A clear guide to the UK regulations covering stair balustrade height, gaps, glass strength and handrails, plus what changes when you refurbish rather than build new.
The main regulation covering stairs, handrails and balustrades in England and Wales is Approved Document K (Protection from falling, collision and impact). Scotland uses its own Technical Handbook and Northern Ireland uses Technical Booklet H, but the core principles are broadly the same.
For balustrade strength specifically, the relevant British Standard is BS 6180. Glass panels are covered by BS EN 12150. For workplaces and commercial settings, HSE stairs regulations under the Workplace (Health, Safety and Welfare) Regulations 1992 also apply.
Regulation | What it covers |
Approved Document KÂ Â Â Â Â Â Â Â Â Â | Stair design, handrails, guarding, balustrade height |
BS 6180 | Barrier loadings and strength testing |
BS EN 12150 | Toughened safety glass standards |
Workplace Regs 1992 | Commercial and workplace stair safety (HSE) |
The minimum balustrade height in a UK home depends on where the balustrade is fitted. Internal stairs and landings need a minimum height of 900mm, measured from the pitch line of the stairs. For balconies, terraces and any external platform above floor level, the minimum increases to 1100mm. Commercial and public buildings generally follow the 1100mm figure, but always check the design criteria for the building type.
StairFurb internal kits are manufactured to meet the 900mm minimum, and external Alfresco kits are made to the 1100mm minimum.
Handrails on a domestic staircase should sit between 900mm and 1000mm above the pitch line, and between 900mm and 1100mm above floor level on landings. A handrail is legally required on at least one side of any staircase. Stairs wider than 1000mm need a handrail fitted on both sides, and the surface should allow a comfortable, continuous grip along its full length.
StairFurb handrails and baserails are pre-cut and pre-drilled to the correct angle, so the finished height falls within the compliant range when fitted to a standard staircase.
The most important rule for any stair balustrade is that no gap should allow a 100mm diameter sphere to pass through. This applies between spindles, between glass panels, under the handrail and through any open riser on the staircase. The rule exists to stop a small child from becoming trapped or from falling through the balustrade at any point along its length.
StairFurb spindle kits are supplied with spindles cut and spaced to meet this rule when installed to the supplied instructions. Glass panel kits use single full-height panels, which removes the gap question entirely.
Glass used in a stair balustrade must be toughened safety glass manufactured to BS EN 12150, with each pane kite-marked to confirm it. The standard residential specification is 8mm toughened glass with polished edges and radius corners to remove sharp edges.
StairFurb glass panels are 8mm toughened, kite-marked to BS EN 12150, with polished edges and radiused corners. Each panel is cut to size for the customer’s staircase before toughening. Frameless glass systems must use certified fittings rated for the loadings set out in BS 6180.
BS 6180 sets out the loads a balustrade must withstand without failing or flexing beyond the acceptable limit. For a domestic stair or landing, the balustrade needs to resist a uniform horizontal load along the top of the handrail, plus a point load applied at the most demanding position on the rail. Public assembly areas and commercial settings have higher load requirements.
StairFurb kits are designed and tested against the domestic loadings in BS 6180, with fixings specified for typical UK staircase construction.
Replacing the balustrade on an existing staircase is usually treated as a like-for-like repair rather than a new staircase, so the structural elements of Approved Document K (rise, going, pitch, headroom) don’t normally have to be brought up to current standards. The balustrade itself is a different matter. Most Building Control bodies expect a new balustrade to meet current standards for height, gap and strength even when it’s fitted to an older staircase.
In practice, if your existing staircase has a drop of 600mm or more alongside it (which almost all domestic stairs do), the new balustrade should meet the 900mm height rule and the 100mm sphere rule.
Building Regulations approval is not normally required for a straight balustrade replacement. If you’re altering the staircase structure, adding a new opening, or working on a listed building, contact your local Building Control before starting.
In rentals, HMOs, workplaces and public-facing settings, the Workplace (Health, Safety and Welfare) Regulations 1992 apply alongside Approved Document K. HSE guidance on stairways covers handrails, equal rise and going, adequate lighting, contrasting step edges and anti-slip surfaces where needed.
For most commercial settings the 1100mm balustrade height applies, and the higher load figures in BS 6180 may be relevant depending on use. Commercial customers can confirm loading requirements with the StairFurb technical team or apply for atrade account before ordering.
On internal stairs and landings in a home, the minimum is 900mm measured from the pitch line. On external balconies and terraces, the minimum is 1100mm.
No opening in a stair balustrade, including between spindles, glass panels or open risers, should allow a 100mm diameter sphere to pass through. The rule is in place to protect small children.
A straight like-for-like balustrade replacement doesn’t normally need approval, but the new balustrade itself should meet current standards for height, gap and strength. If you’re altering the staircase structure or working on a listed building, check with your local Building Control first.
Yes, provided the glass is toughened safety glass manufactured to BS EN 12150, the panels meet the 900mm minimum height, and the fittings are rated for the loads in BS 6180. StairFurb glass panels meet all three.
Between 900mm and 1000mm above the pitch line on stairs, and between 900mm and 1100mm above floor level on landings.
Yes. External balustrades on balconies, terraces and elevated platforms have a higher minimum height of 1100mm.
Yes, StairFurb kits are used in both residential and commercial settings. Commercial customers should confirm the loading category with the technical team before ordering, as load requirements vary by building use.
All StairFurb glass panels are 8mm toughened safety glass manufactured to BS EN 12150, kite-marked, with polished edges and radiused corners.
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