Standing Seam vs. Exposed Fastener (5V Crimp)
There are two main categories of residential metal roofing installed across Florida:
Standing Seam (Concealed Fasteners): Vertical metal panels interlock over hidden clips with raised seams. Because fasteners are concealed from sun and rain, standing seam roofs deliver a 50+ year lifespan and withstand 160+ mph winds.
5V Crimp / Corrugated (Exposed Fasteners): Screws with neoprene washers penetrate through the metal face. While more affordable initially, screws must be inspected and replaced every 10–12 years as washers dry out in the Florida sun.
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Cost Per Square and Total Roof Pricing
Roofers quote in 'squares' (100 square feet of roof deck surface):
- 5V Crimp Aluminum / Steel: $650 to $950 per square ($13,000–$22,000 total).
- Standing Seam 24-Gauge Galvalume: $950 to $1,450 per square ($22,000–$36,000 total).
- Standing Seam Aluminum (Coastal Salt Zones): $1,200 to $1,800 per square ($28,000–$44,000 total).
Insurance Discounts & Energy Efficiency
Installing a metal roof with a self-adhering peel-and-stick underlayment earns a certified Wind Mitigation Inspection credit, lowering annual Florida homeowner insurance premiums by 20% to 35%.
Kynar 500 reflective pigment finishes reflect up to 70% of solar radiation, cutting summer attic temperatures and lowering AC cooling bills by 15% to 25%.
| Roofing Profile | Cost per Square (Installed) | Wind Rating | Expected Lifespan | Fastener Style |
|---|---|---|---|---|
| Architectural Asphalt Shingles | $400 – $600 / sq | 110 – 130 mph | 15 – 20 Years | Nails (Covered by Shingle) |
| 5V Crimp Galvalume Steel | $650 – $900 / sq | 130 – 150 mph | 25 – 35 Years | Exposed Screws (Gasketed) |
| Standing Seam Galvalume Steel | $950 – $1,400 / sq | 150 – 170 mph | 45 – 60+ Years | Concealed Clip System |
| Standing Seam Aluminum (Coastal) | $1,200 – $1,800 / sq | 160 – 180 mph | 50 – 70+ Years | Concealed Stainless Clips |
Frequently Asked Questions
Is aluminum better than Galvalume steel for coastal homes?
If your home is within 1,500 feet of salt water or the Atlantic barrier islands, aluminum is strongly recommended because it will never rust, whereas cut edges on steel can corrode over time.
Are metal roofs noisy during heavy Florida rainstorms?
No. When installed over solid plywood decking with thick peel-and-stick underlayment and attic insulation, interior sound levels are virtually identical to shingle roofs.
Does a metal roof require special permits and engineering?
Yes. Florida Building Code requires engineering calculations verifying uplift resistance and fastener spacing for your specific wind zone prior to permit issuance.