Hi Can somebody tell what a stormwater drain is, and how i could link drainage from my garden to it, as due to a deep clay undersoil (metres!) a soakaway isn't possible.
Immediately to the rear of our house is a patio about 12 feet across which sits about 6 inches below the watermark of the house. this leads to a small lawn about 25 feet in length sloping upward on a gentle gradient away from the patio. the groud beneath the patio and lawn is solid clay for as...