Lay Filter Fabric, Drain Tile, and Rock
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20:02
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How to Install a French Drain: pricing, tools, setting elevations. 4k video
What happens here
Line the excavated trench with permeable filter fabric. This fabric allows water to pass through but prevents fine soil particles from entering and clogging the drain tile. Next, lay the corrugated, perforated drain tile into the fabric-lined trench. The video emphasizes using perforated drain tile that is flexible enough to handle angles and changes in grade. Once the drain tile is in place, cover it with a layer of washed rock (clean aggregate). The more rock and fabric used, the more effective and longer-lasting the system will be.
Goal: Construct the core drainage system within the trench.
Tools and materials
- Corrugated Perforated Drain Tile — Collecting and channeling water within the trench
- Grade Pole — Verifying elevations while laying components
- Permeable Filter Fabric — Lining the trench to prevent soil fines from clogging the drain tile
- Shovel — Distributing rock and managing fabric
- Washed Rock — Encasing the drain tile to create the drainage zone
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