When Galvalume makes sense
Polk County is inland, which means most homes here don’t actually need Galvalume. Aluminum holds up fine 30+ miles from the coast. But there’s a band of properties, the southwestern corner of the county, especially around Mulberry, and properties at higher elevations that catch weather pushed inland from Tampa Bay, where salt-laden air becomes a factor over time.
For those, Galvalume buys you decades of corrosion resistance that aluminum can’t match. We don’t push it on customers who don’t need it; for an inland Lakeland home it’s overkill. For a property that catches Gulf air, it’s the right metal.
Specs
- Substrate: cold-rolled steel, .024 gauge typical for residential
- Coating: 55% aluminum, 43.5% zinc, 1.5% silicon (AZ-50 or AZ-55 designation)
- Finish options: mill (unpainted), Kynar 500 painted (limited palette)
- Profile: 5-inch and 6-inch K-style; 6-inch box and half-round available on commercial
- Warranty: 25-year corrosion (substrate) + finish warranty per coating + 5-year workmanship