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UKUK Building Regulations
References & Sources
Standards Cited
- BS 594987 — Asphalt for roads and other paved areas — Specification for transport, laying, compaction and type testing protocols
Defines asphalt densities, laying depths, and specification for driveways and road surfaces - DMRB CD 226 — Highways England Design Manual for Roads and Bridges — Pavement design
Design guidance for pavement layer thicknesses and material specifications for roads View →
Formulas Used
- Tarmac volume:
volumeM3 = length x width x (depth / 1000)
Source: Basic geometry - Tonnes required:
tonnesRequired = volumeM3 x density / 1000
Source: BS 594987 — Densities: standard 2400, porous 2000, heavy-duty 2500 kg/m3 - Coverage per tonne:
coverageM2 = (tonnes x 1000 / density) / (depthMm / 1000)
Source: BS 594987
Key Assumptions
- Asphalt densities: standard 2400 kg/m3, porous/permeable 2000 kg/m3, heavy-duty 2500 kg/m3 — BS 594987
- Recommended depths: pathways 25-40mm, driveways (light) 50mm, driveways (heavy) 60-75mm, roads 75-100mm+ — DMRB CD 226 / BS 594987
- Typical wastage allowance of 5-10% — Industry standard practice