Install Geotextile Fabric

What happens here

After excavating and compacting the foundation, the next crucial step is to line the excavated soil walls with a geotextile fabric. This fabric acts as a barrier, preventing the surrounding soil from mixing with the drainage stone that will be placed behind the wall. Over time, soil can migrate into the stone, creating 'mud-rock' which impedes drainage and compromises the wall's stability. The speaker highlights that this step is often skipped by contractors, leading to premature wall failure.

Goal: Prevent soil migration and maintain proper drainage behind the retaining wall.