How rock quantity is calculated
Like mulch, rock coverage is calculated using the square footage of the bed and the desired depth, then converted into the volume of material needed.
Base materials and weed barrier
Some rock installations include a base layer or weed barrier beneath the rock, which affects both the prep work and the total materials needed for the project.
Getting an accurate measurement
Bed shapes vary, so the most accurate way to know how much rock your property needs is to have the area measured and quoted directly.