9.12.1.1. Removal of Topsoil and Organic Matter

 9.12.1.1. Removal of Topsoil and Organic Matter 

This Article requires the removal of #topsoil and #organic matter from unexcavated areas.

 

This will help to make the space beneath a building inhospitable to #insect #pests and #vermin, and to keep it from generating objectionable #odours that might migrate into the structure above (see Figure 9.12.-1). 

For an additional level of insect resistance where #termites are known to occur, #stumps, #roots and other wood #debris must be removed to a depth of at least 300 mm (12 in.) in order to protect the structure.

Quoted from Illustrated Users' Guide -- NBC2015