Below are some of the uses for the GAP (general all passing) products i.e. 40 mm or 20 mm or 7 mm down to dust.
• A Solid base required? Use Gap40 levelled and compacted.
• Under paving or the final layer before pouring concrete? Use Gap 20 levelled and compacted.
• Trimming off before the pavers go down? Gap 7 levelled and smoothed for the paving to go down