Aluminum Flood Barriers in St. Augustine

Hammerhead™ aluminum flood planks, custom-sized to your openings, built in the USA, and ready to deploy before the next storm.

USA-Made | 5,000+ Projects | Sourcewell & TIPS contracts | Free Property Assessments

St. Augustine’s historic low-lying downtown sits along the Matanzas River just inland of the Atlantic, where tidal flooding is a regular occurrence and storms bring damaging surge. Ground-level doorways and garages in the historic core and waterfront neighborhoods flood readily.

The Hammerhead™ Aluminum Flood Plank System

Hammerhead is a stop-log flood barrier with permanent U-Channel posts mounted on either side of an opening, and rigid aluminum planks slide in and tighten down to create a watertight wall when a storm is coming. Between storms, the planks store compactly and the low-profile posts stay in place.

Custom-sized to every opening: doorways, garages, lanais, loading bays
6063 T-6 extruded aluminum plus stainless steel hardware: corrosion-resistant, USA-made
Patented SureGasket™ + AlumiSeal™: dual sealing for a tight, watertight seal
Rated to about 6 ft with center-post extensions for wider spans
Deploys in minutes by unskilled labor; planks slot in and clamp down
Built for high wind and debris: fixed posts and clamped planks handle the stresses coastal storms bring

For protection above plank height, on larger openings, or around an entire perimeter, Flood Barrier Systems offers a full line of complementary products.

PREPARE IN ADVANCE

Get St. Augustine storm-ready before hurricane season

The best time to plan flood protection is before a storm is named. Hammerhead posts install once and stay in place, so when a warning is issued your planks slot in and tighten down in minutes, no scramble for sandbags, no last-minute contractors.

Assess early: book a free property assessment.
Install posts now: the permanent posts go in on a calm day, not the day before landfall.
Store planks on-site: compact storage keeps everything ready to deploy.
Deploy fast: slot, tighten, and clamp when a storm approaches.

Waiting until a storm is in the forecast often means limited availability. Preparing in advance means you are protected the moment you need it.

WORK DIRECTLY WITH THE MANUFACTURER

Made by the people who engineer it

Flood Barrier Systems is Garrison Flood Control. That means direct access to the team that designs and manufactures Hammerhead: expert product guidance, genuine parts and seals, professional installation by our Florida team, and fast delivery from our regional Pompano Beach, Florida warehouse.

EXPLORE THE FULL FLOOD PROTECTION LINE

More than flood planks: complete protection for St. Augustine Properties

Hammerhead aluminum planks are ideal for doorways, garages, and lanais. Some properties also need to protect sloped ramps, larger openings, or an entire perimeter. Flood Barrier Systems offers a full range of flood protection products, all from one manufacturer:

Mayim Flood Barrier™: a modular, interlocking barrier for large-scale protection of buildings, roadways, and industrial facilities. Units are available in 20”, 30” and 40” of protection.

YellowFIN™ Flood Panels: a refined composite flood panel system with sealed aluminum framing for openings where appearance and performance both matter.

MAKO Inflatable Flood Barrier: Create a strong, reliable seal across entryways in minutes with a marine-grade inflatable flood barrier.

BlueFIN™ Interconnecting Flood Wall Barrier: a modular flood panel wall for perimeter protection around homes, utilities, and infrastructure, built to resist hydrostatic and hydrodynamic pressure.

Guppy™ Heavy-Duty Water-Filled Barrier: a reusable, water-filled barrier for fast, temporary protection of larger areas and infrastructure.

Stingray Self-Rising Water Dam: a localized dam that activates automatically as floodwaters rise, with no power or manual setup required.

Oyster™ Self-Rising Flood Gate: a water-activated gate for sloped garage ramps, driveways, and loading docks that lies flat for everyday access and rises automatically as floodwater fills it, with no power required.

Serpent Flood Barrier: Quickly create a flexible line of defense with a durable, air-filled flood barrier built to protect larger openings and perimeter areas.

Minnow Water-Activated Sandbags: Build a fast, reliable flood barrier with lightweight sandbags that expand on contact with water.

Not sure which system fits your St. Augustine property? Our team can recommend the right product, or the right combination, during a free assessment.

LOCAL FLOOD CONTEXT

Flood risk in St. Augustine, St. Johns County

Hurricanes Matthew in 2016 and Irma in 2017 both flooded St. Augustine’s historic district and low-lying neighborhoods, and the city continues to see recurring tidal (nuisance) flooding. Protecting ground-level openings is central to preserving older waterfront structures.

Much of St. Augustine falls within FEMA AE and VE zones across the historic downtown and waterfront, with X zones on higher ground, with flooding driven by the Matanzas River, the Intracoastal Waterway, and the nearby Atlantic. Historic and waterfront St. Augustine properties in AE and VE zones typically carry NFIP requirements; documented mitigation can support your flood plan. Confirm with your county or insurance for NFIP specifics.

LOCAL PROOF

Hammerhead projects near St. Augustine

Across Northeast Florida, Garrison’s Hammerhead planks protect ground-level openings against the tidal and storm-driven flooding that low-lying waterfront districts experience.

Process

How it works in St. Augustine

1. Free assessment: we measure your openings and evaluate flood exposure across Northeast Florida

2. Custom quote: the right number of planks and posts for each opening.

3. Professional installation: our Florida technical team installs, or supports your DIY install.

Protect your St. Augustine property before the next storm Free assessment. USA-made Hammerhead planks. Ready when you need them.

FAQs

Can barriers protect a historic St. Augustine building?

Yes. Each barrier is custom-sized to the opening, and the low-profile posts can be painted to suit a historic appearance while sealing out water when needed.

Does Hammerhead help with routine tidal flooding?

Yes. Because the posts stay in place, planks can be deployed for predicted high-tide events as well as for storms.

How high can Hammerhead protect?

Standard protection is up to about 6 ft, customizable by the number of planks, with center posts for wider spans. For deeper water we offer additional Garrison systems.

What areas of St. Augustine do you serve?

We serve the Historic Downtown, Davis Shores, Lincolnville, Vilano Beach, and Anastasia Island and the wider St. Johns County area.

Can Hammerhead barriers protect a St. Augustine home?

Yes. Hammerhead planks are custom-sized to each doorway, garage, and lanai opening, and the posts install ahead of time so the planks deploy in minutes when a surge or heavy rain is forecast.

When should St. Augustine homeowners install flood barriers?

Before hurricane season. Posts go in on a calm day, and planks store compactly on-site until a storm approaches.