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floor raised by around 23cm

Case study

Property Flood Resilience at a frequently flooded terraced house @ Worcester

Context

After extensive flooding (over knee height) in 2020, the owner-occupier of this Edwardian house in Worcester chose to build back better. This property floods regularly, it flooded every year for four years and a mixture of resistance and recoverability measures were put in place to the reduce the emotional and financial burden on the occupants of the house.

The owner was aware of its flood risk when she bought the property, her searches indicating it would flood every seven years or so. Unfortunately, her home flooded every year since moving in. During the worst flood in 2020, the flood water in her home was so deep she had to resort to wearing waders indoors. The property had flood barriers, but they were overwhelmed by the very intense flood. For this flood event, she had to make a large insurance claim of £45,000 and used it to adapt her home.

Contributor

Mary Long-Dhonau - Flood Mary

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What was done

  • Continued to use the slot-in flood barriers.
  • Knocked two rooms into one and concreted the floor, raising it by around 23 cm (9”) (Picture 1)
  • The floor was tiled using porcelain tiles with waterproof grout and adhesive, and the skirting boards were tiled. (Pic 2)
  • Two submersible pumps were fitted: one to the front of the house and one to the back in the kitchen. (Pic 3)
  • Waterproof plaster was used for the walls.
  • The first four steps to the internal staircase were replaced with stone. (pic 4)
  • A stainless-steel kitchen was fitted with the base units raised above floor level. (pic 5)
  • White goods are sited higher up in an enclosed cupboard.
  • A small dishwasher was raised up off the floor.
  • Living room storage cupboards were made of metal. (pic 6)
Type of flooding: River/fluvial
PFR process: General management and delivery, Preparation, Planning, Design, Construction, Operation/maintenance
Approach used: Resistance measures, Recoverability measures
Resistance PFR measure: Flood barriers/covers, Sump pumps, Sealing of walls
Recoverability PFR measures: Recoverable walls, Recoverable flooring, Recoverable location of services, Recoverable fixtures and fittings
Type of property: Residential
Funding: FDGiA, Insurance, Private
Procurement: Private

What was the impact?

Impact of flooding was reduced and the speed of recovery much improved compared to previous flooding.

The house was flooded again in 2022 and the steps taken proved their worth; only 5cm (under 2”) of water entered the home and she was able to hose it out, carry on living there, and not make an insurance claim.

Lessons learnt

  • Increased awareness
  • Re-design of the ground floor, with flooding in mind improved the quality of life during floods
  • The original assumptions from the owner that the flood risk was too low (1 in 7 years) to deserve this kind of investment proved wrong. The investment in PFR measures was worth it financially and brought peace of mind to the homeowner.

Gallery

“The homeowner knew this area was flood prone from living in Worcester prior to buying the house but did not realise it would flood this frequently or lead to such significant damage despite the flood barrier. After four years of successive flooding, she decided to make changes to her home to avoid being out of her home for weeks at a time and having to make insurance claims. The combination of increased resistance and high recoverability means the homeowner can now live free of flood anxiety. If she floods, she can clean up and continue living in her home.”

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Being prepared for potential flooding is an important element of being flood resilient as it leads to approaches to use PFR measures. It’s about understanding your flood risk, now and for the future.