Linked to:  Protection - Bund Walls & Renewables & Recycling - Anaerobic Digestion (AD)  Bund

Bund walls also known as bunding are retaining walls constructed around storage areas where flammable, toxic and hazardous materials/liquids are handled, processed or stored. Control of Pollution Regulations require a reliable secondary or sometimes tertiary defence system designed to retain the potential polluting substances in the event of leaks or spillage from pipes, drums or tanks until remedial action can be taken. This prevents the substances causing any damage to the surrounding area even in the event of a catastrophic failure of the storage unit.

Precast concrete is becoming an increasingly popular choice in the construction of bund walls or bunding. This is due to its versatility and reliability, but also is a simple ‘water-tight’ and cost-effective solution. Concrete bund walls are ideal where there is a requirement to retain large volumes of liquids, but are not suitable for strong acids; however, choice of the material used depends on cost, the chemical properties of the liquid and its density.


Bund walls are generally required to contain the greater of either 110% of the largest tank capacity or 25% of the total tank capacity.  They can be either left open or enclosed with a roof; however, each situation has various factors that need to be considered. For example, for open bund walls rainwater collection needs to be considered in the calculation of capacity and where combustible materials are stored allowance should be made for firefighting foam/liquid. For bund walls with a roof, adequate ventilation must be considered when storing flammable liquids.

The following questions should be considered:

  • What type of liquid is being stored?
  • What capacity does the bund wall need to contain?
  • What is the wall height and dimension of the bund wall? Taking in consideration a tidal wave effect by catastrophic failure or spigot flow? (A leak in the wall in the tank could pass over the bund wall)
  • Are you looking to have an open or closed bund wall?
  • What maintenance of the bunds wall is required, particularly if located in remote locations or wintery conditions with ice/snow?


More information regarding the design requirements of a containment system can be found at CIRIA.


Different rules apply for Pesticides – consult BASIS Registration Scheme.



  • Larger areas - awkward site layout or high backfill loads
  • Sites without a concrete floor
  • Low wall height containment areas – cost effective up to 2m high


Prestressed and Precast Concrete Bund & Anaerobic Digestion (AD) Bund Walls

There are 2 wall systems to choose from for Bund Walls:

Cantilever - Vertical Prestressed Precast Concrete Retaining Wall

Panels set vertically into a foundation 550m deep & tied in using cradles and reinforcing bars supplied.


Ideal for

R35 Cantilever Vertical - Large Format Precast Wall Panels

Large format precast wall panels positioned vertically or horizontally. A single panel can be manufactured 3200mm high and up to 10m in length.

Ideal for


Here to help...

If you are unsure about any of these questions or have any further questions, please contact us to discuss your requirements in more detail.


We have the experience and knowledge to help and support you throughout the full process from design, construction and installation to ensure your final solution is fit for purpose.

Our Prestressed and Precast Concrete Design and Installation Service

There are 2 wall systems to choose from for Bund Walls: