Flood Barriers
HERMEQ flood barriers are modular, reusable units that build a temporary wall against flash floods and rising water at doorways, driveways, warehouses, parking lots, riverside sites and critical infrastructure. The range covers residential, commercial and municipal flood control in two systems: self-filling Floodstop barriers in 19.7 in and 35.4 in heights, and the lightweight FloodFence barrier, each with its own corner units. Compared with sandbags, the units are light to handle, connect to one another and go down with far less labor. Holding water at the opening reduces water intrusion and the cleanup and repair that follow a flood.
Types of flood barriers
The two Floodstop heights are water filled flood barriers for deeper water and higher-risk openings, while FloodFence is the choice where light weight and fast handling count for most.
Floodstop 19.7 in self-filling flood barrier
The 19.7 in Floodstop flood barrier is the general-purpose unit in the range, sized for doorways, driveways, yard entrances and the perimeter of homes, worksites and smaller commercial buildings. Because it is self-filling and lower than the heavy duty unit, it is quick to carry and lay over a long run.
Floodstop 35.4 in heavy duty flood barrier
The 35.4 in heavy duty Floodstop barrier is for openings where water gathers deeper or where an intrusion would cost the most, such as underground access points, loading bays, parking lots and riverside construction zones. Choose it for critical infrastructure and for long-term flood planning on sites that flood repeatedly.
FloodFence lightweight modular flood barrier
The FloodFence lightweight flood barrier is the lightest unit in the range and is laid without ballast, so a crew can load, carry and position it quickly. It suits emergency response, contractors who move barriers from site to site, and property owners who want protection they can bring out and put away without lifting equipment.
Corner and multi-hub units
A barrier line needs a corner unit wherever it turns, closes against a building or wraps around an area, and each system has its own. The 19.7 in Floodstop corner multi-hub makes angled turns and watertight wall connections for the lower Floodstop units. Taller lines turn on the 35.4 in Floodstop corner multi-hub, which also ends the run at walls, entryways and fence lines. FloodFence runs change direction with the FloodFence corner unit, which redirects water around angles and structures.
Reusable flood barriers or sandbags
On sites that flood more than once, a reusable flood barrier system cuts the work before, during and after every event, and the difference shows most in the hours before the water arrives. Sandbags need sand delivered and a crew to shovel, tie, carry and stack them in several courses to reach a useful height, all while the warning period runs down. Temporary flood barriers from the modular range arrive ready-made and are carried to the opening empty, so the work at deployment is placing and connecting units.
The difference continues after the water drops. Sandbags that have sat in floodwater are usually discarded, because the water carries sewage, fuel and silt into the fill, and disposing of them adds to the cleanup. Modular units are drained where they hold water, washed down and put back into storage for the next event.
The modular range is the right buy for repeat-risk sites, for planned seasonal protection, and for municipalities and contractors who keep a stock ready to send out.
Flood barriers for homes, businesses and jobsites
Homes, doorways and driveways
A doorway or garage door is a short run, and what matters most is the closure at each side, where corner units seal the line against the wall. Driveways are wider and often slope toward the house, so the line crosses the full width at the street end or at the garage and ties into walls or rising ground at both sides.
Commercial buildings, loading bays and parking lots
Commercial openings are wide and carry traffic, so barriers stay in storage until a warning is issued and go down once deliveries stop. Loading bays and ramps sit below the surrounding ground and collect water first, and the barrier there is sized to the depth at the bottom of the ramp.
Construction sites and riverside work
On a jobsite the barriers protect open excavations, basements under construction, stockpiles, heavy equipment and site offices, and the layout moves as the work moves. Riverside construction zones and work in low ground near creeks and drainage channels need a line that can be extended or relocated between phases, which modular units allow. Floodstop is used alongside water filled road barriers and plastic traffic barricades, which mark out and contain the work area while the flood barriers hold water back at its edges.
Municipal and infrastructure flood response
Municipal teams and emergency planners hold stock centrally and send it where a forecast points, so transport, handling and visibility on public streets matter as much as height. The red and white Floodstop finish stands out on roads and sidewalks.
Planning a temporary flood barrier layout
Height against expected water depth
The barrier needs to be taller than the deepest water expected at the opening, with a margin for waves from passing vehicles and wind. Past high-water marks, local flood maps and the level of the lowest door, vent or ramp give the figure to work from. Heights across the range run from about 18 in with FloodFence to 35.4 in with the heavy duty Floodstop, and the deepest point on the line sets the height for that stretch.
Run length and unit count
The run is measured where the barriers will actually sit, wall to wall or high ground to high ground, following the building face or curb line instead of the straight width of the opening. Units overlap at their joints, so the run is divided by the connected length given on each product page, rounded up, and topped up with a spare or two for damage or a longer line than planned.
Corners, wall ends and changes in height
Each change of direction and each point where the run meets a wall takes one corner unit, and marking those points on a site plan gives the corner count. The two Floodstop heights join through a separate adapter, so a line can step up at a low spot such as a ramp or loading bay and step down again where the ground rises, without running the taller unit along the whole length.
Ground surface and preparation
A barrier line is best planned across firm, even surfaces such as concrete or asphalt where the site allows, with stones, gravel and debris cleared from it before the units go down. Drains, grates and utility covers inside the protected area need checking too, since water can rise through them behind the barrier, and an area with no other outlet needs a pump on standby.
Storage between floods
Heavy duty Floodstop units nest inside one another for compact off-season storage, and FloodFence units stack on pallets, and both are best stored clean and close to the openings they protect. Because barriers are ordered ahead of need, the time to buy is before the flood season, followed by one full test-lay of the layout: it confirms the unit count, shows where each corner goes and lets the crew practice before a real warning.
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Frequently Asked Questions
A self-filling barrier such as Floodstop is set out empty, which keeps it light to carry, and draws in water as the flood reaches it. The weight of that water holds each unit down while the multi-hub connections hold the line together. Nobody has to fill the units by hand or with a hose before the water arrives.
Floodstop barriers and corner multi-hubs are molded from low density polyethylene, and FloodFence units are made of ABS plastic. Both are rigid plastics that do not absorb water, so the units are washed down after each event and stored for reuse.
No. Floodstop and FloodFence units connect to one another without bolts, tools or ballast, and nothing is fixed into the ground, so the surface is left undamaged when the line is taken up.
Yes. Both Floodstop heights are designed for deployment by one person with no specialist equipment, and FloodFence units are light enough to carry one at a time.
Filled Floodstop units remain secure in exposed conditions, because the water inside gives them their weight. The heavy duty Floodstop also uses weighted joining keys at its connections and changes of direction, which keep the line joined along exposed stretches.