recyclable: aluminum is highly recyclable at end of life.
What to specify for an aluminum roof
| Spec | Recommendation |
|---|---|
| Coating | 70% PVDF (Kynar 500®, Fluropon®) for exterior life |
| Gauge | Commonly .032 to .050, heavier for high-wind zones |
| Alloy/temper | Corrosion-resistant alloy with temper suited to forming the profile |
| Color | UV-rated exterior color; consider solar-reflective options |
| Finish | Consider reflectivity and gloss for the climate and design |
What about coastal roofs?
Aluminum shines near saltwater because it will not rust even where panels are cut or scratched. Pair it with a 70% PVDF finish and a UV-rated color; see choosing aluminum finishes for coastal and high UV environments. Confirm formability for your roofing profile in can painted aluminum be bent without cracking.
How thick should an aluminum roof be?
Gauge depends on the panel profile, span, and wind load. Standing-seam and exposed-fastener panels commonly use .032 to .050 painted aluminum, with heavier gauges in high-wind regions. See the full breakdown in the painted aluminum gauge guide. Wrisco supplies 70% PVDF painted aluminum for roofing on the painted aluminum sheets page.
Frequently asked questions
Is aluminum better than steel for roofing?
For corrosion resistance and weight, yes, especially in coastal areas. Steel offers higher strength at lower cost where rust is less of a concern.
Does an aluminum roof fade?
Very slowly with a 70% PVDF finish, which is engineered to hold color for decades.
What gauge is typical for aluminum roofing?
Commonly .032 to .050, with heavier gauges chosen for high-wind zones and longer spans.