Measuring floor area - BASIX (Building Sustainability Index)

The floor area in BASIX Thermal Comfort is measured from the inside of external walls, ignoring the area occupied by internal walls.

Measure the area of each floor type separately. The diagram below shows an example of the areas to be measured for combination types.

Example: For a combination slab-on-ground and suspended floor, measure the area of the slab-on-ground floor and the suspended floor separately. Measure from the inside of external walls and ignore internal walls. This diagram shows an example of the areas to be measured for combination types.