Mobile flood protection protects your home from high water and storms such as flooding

Demountable flood barrier

Remain deeply relaxed when the flood comes: PREFA’s flood protection system keeps bad weather outside.

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  • Demountable flood barrier made of aluminium
  • Sealing the profile with replaceable UV-resistant EPDM foam rubber seals
  • Provides protection as soon as the first panel has been laid 


  • Aluminium barrier panels are pushed into the mounting profiles or upright (anchored in the ground sleeves)
  • Barrier panels are stacked on top of one another via the tongue and groove system
  • The components are fixed at the top by a compression clamp
  • The barrier panels fill up as the level of the water rises, preventing them from floating


  • Property and perimeter protection
  • The length of the safety barrier can be extended as necessary
  • Existing safety barriers can be extended following a static test
  • Individual adaptation of the length of barrier panels

The Advantages Of Prefa Flood Protection

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Can be installed by one person

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Made from robust aluminium

Lightweight & easy to store

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Quick & easy assembly

Icon for advantages

Can be installed by one person

Icon for advantages

Made from robust aluminium

Lightweight & easy to store

Icon for advantages

Quick & easy assembly

Technical information

Flooding is a natural phenomenon and cannot be prevented. However, modern flood protection systems can prevent flood water from causing a disaster. We would be delighted to advise you about PREFA’s flood protection systems!

  • 1. wall profile: Permanently built into the masonry or installed in front of, in or fitted flush in the reveal
  • 2. barrier panels: Illustrated here: the lowest barrier panel is connected to point 3.
  • 3. ground seal: Ensures sealing between the lowest barrier panel and the ground
  • 4. centre column: In larger areas, these uprights can be used as intermediate columns.
  • 5. compression clamp (with hex-head screw or with star-shaped handle): For clamping the barrier panels in place
  • 6. retainer: Prevents vertical deflection of the barrier panels and increases pressure on the ground seal.
  • 7. ground sleeve: Sleeve fixed permanently in the foundations with concrete for inserting the centre column
  • 8. wall bracket: For stacking the barrier panels during storage when not in use
  • 9. angular cover: For covering the wall profiles when not in use.
  • 10. storage casing: The individual sections (length: 445 mm) are screwed together.
  • 11. base profile seal
  • 12. barrier panel seal
  • 13. seal for cover and ground sleeve
Bestandteile des PREFA Hochwasserschutzsystems

Barrier Panels (Property And Perimeter Protection)

The panels are available in two thicknesses (50 mm und 80 mm). Taller designs and wider span widths are possible with the 80-mm system. The aluminium profile of the panels can be easily stacked together via the tongue and groove system. This ensures that they interlock, guaranteeing high stability and maximum security. Finally, compression clamps fix the whole assembly in place.

The profiles are available up to a length of 6.5 m and can generally be built up to a height of 3 metres. The static load must be calculated. The inserted system seal is made of EPDM foam rubber and can easily be replaced if necessary. After use, it is essential to clean and inspect the profile and seals to make sure that they can be used again in the future.

Dam beams of the PREFA flood protection system

PREFA flood protection dam beams are available in three different thicknesses. Depending on the thickness, they can be used for different areas.

Barrier panel thickness (50-mm system):

50 mm

Barrier panel thickness (80-mm system):

80 mm

Barrier panel weight/metre (50-mm system):

5.60 kg / 4.12 kg

Barrier panel height (50-mm system):

150 mm / 200 mm

Barrier panel joint (50-mm system):

15 mm

Mounting Profile (Property Protection) And Upright (Perimeter Protection)

The permanent mounting profiles can be installed in three ways: in the reveal, flush with the reveal, or in front of the reveal. Choose the mounting profile size suitable for the overall system and according to static requirements. Inserted system seals prevent water from penetrating.

Mounting uprights: The 50-mm system weighs only 9.4 kg, and the 80-mm system weighs 11.3 kg per metre. When installing the system for the first time, a ground sleeve should be mounted in advance on a suitable supporting structure. The uprights can be easily anchored to the ground sleeve with a bayonet locking device.

Fastening profiles for the PREFA flood protection system

Mounting profile for property protection

Ground sleeve for PREFA flood protection fastening posts

Mounting upright for perimeter protection

Centre column diameter:

140/186 mm

Centre column height:

750–2150 mm (special lengths available on request)

Centre column thicknesses:

50 mm or 80 mm

Ground sleeve diameter:

170 mm / 230 mm

Ground sleeve depth:

420 mm

Compression Clamp (Property And Perimeter Protection)

The panels are fixed at the top by compression clamps. The compression clamp screws are gently tightened using an Allen key (alternatively: screws with a cross handle). The compression clamps prevent the profile from floating until the panels fill with water, increasing the contact pressure of the seals. The compression clamps can be removed during use – and more panels can be added to increase the system if necessary.

Tensioning piece on PREFA flood protection

The tensioning piece is used to fix the beams of the PREFA flood protection from above. Attaching the tensioning pieces prevents the profiles from floating up until they fill with water.

Compression clamp length:

160 mm

Compression clamp weight:

0.45 kg

Possible uses

Property protection

With the special aluminium barrier panels, windows, doors and door openings through which water can penetrate can be quickly sealed off.

  • Permanent mounting of the mounting profiles flush with, or in front of, the reveal.
  • When used in the event of flooding, the barrier panels are pushed into the fastener and fixed at the top with a compression clamp.
  • Mounting profiles and barrier panels can be colour-coordinated with the façade.
  • Rapidly deployable, ideal for storing and easy to install individually with very little effort.

Perimeter protection

  • Safety barriers can be used as new constructions or to increase the height of existing protection systems.
  • When used in the event of flooding, the centre columns (supports) are anchored into the sunken ground sleeve and the barrier panels are then inserted. After use, everything can be easily removed again. Ground sleeves can be sealed with cover plates.
  • The safety barrier can adapted to the final level of the water at any time.

Demountable & individual

Planning and installation

For more information you can contact our experts, find a PREFA craftsman near you or send an enquiry via our contact form.

Find a flood protection system craftsman.

Order our free flood protection brochure.

PREFA planning guide for flood protection solutions

Questions and answers: PREFA flood protection

PREFA’s mobile flood protection in the aluminium barrier panel system is used to protect buildings and land. It is a reliable water and mud barrier even in extreme situations – from the Danube to the North Sea. Lightweight, robust and easy to assemble, aluminium barrier panels are stacked on top of each other in a tongue and groove system and inserted between two fastening profiles or uprights – in an emergency, they can even be installed by just one person.

PREFA flood protection is supplied by a regional PREFA partner company and is also professionally assembled straight away.

The length is determined according to structural calculations and depends on the water level.

A flood protection system does not have to be 100% watertight. Minimal water ingress is acceptable. With the PREFA system, the aluminium profiles are stacked on top of each other in a tongue and groove system and inserted into fastening profiles or uprights on both sides.

The system requires a load-bearing assembly substrate such as concrete or brick and should be checked in advance by a structural engineer if necessary.

The PREFA flood protection system has been tested and certified by the European Flood Protection Association. It complies with the basic principles for planning and use of the guidelines of the Association of Engineers for Water Management, Waste Management and Land Improvement (BWK). 

Yes, delivery is possible in the standard RAL colours. The barrier panels and the permanently installed fastening profiles can be individually colour-matched to the roof, doors and windows or the façade.

The low weight of the aluminium profiles allows for quick and easy assembly – if necessary, even by just one person! For example, it takes around seven to ten minutes to assemble a flood barrier if it is the size of a garage door (approx. 3 m wide and 1 m high).

PREFA flood protection consists of a total of 10 components.