1. Removable panel systems
Permanent posts either side of the opening. Aluminium planks stack horizontally into a channel in the posts, each seated on a gasket. A plate or cap at the top clamps the stack down and compresses the seals. The planks come off and get stored between storms.
- Good at sealing an opening — doorway, garage or slider — with no ground occupied in front of the house
- Heights are practical to four, five and six feet; widths use a braced centre post
- Stops at the opening line: posts are permanent, the base needs a level bearing surface, and water still reaches your walls
2. Inflatable barriers
Two are worth knowing about, and both are genuine products rather than novelties. The French cushion system is a dropstitch PVC cushion with an EPDM contact face, around 31 inches of protection, deployed with a hand pump. The Irish door dam uses glass-fibre reinforced ABS with an inflatable rubber tube seal, about 23.6 to 28.3 inches of protection on openings 30 to 43 inches wide. They do not depend on mains power — both use manual pumps.
- Good at speed and simplicity for a single entry door on a house that takes shallow water
- Stop at height and width — typically two to two-and-a-half feet, sized for doors rather than garages
- The documented weakness is joining several units to span a wide opening; water can push through the seam
- Once inflated, you generally cannot deflate until the water recedes
3. Water-weighted barriers
A flexible barrier — typically PVC-coated polyester with ballast in the leading edge — unrolled across the ground. Arriving water pins the apron down. The best-known product in this format holds ANSI/FM 2510 certification tested at the US Army Corps of Engineers research centre. No removable aluminium panel system sold to Florida homeowners holds that certification, ours included. It can protect house, yard and equipment in one deployment with no permanent alteration to the building.
Apron footprint (manufacturer-published geometry)
| Retention height | Flat ground needed in front |
|---|
| 6 in | 2 ft |
| 20 in | ~6.7 ft |
| 39 in (1 m) | 13 ft |
| 60 in (1.5 m) | 20 ft |
It seals to the ground, not to the building. Published leak rate is 4 litres per minute per linear metre on smooth surfaces, 6.5 on natural surfaces — plan for pumps behind it.
This is a perimeter and infrastructure product. Manufacturer literature sells 360° runs of 300 to 1,000 metres. There is one genuine residential overlap: a 6 inch by 17 foot door-entrance unit, and six inches is its ceiling.
4. Absorbent and water-activated products
Water-activated tubes, absorbent socks and sandbag alternatives that swell on contact. This is the entire flood category at Home Depot, Lowe’s, Grainger and Fastenal today. For nuisance water, a leaking threshold or a low spot in a garage, it is the proportionate answer. These are consumables — single-use or near it, measured in inches rather than feet, with recurring cost.
Choosing between them
The distinction that decides most residential jobs is this: a door dam is right for one door at two feet and it ships in a box. A water-weighted barrier is right for a property with open ground around it. A sixteen-foot garage opening at four feet, sealed into the opening with nothing lying on the driveway, is a different problem — and on most Florida houses the garage is the widest and lowest opening on the building.
| If your problem is | The format that fits |
|---|
| One entry door, shallow water, want it simple | Inflatable door dam |
| A garage, slider or multiple openings at 2–6 ft | Removable panel system |
| A large lot, open ground, protect the whole property | Water-weighted perimeter barrier |
| Nuisance water and a low threshold | Absorbent product |
