9.1.15 External works
External works, including drives and paths, shall have appropriate finishes.
Drives and paths should be:
- within a maximum ±10mm deviation measured using a 2m straight edge with equal offsets; however, localised falls into gulleys and channels are acceptable
- designed and constructed to minimise the potential for standing water.
One hour after rain has stopped, areas of temporary standing water should not be deeper than 5mm or exceed 1m². Temporary standing water is not permitted adjacent to entrance doors.
Also note:
- displacement and variations in surface levels, including scuffing and pitting, may arise due to settlement, natural ground movement and traffic
- when checking flatness, the slope required for drainage on drives should be taken into account.
Drainage covers should:
- align with the adjacent ground or surface finish (for channels, the cover should be set below the adjacent ground)
- be positioned so that the difference in height between the cover and adjacent hard surfaces allows for future settlement.
Last updated: 2nd January 2024