2018 saw an uncharacteristic six week long heatwave. This hot spell led to a surge in subsidence claims from both homeowners and building owners. The Association of British Insurers (ABI) said the ‘357% increase in the value of claims was the highest quarterly jump since records started more than 25 years ago.’[1]
The heatwave conditions affected many building foundations as sustained warm weather caused water from subsoils to dry out, resulting in shrinkage. When shrinkage occurs the ground can no longer support the building, the foundations gradually move downwards, causing the property to sink in one area or across the entire foundation footprint; this is subsidence. Warning signs include problematic wall cracks which will typically start at windows, doorways or corners of buildings and if they are larger than 5mm then professional advice should be sought.
In the event that 2019 proves to be another dry summer, homeowners should fix any outstanding subsidence issues their home is experiencing. Key considerations to keep in mind:
Drainage, Pipes and Guttering
Poor drainage systems and leaky pipes can cause varying moisture levels in some clay soils which can shrink, or crack and shift during hot weather, and expand during wetter seasons. Proper maintenance is essential; make sure drains are free-flowing and ensure guttering doesn’t become clogged-up, leak, or overflow.
Tree Roots and Shrubs
Trees and shrubs need large amounts of water to survive. If there is a tree close to the property, the homeowners should make sure it is managed and maintained to ensure it does not become a problem. For those unsure whether a tree could be causing damage, seek professional advice.
Ground engineering experts Mainmark urge those owners to look for the warning signs, act now, get ahead of the game. By ensuring the above are addressed, a building’s risk of subsidence this summer can be greatly reduced.
Should a property subside, it is important to know that there are more advanced solutions available besides traditional concrete underpinning. To find out more about Mainmark’s award-winning solutions please visit: https://mainmark.com/uk