Part K of the UK Building Regulations sets out requirements for stairs, ramps, and guards. For anyone installing or renovating stairs, understanding Part K is essential.
What Does Part K Cover?
Part K addresses protection from falling, collision, and impact. For stairs, the key requirements include:
Stair Pitch and Going
- Maximum pitch: 42° for private stairs, 33° for buildings other than dwellings
- Minimum going: 220mm (private), 250mm (other buildings)
- Rise between 150-220mm per step
Handrails
- Required on stairs with two or more risers
- Height between 900-1000mm
- Continuous where possible
Visibility of Nosings
- Stair nosings should be made apparent
- Contrasting material or colour recommended
- Especially important for partially sighted users
How Stair Nosings Help Compliance
Quality stair nosings contribute to Part K compliance by:
- Defining the stair edge – Makes each step clearly visible
- Providing contrast – Different colour from stair surface
- Preventing slips – Anti-slip surfaces reduce fall risk
- Protecting edges – Prevents damage that creates trip hazards
Part K and Access
Part K works alongside Part M (access) and BS 8300 (inclusive design) to create safe, accessible buildings. Together, these require:
- Clear distinction of each step
- Consistent rise and going
- Suitable slip resistance
- Visual contrast for those with impaired sight
Get It Right First Time
Non-compliance can mean costly remedial work or, worse, liability in case of accidents. Our stair nosings are designed to meet Part K requirements and come with full technical specifications for building control approval.
Need help specifying compliant nosings? Contact our technical team.