Underpinning requires exact, meticulous planning, paying attention to detail and meticulously following safety procedures are essential; poorly carried out underpinning could ultimately lead to serious damage to a building or even it’s collapse.
Stonehall Building Services Ltd offer two types of underpinning methods; Traditional Underpinning and Piled Underpinning.
Underpinning may be required for a variety of reasons, the original foundation is simply not strong or stable enough, the usage of the structure has changed, the properties of the soil supporting the foundation may have changed, to add extra depth to a room or to add a basement.
Building regulations approval is normally required if you want to underpin an existing foundation. A structural design for the underpinning, including details of the construction process, will generally be needed. Before any major underpinning work starts, a trial hole will be dug next to the existing foundation for a structural engineer or surveyor to assess exactly what is required.
A typical method is for short sections of underpinning to be separately installed; depending on how much of the fountain needs underpinning, it is sometimes possible to install more than one section at a time.
Before each section of underpinning is concreted, it will normally be inspected by a design engineer and a building control surveyor. A sand and cement packing will usually be packed between the existing foundation and the underpinning to ensure support and fill in any voids; this will also be inspected by a engineer or a building control surveyor.
We work closely with structural engineers, architects, private home owners, building contractors, insurance companies and local Authorities.
Stonehall are providing unmatched piling advice and expertise on commercial, domestic and industrial construction projects throughout the UK. Although a small, independent firm, we have successfully completed hundreds of projects across the UK as contractors and sub-contractors working with some of the best-known names in the construction industry.