chapter  15
Internal walls
Pages 3

In my experience, nowadays, most Building Control Departments query the use of slab thickening (unless engineers’ calculations are supplied) and require the blockwork partitions (whether load-bearing or otherwise) to be taken down to a proper foundation similar to the external walls. As the blockwork in internal partition walls does not usually carry the same sort of loading as the external walls, and as the blockwork in partitions is normally only 100 mm thick, the footing can be slightly narrower than a footing that supports a cavity wall.