Ideally a drain is going to be about 200mm wide and 600mm to 900mm deep, having a layer of 20mm tested gravel covering to around 100mm underneath the ground surface. A layer of shade cloth or similar on the top from the stone can help prevent soil leaking with the stone, with grime getting used to accomplish the backfill.
Should you make an effort to fix a gutter on your own make sure to work securely. It may be very harmful working off steps without needing proper scaffold or perhaps a safety harness. http://largescaleinterflow.com
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