I need to re-do the base of my outdoor arena. I have found that a compacted and crowed base doesn’t drain well enough and want to create a better drainage system. I’m getting conflicting advise from contractors. My ring gets high traffic (boarding/training facility) and the natural soil is clay.
Can anyone tell me what kind of drainage pipe you have used under your arena to create french drains? Is is black corrugated pipe, PVC or something else? I don’t want to put in anything that will get crushed.
Most contractors suggest:
- 4" pipe covered in drainage cloth every 30’
- 4" of laser leveled, compacted, clean stone 1.5 - 2" size
- geotextile fabric
The conflicting opinions arise after the fabric layer. Contractor 1 says to put the footing directly on top of the fabric. Contractor 2 says that a compacted stone dust base of 2-3" should go on top of the fabric before the footing. The logic is that the stone dust will protect the geotextile from the drag in case the footing moves or if a horse’s foot penetrates the footing. He is afraid the fabric will get caught and rip. Contractor 1 says the compacted stone dust will prevent water from going into the drainage layer and makes all the pipe and drainage stone useless. I can see pros and cons to each.
Anyone out there with a set up like this that works well and has held up to high traffic? Thanks in advance for any suggestions.