Savannah's coastal location creates weather threats that most roofing materials were NOT designed for. Salt air, 90%+ humidity, hurricane winds, intense UV, and 50+ inches of annual rainfall assault your roof and accelerate aging far beyond manufacturer testing.
5 Weather Threats to Your Savannah Roof
1. Humidity (The Silent Killer)
75-80% average humidity year-round. Promotes algae, accelerates wood rot, causes attic condensation. Shingles lose 20-30% of their rated lifespan.
2. UV Radiation
218 sunny days per year. UV breaks down asphalt polymers, causing brittleness and cracking. Once granules erode, UV damage accelerates exponentially.
3. Hurricane Wind
We are in a hurricane zone. Standard 3-tab shingles (60-70 mph) are inadequate. We recommend 130 mph minimum wind-rated shingles.
4. Heavy Rainfall
50+ inches annually. Intense thunderstorms dump 2+ inches per hour, testing drainage and waterproofing beyond normal parameters.
5. Salt Air Corrosion
Within 15 miles of coast, salt corrodes exposed metal. We recommend aluminum or stainless steel flashing and fasteners for coastal homes.
Best Materials for Coastal Savannah
- • Atlas StormMaster Shake: SBS rubber core, 150 mph wind, Scotchgard algae protection
- • GAF Timberline HDZ: 130 mph wind, 25-year StainGuard Plus algae resistance
- • Standing seam metal: 140-160+ mph wind, salt-resistant aluminum, 40-60 year life
Ventilation Is Critical
No material performs optimally with poor ventilation. Proper ridge and soffit ventilation prevents trapped moisture that rots decking and shortens roof life.
Schedule a free consultation — we will recommend materials based on your specific location and coastal exposure level.
