How to Keep Flood Water Out of the House

How to Keep Flood Water Out of the House

Installing flood mitigation products is the best way to protect your house from flooding. There are a range of measures you can take, including the installation of  non-return valves, anti-flood airbricks, flood barriers and flood doors.

Take the following steps to protect your house from flooding:

Survey your property for areas of potential water ingress

Walk around your property and assess any areas where flood water could enter your property. Make a note of how many doors, airbricks or cracks in the wall. If you would like an expert to survey your property, contact us for more information.

Measure the width of doors, garage doors and driveway

Whether you choose a flood door or flood barrier, you will need to take the brick to brick measurement to get an accurate quote for the product. The brick to brick measurement is the distance between where the door frame meets the wall each side of the opening.

Please note that flood barriers will be the only product available for garage doors and driveways.

Check your flood risk

The next step is to check your flood risk. If you have been flooded before, how high did the flood water come? If you don’t know, checking your flood risk with the Environment Agency would give you an idea of how high flood waters are likely to come. If you do not know your flood risk, and potential water depths, the UK standard for flood protection is 600mm.

Install a flood barrier or flood door?

What is a flood door?

A flood door is a conventional door with adjustments to slow the ingress of water. A key difference is that flood doors are heavier than normal doors so they can withstand water pressure. They also have a gearing mechanism which pulls the door into the frame and engages the flood seal, a flood door is passive flood protection because it is permanently installed and requires minimal human intervention. Flood doors can be single or double (french doors).

What is a flood barrier?

A flood barrier is demountable flood control product which is deployed in a flood event. The barrier includes permanent upright fixings either side of the door, and a panel which slides down the fixings. The barrier can be made from aluminium or composite material. A crucial benefit for a flood barrier is they can be installed on your garage, driveway or doors. Some additional considerations are required:


Flood barriers for driveways

Flood barriers require a smooth flat surface to seal against. For driveways, it worth considering your current driveway, is it flat? And, is a solid surface available? If not, can a concrete plinth be laid to level the ground and create a smooth surface?


Flood barriers for garage doors

Garages can be busy places with lots of belongings. If you need to protect your garage, you need to consider the ground conditions. Are vehicles going to be consistently going in and out of the garage? If so, the ground may crack and therefore installing a metal plate for the flood barrier to sit on is advisable.

Anti-flood airbricks

Terracotta anti-flood airbrick

Anti-flood airbricks are designed to let air ventilate under your property and prevent mould and damp. However, traditional air bricks will allow water into your property into a flood. Replacing standard bricks with anti-flood air bricks is a simple task. Anti-flood air bricks include a flap which is open in the normal conditions but is pushed closed by water pressure in a flood event. You can chose the colour of anti flood airbrick to match your existing look.

Anti-flood non return valves

110mm (4") & 160mm (6") non return valves

Anti-flood non return valves stop your bathroom from suffering from backflow. Backflow arises when flood or storm water gets into the drainage system and causes pressure to build up in the drains. As the pressure rises, sewage is pushed drain pipes and into your property. This can be prevented by installing a drainage non return valve, which includes a single flap which is closed in the normal situation, preventing water from backing up the drain. If water pressure build up inside the property, the flap will open and let foul water out of the property. Drain non return valves are also effective rat protection, as they include a stainless steel plate in the flap.

Pointing and sealing

The final consideration is any gaps in your house where water can ingress. Taking a close look at the pointing and where entry cables enter the property is essential to protect your home from flooding. We would recommend sealing any entry gaps with silicone, such as CT1

Following the above steps will help to protect your home from flooding. If you need further advise, contact us.

Flood defense specialists

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    We source products from all the major flood protection manufacturers to find the best solution for your home. All the products and solutions we install have been tested and certified for their effectiveness.

    • BSI Kitemarked Floodguards
    • Floodtite
    • Floodgate
    • Rapidam
    • K50 barrier
    • Flood Safety Doors from Aquobex.

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