Typically Asphalt Millings are only used on driveways. Due to their asphalt/tar-like appearance, they are not often used in patio or walkway applications.
Although Asphalt Millings pack very well and solid, they are NOT a structural material - meaning they must be applied on top of a solid sub-base surface.
Asphalt Mllings are strictly a "Top Coat."
The strength of the Asphalt Milling surface is ONLY as good as the substrate itself. (The surface it is applied on)
What that means is when using Asphalt Millings, they must optimally be applied to an already-compacted base such as an existing driveway. If you are looking to expand your driveway or parking area using millings, its not as simple as throwing down some millings on your dirt.
For optimal results, the surface must be properly prepared as follows :
- Excavate 3"-6" depth in area
- Apply Landscape Fabric ("Road Paper") to prevent the gravel material from sinking into the dirt substrate layer.
- Spread a solid 2-4" of Gravel Road Base to provide a stable base for the Asphalt Millings top coat
- Apply Asphalt Millings as 2-3" Top Coat and Compact if desired.