GARAGE DOOR FLOOD BARRIERS. THE WIDEST OPENING, SEALED.
Custom aluminum panels measured to your garage opening, fabricated in our own shop in St. Petersburg and installed by our own crew. Rated to hold back up to 10 feet of water.
Most garage door flood barriers are a rubber strip or a one-size kit. Ours are measured to your exact opening, single or double, and built to stand up to storm surge, not just rain.
Ask about monthly payment options.
- Measured to your openings. Doors, garages, sliders, each one custom.
- Exact, itemized quote. Free assessment, no obligation.
- Built in St. Petersburg. One team from measure to install.
The garage is the biggest hole in your flood plan.
On most Florida homes the garage is the widest and lowest opening on the house. A standard two-car door is about 16 feet across, and many garage slabs sit a step below the rest of the house. When surge or flood water comes up the driveway, the garage is where it gets in first.
Garage doors are built to keep out wind and weather, not standing water. Water pushes under the bottom seal and through the gaps at the sides, and once it is in the garage it heads for the door into the house.
A garage door flood barrier closes that whole opening, edge to edge, with panels measured to your garage and sealed at the floor and the sides.
of water our barriers are rated to hold back
Compare that to the inch or two a rubber threshold strip or garage door dam can handle. Those help with rain. They are not built for surge.
starting price per opening
A garage costs more than a standard door because of its size. The free assessment gives you an exact, itemized number, and flexible financing is available.
Built for the size and the load of a garage.
A garage opening is wide, and water pushes on every inch of it. Here is how we build for that.
Measured to your opening
We measure every garage on site. Panels are cut to your exact width and height, so the fit is tight from one side of the opening to the other.
Center posts and braces for wide spans
Double and oversized garages get a removable center post or brace set into the floor, so the panels stay rigid against moving water.
Sealed at the floor and sides
Water finds the smallest gap. Gaskets seal each panel to the next, to the side channels and to the slab.
The 50% rule
After a flood, Florida’s 50% rule decides whether you can repair or must rebuild to current code. Keeping water out keeps damage below that line. How the 50% rule works.
This is what it looks like when a storm is named.
The channels are already mounted on your house, flush and out of the way. When a storm is coming, the panels slide in, stack and seal. Garage, front door, sliders onto the lanai, every opening that faces the water.
Every panel is labeled for its spot, so anyone in the house can put the garage barrier up. Our crew walks you through it at install, so you have done it before the first storm.
Schedule my free flood assessmentEvery way the water gets in, closed.
Water is not picky. It comes through the front door, the garage, the sliders, the vents and the sewer line, sometimes all at once. Sealing one opening and leaving the rest is how houses still flood with barriers up.
Flood Barriers for Home
Custom panels measured to every opening on the house, not a one-size kit.
Door Flood Barriers
The threshold gap under every exterior door, sealed below the water line.
Garage Door Barriers
The widest and lowest opening you have, and usually the first one to let go.
Sliding Door Barriers
Lanai and pool deck sliders, where the track weep holes start running backwards.
Backflow Prevention
The drains. Barriers work above ground, this handles the line underneath it.
Flood Vent Covers
Foundation vents and utility penetrations, the openings nobody counts.
One free assessment maps every opening above ground and the sewer line below it, and puts all of it in a single plan.
From the call to a protected house.
Free assessment
We come to you, walk the property, and give you a straight answer on which openings actually need protection and which do not.
Exact measurement
Every door, slider and garage opening measured to the millimeter. Your system fits your house and nobody else’s.
Built in our factory
Panels cut, welded and gasketed by our own people. No dealer network, no shipped kit, no subcontractor with a box.
Install and walkthrough
We mount the channels, fit every panel, and put you through one practice deployment so you are not learning it in the rain.
Ready when it matters
Most homes deploy in about an hour. Prefer hands off? We offer storage and deployment service too.
Built heavier, sealed tighter, made in Florida.
2.5X thicker. Sealed under pressure.
Aluminum profiles roughly 2.5 times the thickness of most competing products, paired with larger, age-resistant dual-phase EPDM compression gaskets that seal tighter as water pushes against them. Rated to hold back up to 10 feet of water.
We build it. We install it. Nobody else touches your house.
Our founders’ own homes flooded, which is the reason this company exists. Every system is assessed, fabricated and installed in house. The people who measured your openings are the people who mount the channels.
View system specifications
Reinforced cross sections, deeper channels, solid cast stainless hardware and dual-phase EPDM gaskets. Put ours next to anything else on the market and the difference is visible.
You will forget it is there until you need it.
Your garage still works
The channels mount beside the opening. Your door, your car and your storage stay exactly as they are.
Up fast when a storm is named
Panels slide into the channels and stack. Every one is labeled for its position.
Stores flat
When the storm passes, the panels come down and store flat on a shelf or against a wall.
Our crew, not a subcontractor
We fabricate in St. Petersburg and our own team does the measuring and the install. No middleman.
Measured to the opening. Built to seal.
What homeowners say after the install.
After our home flooded from storm surge, we decided to install flood barriers. Dam It Defense installed them at all our garage and door entryways, and they store and deploy them for us when hurricanes threaten. They answered all of our needs. The product is well constructed and heavy duty.
Lee was very informative about the system. The panels are light enough that anyone can install them, and they provided extra pieces and even offered to move the sliding system once my patio is finished. The company has been easy to work with. I have peace of mind if another hurricane comes. Would recommend this company!
We feel very fortunate to have found Dam It Defense. The pricing was lower than any other company and the product far superior. The install team led by Andrea was thorough, professional, and did an amazing job. Everyone from the owners to the installers was knowledgeable and incredibly service oriented. It was a no brainer to go with them.
I reached out to Dam It Defense and Lee came out the very next day, on time as scheduled. He went over the process, showed us samples of the panels, and measured all the entry points. He was extremely personable and patiently addressed every concern and question we had. It really put us at ease.
Don’t just take our word for it.
Our founders’ own homes flooded. They built the company local news has covered ever since.
Their homes were both flooded by Hurricane Helene, so they built a flood prevention system with sturdy aluminum and modular height options.Read the story
A pair of St. Petersburg flood victims opened Dam It Defense to provide residential flood barriers after Hurricane Helene impacted their homes.Read the story
The company opened its first factory in St. Petersburg’s Warehouse Arts District a year after Helene, with family and community atop the founders’ priorities.Read the story
Dam It Defense launched in 2025, sold several hundred systems, and grew into a local team of nearly 20 employees.Read the story
Garage door flood barriers: common questions.
What is a garage door flood barrier?
A garage door flood barrier is a set of removable aluminum panels that slide into channels mounted on each side of your garage opening. When a storm is coming, the panels stack and seal across the opening to keep floodwater out. The rest of the year, the channels sit flush and out of the way.
Can a flood barrier cover a double garage door?
Yes. Wide openings like a two-car garage are some of the most common installs we do. Longer spans use a removable center post or brace, set into the floor, so the panels stay rigid against moving water.
How is this different from a garage door threshold seal?
Stick-on threshold strips and rubber garage door dams are an inch or two tall. They help with rain and runoff, not storm surge. Our barriers are measured to your opening, built in our own shop and rated to hold back up to 10 feet of water.
How much does a garage door flood barrier cost?
Systems start at $499 per opening. A garage costs more than a standard door because of its width and height. The free assessment gives you an exact, itemized quote, and flexible financing is available.
Can I still use my garage door with the barrier installed?
Yes. The panels only go up when a storm is coming. The channels mount beside the opening, so your garage door and car come and go like normal the rest of the year.
Where do you install garage door flood barriers?
We build in St. Petersburg and install across Tampa Bay and the Gulf Coast, from Tampa and Clearwater to Sarasota, Fort Myers and Naples.
Garage door flood barriers across Tampa Bay and the Gulf Coast
See how our flood barriers are built, or compare flood barriers and inflatable flood tubes. Comparing providers? Here is how to vet flood prevention companies in Florida.
Seal your garage before the next storm.
Book a free flood assessment. We measure every opening on your home and give you an exact, itemized quote. Systems start at $499 per opening, with flexible financing available.
Serving Tampa Bay and the Gulf Coast