Every rule your project must meet, found for you.
Search Northern Ireland’s planning and building-control guidance, ask a question in plain English, or generate a project compliance checklist — every answer cited to the source.
Working to a specific project? Generate a compliance checklist →
Answers, with citations
Ask in plain English and get an answer that links to the exact source clause — never an unsourced guess.
Scoped to your council
Overlay a council's local development plan on the Northern Ireland-wide regulations and policy.
Project compliance checklist
Characterise a project and get the requirements that apply, grouped by work area. Try it →
The library
Search the source guidance
4 results · filtered
Depth of pipe cover for drains
3.6NI-wide·Technical Booklet N Drainage
A drain should be laid either at a depth which will protect it from damage or with special protection over it (see paragraph 3.8). The maximum and minimum depths of cover for standard strength rigid p
drainageprotection-from-fallingProtection for rigid pipes with shallow cover
3.8(a)-(b)NI-wide·Technical Booklet N Drainage
Where a rigid pipe of – (a) less than 150 mm diameter has less than 300 mm depth of cover; or (b) 150 mm or more diameter has less than 600 mm depth of cover, it should be surrounded with concrete eit
drainageprotection-from-fallingProtection for flexible pipes with shallow cover
3.8NI-wide·Technical Booklet N Drainage
Where a flexible pipe has less than 300 mm depth of cover under an area other than a vehicular area, it should have concrete paving slabs laid as bridging on granular or other flexible filling at leas
drainageprotection-from-fallingDrain protection under buildings – granular filling
3.9NI-wide·Technical Booklet N Drainage
A drain which runs under a building should be surrounded by at least 100 mm of granular or other flexible filling.
drainagestructuralprotection-from-falling