Cobblestone Walkway, Patios and Driveways

 

Most photos can be enlarged by clicking on them.

All design work and installation by Green Art

 

 

Cobblestone usually consists of granite, basalt or Porphyry, all of which are very hard stones, and therefore cobblestone is extremely durable. Properly installed, it will make a very long lasting surface that can be used by vehicular traffic as well as by pedestrians.

 

The old cities in Europe, including my home town, often have remaining pavements of cobblestones in their old streets, and it is still installed - or reinstalled - today where an authentic look is being maintained. The typical layout was in a segmental arc pattern, which I have analyzed and described in detail (see 'Segmental Arcs'). It is the strongest and most durable of all cobblestone patterns.

 

 

     
  This courtyard is paved with cobblestone in the segmental arc pattern. The material used are the so-called 'cubes', which measure approximately 4".

Stones that don't fit, such as the ones along the lower edge, have to be 'cut' with a heavy, carbide-tipped hand chisel.

     
  The same material ('cubes') but a different layout have been used for this shaded patio. The edge is done with black basalt cobblestone.
     
The following photos are of a project where building code restrictions demanded for a permeable driveway surface in order to avoid water runoff. I proposed cobblestone and minimized the use of stone dust (limited drainage), which I replaced largely with 3/8" crushed stone.

The driveway consists of two areas of different cobblestones: The lower part is steeper and to insure stability and durability it has been paved with cobblestones in the segmental arc pattern.

 

 

  The upper area was paved with 'jumbo cobblestone' (10"x7"x4"), which is a faster process. The photo on the left shows the installation of the 'cubes' and the granite curbstone that separates the two driveway sections. The jumbo cobblestones are placed in a running bond pattern.

 

  To check the permeability, I had an water hose run for 1 hour over the stronger sloping part of the driveway. No water ever run off, instead it disappeared immediately among the cobblestones like through a sieve.

The drainage also works in the winter when during warmer day times ice is melting, but instead of accumulating on the surface and freezing again in then night, it drains away between the pavers and the result is an ice-free driveway.

     
 

An older installation of a cobblestone walkway, here including a step and two formal granite posts which are positioned in the line of a clipped boxwood hedge. (Sorry for the low quality of the images)

 

     
  The width of the segmental arcs depends on the width of the area to be paved. As visible in the photo on the left, the arcs have to end in a way that they are cut off in a 90-degree angle. To achieve this, one has to calculate the number and width of the arcs (see 'Segmental Arcs').
     
     

 

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