I have a concrete drive on the front of my house which currently has on each side grass and plant borders. When getting in and out of the car when it's raining the grass has been getting waterlogged and the mud then walks into the house.
I was intending on bordering the plant beds with log roll edging and then filling the areas next to the concrete drive with 30-40mm deep of 6-10mm gravel laid on a plastic membrane. I have read that gravel paths used for foot traffic should have a sub layer of a 75-100mm layer of crushed stone, hardcore or DTp1 in addition to the plastic membrane under the gravel. Is this sub base necessary for this area considering it will receive very little foot traffic (getting in and out of car basically) or would just the plastic membrane be sufficent?
Any suggestions would be appreciated.