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Galvalume vs. Aluminum:
The Savannah Coastal Guide
One rusts in 3 years on Tybee Island. The other lasts 50+ years. If you live in Savannah or the Islands, choosing the wrong metal could cost you thousands.
The "Salt Line" Rule
In Coastal Georgia, distance from the ocean determines everything. Salt spray is highly corrosive to steel-based products.
Within 3 Miles of Coast?
MUST USE ALUMINUM.
Includes: Tybee Island, Wilmington Island, Whitemarsh Island, Skidaway Island (The Landings), and parts of Thunderbolt. Galvalume warranties are VOID here.
Inland Savannah / Pooler?
GALVALUME IS EXCELLENT.
Includes: Pooler, Guyton, Rincon, Bloomingdale, West Chatham. Galvalume offers incredible strength and value when away from direct salt spray.
Quick Comparison
Why Aluminum is King of the Coast
Aluminum creates its own protective oxide layer that naturally resists corrosion. It physically cannot red-rust because it contains no iron.
No Red Rust
Will never degrade into red rust stains, even with ocean spray.
Warranty Safe
The only material manufacturers warranty within 1,500 feet of the ocean.
Resale Value
Islands buyers know the difference. "Aluminum Roof" is a major selling point.
The Case for Galvalume (Inland)
Galvalume is steel coated with zinc and aluminum. It is incredibly strong and cost-effective, making it the perfect choice for homes away from the immediate salt line.
- Superior StrengthSteel core provides excellent impact resistance against falling branches and hail.
- Cost EffectiveTypically 20-30% less expensive than aluminum roofing systems.
- The Cut-Edge RiskCut edges can rust if exposed to salt. This is why we don't use it on Tybee.
Ideal Locations for Galvalume:
Don't Get Sold the Wrong Roof
Many out-of-town roofers will try to sell Galvalume on Tybee Island because it's cheaper and easier to buy. This is a massive mistake. Ensure your quote specifies "0.032 or 0.040 Aluminum" if you are beachside.