The 2 Leaf External Wall Estimating Calculator is a flexible wall estimating calculator which estimates the material, labour and plant required to construct an extensive range of double skin external walls. Using this estimating calculator, you can estimate wall assemblies constructed from various combinations of:

  • Brickwork
  • Blockwork
  • ICF
  • SIPS
  • Timber frame
  • Stone

You can also select from a range of external finishes, including: 

  • Fibre cement cladding
  • Timber cladding
  • Render
  • Stone cladding

Take care when selecting the wall assembly. Assemblies labelled “Extension/Renovation” are suitable for an extension or renovation project. Wall assemblies without the Extension/Renovation label should be used for new build projects. For garages, select a wall assembly labelled “Garage”.

From the Wall Dimensions Wizard, you can swap any of the wall mini-spec options including the external and internal leaf, internal finish and decoration, and the details below DPC. If parapets are required, you can also specify the options for them as well. Set any items which aren’t required to “Not Required”.

Using the tabs across the top of the screen, review the dimensions and estimating options for the walls, openings, gables, parapet and so on. 

The information taken from the wall specification options, along with the dimensions set in the Wall Dimensions Wizard, will be used to calculate the following items:

  • All Materials, as determined by the chosen wall assembly and mini-spec options.
  • All Labour associated with the above.