Implement Drainage System with Drain Stone
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unskippable steps. #construction #hardscape #retainingwall
What happens here
A significant amount of 'clean drain stone' is placed behind the retaining wall blocks. This drain stone acts as a porous backfill, allowing any moisture or rainwater that finds its way behind the wall to pass through easily. This prevents water from freezing, expanding (frost heave), and pushing the wall outward. The speaker also mentions an underlying drain, likely a perforated pipe (French drain), that collects this water and routes it to a suitable discharge point, further enhancing drainage efficiency.
Goal: Prevent hydrostatic pressure and frost heave by effectively draining moisture from behind the wall.
Tools and materials
- Shovel — Moving and spreading drain stone
- Wheelbarrow — Transporting drain stone
- Clean Drain Stone — Providing drainage behind the retaining wall
- Geotextile Fabric — Separating native soil from drain stone to prevent clogging
- Perforated Drainage Pipe — Collecting and routing water from behind the wall