Underpinning a basement Underpinning a basementUnderpinning a basementUnderpinning a basement

We provide Cellar & Basement Conversion Excavation and Underpinning in the following locations:

North Yorkshire: Harrogate, Ripon,Thirsk, Knaresborough, York, Skipton, Catterick, Richmond.
West Yorkshire: Leeds, Halifax, Wakefield, Bradfield, Ilkley, Huddersfield.
South Yorkshire: Sheffield, Rotheram, Barnsley, Doncaster, Hatfield.
Teeside: Newcastle, Sunderland, Middlesborough, Durham, Darlington, Newton Aycliffe, Hartlepool.

If you are outside these areas, please contact us.

Excavation and Underpinning

underpinning cellar conversions

If your cellar does not have enough headroom to enable it to be made into a liveable space, or indeed you have no cellar space, Barrett Kent can lower the foundation through underpinning.

Underpinning is a method of extending the existing foundations in depth or width for a variety of reasons:


basement conversion excavation

Barrett Kent will excavate short sections of soil from beneath the existing foundation in a planned sequence.


basement conversion underpinning

Concrete is then poured into the excavation to a level close to the underside of the existing foundation.Once initial cure and shrinkage has occurred, dry packing the gap with a mixture of sharp sand and cement transfers the load. The adjacent pins are then excavated and constructed in the same way until the complete length of wall is underpinned forming a new foundation.

In all cases a fully qualified structural engineer will visit the site and draw up a pin schedule following this, the structural engineer and local authority-building inspectors will periodically inspect the project as work commences with the final sign off at completion. Once the excavtion and underpinning has been completed, a full basement conversion can be undertaken.