Hi , My company is Nugget Concrete . We use all of the suppliers as they all have different aggregates , colour mixes etc . Whatever mix the client chooses determines where I order the product . Pedestrian areas are generally poured at 70mm....we will only pour 80mm . All trafficable areas are 100 mm with mesh installed . Steel mesh for concrete and aggregate and galvanised for limestone . All of our projects are cleaned and sealed which is included in the price . Hope that answers your questions Leanne