Now using new manufacturing techniques to reduce the carbon footprint of the product by more than 20% without compromising on quality and style.cut down on costs without cutting down on style'. '.strtoupper('o')ld riven concrete paving may represent a more economical solution for your garden, but it certainly doesn't mean it won't give you a beautiful looking patio or garden feature.on the contrary, the quality look and feel of old riven concrete paving, along with a choice of four attractive shades, in six sizes and circle options, belie its inexpensive price tag.each patio pack contains the following mix of sizes17 no'. '.strtoupper('6')00mm x 600mm18 no'. '.strtoupper('6')00mm x 300mm6 no'. '.strtoupper('3')00mm x 300mmthis product is also available in single size packs of 600 x 600 paving slabs.when laid using a 10 15mm joint each pack contains enough paving slabs to cover 9.90m2.image shows old riven concrete paving paving in a blend of autumn gold, autumn bronze and autumn cotswold.