I am after some clarification for Aco drain location. I have attached two pictures to show the Bifold doors which will have a sandstone pation with a fall toward a retaining wall.
The sides of the patio will be flanked by the side of the garage and then another small garden wall.
Originally I was planning on drains at the sides of the small walll and garage and then finally one at the bottom fall where the large retaining wall is. I dont think there is any need for one under the bifold if the fall is OK?
Is this overkill? Do I just need the one drain at the bottom?
The area is about 35m2 soakaway is connected at one end of retaining wall at bottom.
Thanks