Gravel layered at the bottom of an excavation to insure drainage of water.
Gravel Mulch
A protective covering of rock particles, used on the ground to reduce evaporation, prevent erosion, and control weeds.
Level the earth or gravel layer at the bottom of the bed, then put down a layer of weed-suppressing landscape fabric that extends to the outer edge of the wooden frame. Now is also the time to think about pest control.
Staymat or crushed stone with fines should be rolled on top of the gravel layer. The jagged edges of crushed stone will allow the aggregate to pack better than the round shape of gravel.
When a drainage system is used on a residential site, it is normally a mixture of a gravel layer alongside a residential foundation drain and a drain tile.
5) Add drainage backfill
After the first few courses of stone are laid, begin adding gravel as drainage backfill behind the wall. Try to keep the gravel layer at least 6 inches thick. (Fig. 5)
Fig. 6 ...
People who have RV's, and trucks often want a thicker layer of asphalt to support the weight of these vehicles when in fact it is the crushed gravel layer that should be increased in thickness as it is this layer that actually supports the weight of ...
 See also: Gravel, Ground, Water, Building, Landscape
  
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