This is a wonder product. One of our innovative solutions. By law driveways have to be permeable, if someone offers to tarmac or pave without talking to you about drainage and water tables, we advise you get another quote. You could be fined as it is against the law. We don't do half a job, we do it right first time. The fantastic clients who requested an unusual solution often catch people taking pictures of this and even had someone knock the door to ask about it.