I will be installing a concrete paver patio in the near future, and recently dug 6 post holes in the area of the patio and discovered there is about 6" of topsoil/organic material, then a natural sand layer down almost 4 feet.
I am wondering if this sand layer which will be my sub-base (see cross-section below) will cause any issues with the pavers in the long-run, or if it is actually a good thing due to the drainage capacity of sand.
I plan to install the pavers based on this cross-section.
- Concrete paver ~2" (50mm)
- Polymeric joint sand
- Bedding sand 1" (25mm)
- Gravel base extended 6" (150mm) past paver extents
- Plastic retaining edge
- Landscaping spike
- 3/4" crusher run with stone dust
- Sand sub-base (pink area) and topsoil above
I was unable to find any relevant information on the installation of pavers over top a natural sand sub-base, many of the searches returned discuss the bedding sand (3) in the figure above.
Any information would be greatly appreciated.