PART K · Falling collision and impact
Part K building regulations explained
Part K helps protect people from falling, collision and impact. It covers matters including stairs, ramps, guarding, barriers, glazing and the safe operation of relevant windows and doors. These requirements affect everyday use as well as obvious hazards at height.
Why does Part K matter in a house project
A loft conversion introduces a staircase. An extension may include low glazing or a change in floor level. A balcony needs suitable guarding. Each creates a different risk that the design should address.
Approved Document K brings together guidance on these matters. Older references to Approved Document N for glazing should not be assumed to describe the current England structure; relevant glazing guidance is now within Part K.
Is a handrail the same as guarding
A handrail assists movement. Guarding helps prevent a fall at an edge or opening. Some assemblies provide both functions, but the design must establish the relevant protection.
Ask for details showing heights, openings, fixings and the supporting structure. A visually substantial balustrade can still have unsuitable connections.
What about glass
Glass in relevant locations needs suitable protection against injury from impact. Other provisions concern visibility, opening and cleaning where applicable.
For example, a transparent screen beside a busy route raises a different issue from a small window away from normal contact.
What should be checked before ordering
Confirm the final finished floor levels and the intended building use. Stair geometry, thresholds and guarding details should be based on the completed building, not unfinished structural dimensions alone.
Coordinate Part K with Part M accessibility and Part B fire safety. A staircase can satisfy a geometrical detail yet remain unsuitable as part of an escape route.
Obtain an agreed design before fabrication. Correcting a bespoke stair or glass balustrade after installation can be expensive and disruptive.