Morning,
I recently had a termite barrier quote. It soon became apparent that a barrier could not be placed along south facing side of the house, as there is no concrete drain. In previous renovations a make shift drain comprising small rocks, etc. were placed against the concrete slab/besser blocks, and above the physical termite metal barrier (gee, have I explained clearly?). Consequently, I need to go 800/900ml below the physical termite barrier and drain catchment water to main outlet drain. My question is: am I best to employ a concreter or a landscape gardener? I have attached several photos which will help you better understand my situation. Looking forward to hearing from you. Any help/advise would be much appreciated. Thanks Bunnings for your continued support.

