This is a common problem encountered in properties built between the 1960's and 1980's. It is normally the result of the builder either using poor quality fill material beneath the floor slab, or because of the poor compaction of the fill itself. There are several different solutions to the propblem, including grouting beneath the slab, removong the slabs and fill entirely and reconstructing them.

Our solution allows for the replacement of the slab only, with a properly designed reinforced concrete slab which is designed to span between the existing load bearing walls of the property. Therefore if the settlement of the fill continues there will be no further movement of the slab. This is often one of the cheapest solution and one normally favoured by builders.

Our structural calculations for this type of slab includes either a one or two way spanning slab depending on the layout of the building.

We need the following information to design this type of floor slab:

sketch drawings with dimensions, showing the size of the rooms and the supporting walls below

Design information

All designs are carried out in accordance with BS 8110 (The structural use of concrete).

The calculations provided will be suitable for Building Regulation approval.