6. Aggregate exterior cladding

6.1 Gravel surfacing

Whether for pedestrian, decorative or vehicular use, a gravel driveway is an advantageous solution.

Gravel can be derived from a wide variety of rocks, including quartz, limestone and marble. The colors and shapes are endless.

There are two types of gravel:

• rolled gravel: it has spent time in river water, eroding and taking on its soft, round shape;

• crushed gravel: this has greater mechanical properties than the previous type, but is rougher. This gravel is obtained by mechanically crushing rocks.

For a pedestrian walkway, a thickness of 10 to 15 cm is required (figure