Roll out
Two responders carry the rolled-up element to the incident scene and roll it out.
Heavy rain gives no warning
Up in seconds: your protective line.
Roll out, position: the oncoming water raises the Lenoir® Water Barrier by itself and presses it onto the ground. The higher the flood, the more stable it stands.
Over 1,400 units in use across Europe · EVH-certified · Developed and made in Switzerland- Up to 1 m damming height
- 2 responders are enough
- Freely connectable
- Instantly reusable
Request a quoteReply within 24 h. Purchase on account for fire departments and authorities
The idea
Water stops water.
The heart of the system: no pump, no generator, no setup team. Physics does the work.
-
Oncoming water
The water flows onto the lower leg of the flap barrier and fills it: the retaining wall rises by itself.
-
Water weight pins it down
The weight of the dammed water presses the barrier onto the ground. More water means more contact pressure and a firmer hold.
-
Wide footprint
It seals and keeps the barrier in shape, even on paving, grass and varying ground.
-
Height by type
The upper leg defines the usable damming height: from 15 cm (LWS 15) to 1 m (LWS 100).
Your shortcut
What to protect?
Jump straight to your protection goal for the right version. We plan length and options with you.
Garage & driveway
Secure ramps and thresholds against shallow incoming water
Buildings & thresholds
The protective line right at the building
Streets & areas
Divert water and guide it in a controlled way
Banks & streams
Secure banks, dam up streams
Firewater retention
Hold contaminated water at the incident scene
safety made simple
Three moves, then the water works.
No sand, no power, no heavy equipment: the barrier uses the force of the very water it is meant to hold back.
Position & connect
Lay it out straight or in an arc, connect as needed: protective lines in any length required.
The water takes over
The oncoming water fills the barrier, raises it and presses it onto the ground. The more water, the more stable.
Our advice
From your goal to the right version.
The recommendations are based on the usable damming height. Not sure? We size your system after a site survey.
Garage & driveway
Ramp sealed in seconds
Stop shallow incoming water at ramps and entrances, on asphalt and paving.
LWS 15 / 35: damming height up to 15/35 cm
Buildings & thresholds
Guarding the building
Secure doors, thresholds and facades: the barrier adapts to the ground.
LWS 35: damming height up to 35 cmStreets & areas
Channel water, don't flood
Shield streets, divert water where you want it: connectable to any length.
LWS 35 / 50: damming height up to 50 cm
Banks & streams
Riverbank & reservoir
Secure riverbanks or dam up a stream into a firefighting water reservoir.
LWS 70 / 100: damming height up to 1 m
Fire department & environment
Firewater retention
Contain contaminated firewater before it reaches a watercourse. For hazmat: antistatic version.
LWS 50: with optional drain opening
Failure
Burst pipe & hydrant damage
Contain escaping water in seconds and slow it down.
Proven in real use
In action when it counts.
No studio shots: real incidents and wet drills with fire departments in Germany and Switzerland.
1.400+
units in use across Europe
EVH
certified by Europaverband Hochwasserschutz e. V.
CH
developed and made in Switzerland
−30 / +70 °C
temperature-resistant PVC polyester fabric
The system
Five heights, one system.
Flap barriers with two legs: the upper leg defines the damming height. All figures are approximate values according to the manufacturer (Lenoir AG).
- Elementlängen
- 5 · 10 · 15 · 20 m
- Leergewicht (10 m)
- approx. 15 kg
- Ersetzt Sand (10 m)
- 1,500 kg
- Integrated weights
- Anti-slip strips
For shallow incoming water at door thresholds and driveways.
- Elementlängen
- 5 · 10 · 15 · 20 m
- Leergewicht (10 m)
- approx. 20 kg
- Ersetzt Sand (10 m)
- 7,000 kg
- Optional weights
- Optional anti-slip
For streets and property protection in heavy rain.
- Elementlängen
- 5 · 10 · 15 · 20 m
- Leergewicht (10 m)
- approx. 15 kg
- Ersetzt Sand (10 m)
- 12,000 kg
- Optional weights
- Optional drain opening
For higher water levels and firewater retention.
- Elementlängen
- 5 · 10 · 15 m
- Leergewicht (10 m)
- approx. 45 kg
- Ersetzt Sand (10 m)
- 15,000 kg
For critical facilities and riverbanks.
- Elementlängen
- 5 · 10 · 15 m
- Leergewicht (10 m)
- approx. 60 kg
- Ersetzt Sand (10 m)
- 35,000 kg
The maximum protective wall: up to 1 m damming height.
All types can be connected, each to the next smaller and next larger type. A sandbag roll for extra weight is also recommended. Price based on sizing.
LENOIR® Water Barriers: Technical Data
Flap barriers with two legs: the upper leg defines the damming height.
| Typ | LWS 15 | LWS 35 | LWS 50 | LWS 70 | LWS 100 |
|---|---|---|---|---|---|
| Maße | |||||
| Nutzbare Stauhöhe | bis 15 cm | bis 35 cm | bis 50 cm | bis 70 cm | bis 100 cm |
| Elementlängen | 5 · 10 · 15 · 20 m | 5 · 10 · 15 · 20 m | 5 · 10 · 15 · 20 m | 5 · 10 · 15 m | 5 · 10 · 15 m |
| Durchmesser, 10-m-Element gerollt | 30 cm | 35 cm | 40 cm | 50 cm | 65 cm |
| Koppelbar mit anderen Sperren | Ja — jeweils mit dem nächst kleineren und/oder nächst größeren Typ | ||||
| Gewichte | |||||
| Leergewicht, 10-m-Element | ca. 15 kg | ca. 20 kg | ca. 15 kg | ca. 45 kg | ca. 60 kg |
| Ersetzt Sand (10-m-Element) | 1.500 kg | 7.000 kg | 12.000 kg | 15.000 kg | 35.000 kg |
| Zusatzausstattung | |||||
| Integrierte Gewichte | ✓ Standard | ✓ auf Wunsch | ✓ auf Wunsch | – | – |
| Antirutschstreifen | ✓ Standard | ✓ auf Wunsch | – | – | – |
| Öffnung für kontrolliertes Abfließen | – | – | ✓ auf Wunsch | – | – |
| Rollsandsack zum Beschweren | Zusätzlich zu empfehlen | ||||
| Material | |||||
| Stoff | Polyester-Gewebe, beidseitig PVC-beschichtet; temperaturbeständig von −30 °C bis +70 °C | ||||
| Stoffgewicht | ca. 900 g/m² | ||||
| Reißfestigkeit (auf 5 cm) | > 550 kg | ||||
Cost-effectiveness
You pay for sandbags twice.
Once for filling and hauling, and again after the operation, when soaked bags have to be disposed of as hazardous waste.
-
Cost-efficient
Reusable instead of hazardous waste: minimal life-cycle costs.
-
Fast
Rolled out in seconds: the water raises the barrier by itself.
-
Uneven ground
From paving to grass: effective where rigid systems fail.
Request a quoteReply within 24 h
Sandbags or Lenoir® Water Barrier?
Choose the damming height and length of your protective line: the calculator shows how many sandbags you would need and how few Lenoir® elements achieve the same protection.
Bitte eine Staulänge von mindestens 1 m eingeben (halbe Meter erlaubt, z. B. 12,5).
- Aufbau: viele Helfer, stundenlange Arbeit
- Nach dem Einsatz: Entsorgung als Sondermüll
- Ausrollen genügt – in Minuten einsatzbereit
- Wiederverwendbar, keine Entsorgungskosten
Sandsackbedarf nach THW-Berechnungsmethode (Pyramidenaufbau, Richtwerte). Tatsächlicher Bedarf kann je nach Untergrund und Einbausituation abweichen. Lenoir-Produktdaten: Herstellerangaben (ca.-Werte).
Logistics & storage
Complete heavy rain protection in one box.
Rolled flat, protected and stored dry, with no bulky components and no loose small parts. That saves storage space, simplifies inventory and speeds up logistics.
- 10 m element: roll diameter from 30 cm
- Box onto the vehicle: roll out, done
- Ideal for fire departments, public works yards and companies with little storage space
Advice & briefing
We plan your protection on site.
Site survey, hazard and ground analysis right at the property, from line protection to building protection. Optionally with briefing, wet drills and a logistics concept, so your crews act safely in a real emergency.
- Site survey and sizing at the property
- Briefing and wet drills for your crews
- Quote with line items and lead time
Request a quoteReply within 24 h
Procurement
From site survey to delivery
We work with fire departments, THW (Germany's Federal Agency for Technical Relief), municipalities and companies, and know every step from needs assessment via the quote with line items and lead time to the on-site briefing.
-
Purchase on account
For municipalities, volunteer fire departments and emergency services units. XRechnung and compliant PDF invoices available.
-
Lead time
Depends on type and quantity: binding dates are stated in your quote.
-
Briefing & training
Instruction, site survey and wet drills for your crews, on request right at your site.
Price based on sizing: depends on type, length and options.
Rescuevation: As seen in the trade press
Request a quote
A quote for your protective line.
Tell us what you want to protect: we plan type, length and options with you. You get a quote with line items and lead time.
- Purchase on account for municipalities, fire departments and emergency services units
- XRechnung and compliant PDF invoices available
- Site survey, briefing and wet drills on request
- Reply within 24 hours