The Extension Slab Estimating Calculator allows you to build up layers of Labour, Material and Plant that go to build up a typical extension slab.

The Extension Slab Estimating Calculator calculates the following items:

  • Preparation of substrate
  • Subbase
  • Damp proof membrane
  • Concrete slab
  • Associated plant
  • Plus all labour associated with the above

The Extension Slab Estimating Calculator is linked to the Specification.

NOTE:

  • You must enter any lump sum items such as plant.
  • It is assumed in this Estimating Calculator that the site level has been reduced prior to preparation of the slab using the Site Strip Estimating Calculator.