Ancillary Flood Defence Products


Available Ancillary Flood Defence Products

You’ve just completed the installation of flood protection measures to the access doorways on your building, so you’re finished and completely flood protected, right? Wrong! You’ve done the first part, the obvious bits, but there are still a few other points of entry and ways that flood water can penetrate your building envelope and flood the inside. Here are a few other things that you should be considering, to realise a truly holistic flood protection solution at building level –

Waterproofing of Walls


Hydrostatic pressure can cause flood water to seep through walls at an incredible rate, up to 7 litres per metre per minute in fact, according to Government sponsored research!

Retrofit coatings, when properly and carefully applied to wall surfaces, can prevent or significantly slow the passage of water through a wall face.

Duct Sealing

Effective Duct Sealing: Protecting Critical Areas from Flood Damage

Many industrial, commercial and utility buildings have ducts, often below ground level, to allow cables and/or pipes to pass through walls and into internal rooms. 

Sealing of these ducts, thus preventing the passage of water, is paramount to ensuring that critical areas stay dry and flood protected. 

Duct sealing systems can be very easy to install, often using a tubular system with an accompanying wet seal, through which cables can be re-routed or new cables installed in the future.

Non-Return Valves

Anti-flood Valves: Your Defence Against Rising Water Levels

These valves, often called anti-flood or backwater valves, stop the flow of water and sewage into properties and sites via the below ground sewage and surface water drainage network, when those pipes become surcharged through rising water levels. 

Non-return valves are generally installed in the first manhole outside of a property boundary, or in the case of inline valves, often in a specifically constructed separate chamber.

Different types of valves are available, including push-fit, single flap and inline double flap.

Sumps & Pumps

Efficient Flood Water Removal with Submersible and Puddle Pumps

Flood water can enter a building even where there are flood barriers, floodgates or doors installed. This can be through walls, leakage through the barriers or even rainwater that manages to get behind surface mounted flood barriers. 

This is where a pump, with or without a sump, can be used, as it will limit the accumulation of flood water and remove it.
One of the simplest and most cost effective ways of pumping is to use a small submersible or puddle pump, which is often a more cost effective and flexible option than having a fixed pump installed. 

Puddle pumps are designed to pump down to very low levels and some can go as low as 1mm. They can be positioned anywhere you choose, but usually you’ll place it at the lowest point so that it removes the most amount of water possible. Simply plug the pump in, throw the discharge hose outside and switch it on!

Comprehensive Flood Protection

To truly safeguard your building from flooding, it’s essential to consider every potential entry point for water. Beyond the obvious measures like flood barriers and doors, paying attention to duct sealing systems, installing reliable anti-flood valves, and utilising efficient pumps can significantly enhance your flood defence strategy. 

By addressing these often-overlooked aspects, you can ensure that your property is thoroughly protected, maintaining dry and secure critical areas even in the face of rising water levels. Remember, comprehensive flood protection is not just about the visible defences but also about securing the hidden vulnerabilities.




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