A glass balustrade kit looks like the obvious shortcut: order panels, posts or a base channel online, fix them yourself and save on design and fitting. For some spaces that works well. For others, a kit becomes the most expensive part of a project, because it doesn't fit the floor, the stair or the Building Regulations. This guide sets out what a kit actually includes, where it performs, where bespoke glass earns its cost, and the questions to ask before you buy either.
What a glass balustrade kit includes
Most kits sold in the UK follow one of three formats, each built around standard panel sizes:
- Post and clamp kits. Stainless or anodised posts at regular centres, with glass panels held between them by clamps. Panels are usually toughened glass in a small range of widths, and the kit is cut to length on site by adjusting the gaps.
- Spigot kits. Each panel stands on two round or square spigots bolted or core-drilled into the deck. They look lighter than posts, but every spigot must be fixed into a structure that can take the load.
- Base channel kits. A continuous aluminium channel holds the glass along its bottom edge, giving the cleanest "frameless" look. Channels need a solid substrate and precise levels, and the glass is usually thicker and laminated.
A kit normally supplies glass, posts or spigots, fixings, end caps and sometimes a handrail. It rarely includes a site survey, a structural check of what it is being fixed to, or any design for awkward ends, corners and rakes.
Where a kit works well
A kit is a sensible choice when the run is straight, the floor is level, and the structure is simple to fix into. Typical examples are a straight garden decking edge, a low terrace step or a simple landing between two walls. In these cases standard panel widths can be spaced to fit, and small differences in gap are hardly noticed.
A kit can also suit a confident DIY installer who is happy to check fixings, follow the manufacturer's instructions to the letter and accept a slightly more visible system of posts and clamps.
Where bespoke glass earns its cost
The difference shows up wherever the space stops being simple. Bespoke glass is cut to the exact measurements taken on site, so the design follows the building rather than the other way round.
Stairs and raked runs
On a staircase, each panel follows the pitch of the stair. Standard rectangular panels leave stepped gaps at the bottom edge, and the 100mm gap rule for homes where young children may be present is easy to break. Bespoke raked panels are cut to the angle of the stair, so the bottom edge runs parallel to the nosings and the gaps stay consistent.
Corners, returns and out-of-square walls
Very few walls, landings or voids are perfectly square. Kits deal with this by leaving larger gaps or adding extra posts. A bespoke design measures each run separately, sets out the joints and corners, and specifies the panel sizes so the glass meets cleanly.
Frameless and full-height glass
If the aim is a frameless balustrade with no posts at all, the glass becomes the structure. Its thickness, interlayer and fixing all have to be designed for the load and the height, and that is a specification job, not a catalogue choice.
Balconies and Juliet balconies
External guarding carries higher loads and must meet a taller minimum height. A Juliet balcony also has to be fixed into the reveal or face of the building, often through cladding or render. Both are judged on the fixing as much as the glass.
Safety and Building Regulations: kit or bespoke, the rules are the same
Whichever route you choose, a balustrade is a protective barrier and is covered by the Building Regulations. In England the guidance is Approved Document K: Protection from falling, collision and impact, supported by the British Standard BS 6180 for barriers in and about buildings. In summary:
- Height. Inside a single-family home, guarding to stairs, landings and the edges of internal floors should be at least 900mm high. External balconies and roof edges need at least 1100mm.
- Openings. Where children under five may be present, the guarding should not let a 100mm sphere pass through any opening, and it should not be easy to climb.
- Loads. Barriers must resist a horizontal load at handrail height. As a guide from BS 6180, this is commonly 0.36 kN per metre inside a single dwelling and 0.74 kN per metre for balconies and roof edges. Commercial and public spaces need more.
- Glass type. The barrier must still protect if a pane breaks. With monolithic toughened glass that usually means a continuous handrail linking the panels. Without a handrail, the glass is normally laminated glass made from toughened layers, so it stays in place if one layer fails.
These figures are a summary to help you compare options, not a design. Your building control body or a structural engineer confirms what your project needs.
The practical point is that a kit is only compliant when it is installed into a structure that can take its load, at the right height, with the right gaps. The glass in the box can be excellent, and the balustrade still fail an inspection because the deck, joist or stair stringer behind it was never checked.
Kit or bespoke: a side-by-side comparison
| Question | Glass balustrade kit | Bespoke glass balustrade |
|---|---|---|
| Fit | Standard panel sizes, gaps adjusted on site | Each panel cut to site measurements |
| Stairs and rakes | Limited; stepped gaps are common | Raked panels follow the stair pitch |
| Look | Posts, clamps or spigots usually visible | Posts, spigots, channel or fully frameless, chosen for the space |
| Structural check | Left to the buyer | Part of the survey and specification |
| Installation | DIY or a general builder | Specialist glazing installation |
| Best for | Straight, level, simple runs | Stairs, voids, balconies, frameless and feature spaces |
The hidden costs of getting a kit wrong
A kit's price is clear at checkout, but some costs only appear later:
- Re-ordering. Toughened glass cannot be cut or drilled after it is made. If a panel is the wrong size, it has to be replaced.
- Fixings that don't suit the substrate. Timber decks, steel stairs and concrete slabs each need different anchors. A kit's standard bolts may not be right for yours.
- Building control. If the guarding fails an inspection, the work is reopened. On a staircase or balcony that can delay a whole project.
- Finish. In a living space or an architect-designed home, visible clamps and uneven gaps change how the space feels every day.
How a bespoke balustrade project runs
- Photos and drawings. Send us photos and any plans so we can discuss the options and give you a guide price.
- Survey. We measure every run, check the structure you will be fixing into and confirm heights and gaps against the regulations.
- Specification. We agree the system, glass make-up, fixing method, handrail if needed, and finishes for posts, spigots or channel.
- Manufacture. The glass is toughened or laminated to the exact sizes, with edges polished.
- Installation. The balustrade is fitted, levelled and checked, ready for sign-off.
You can see the range of glass balustrade systems we work with, and more examples of glass balustrades for homes and commercial spaces.
Questions to ask before you buy
- Is the run straight and level, or does it follow a stair, corner or void?
- What will the glass be fixed into, and has anyone checked it can take the load?
- Is the barrier inside the home or outside, and what height does that require?
- Will young children use the space, and will every gap stay under 100mm?
- Does the design rely on a handrail, or should the glass be laminated?
- Who will sign the work off with building control?
Frequently asked questions
Are glass balustrade kits safe?
A good kit can be safe when it suits the space and is installed correctly into a sound structure, at the right height and with the right gaps. The risk usually comes from the installation and the substrate, not the glass itself.
Can I install a glass balustrade kit myself?
On a simple, straight, level run, a capable DIY installer can fit a kit. Stairs, balconies and anything relying on the glass alone for strength should be designed and fitted by a specialist, and the work may need building control approval.
Do I need a handrail on a glass balustrade?
Not always. If one panel of monolithic toughened glass breaks, the barrier must still protect, so a continuous handrail is usually needed. Laminated glass made from toughened layers can often be used without a top rail, subject to the system and design load.
How high does a glass balustrade need to be?
In a single-family home, at least 900mm for internal stairs and landings, and at least 1100mm for external balconies and roof edges. Commercial and public buildings can need more.
Is bespoke always more expensive than a kit?
The glass and design cost more, but a bespoke balustrade avoids re-ordering, wasted panels and failed inspections. On stairs, voids and balconies the overall cost is often closer than it first appears.
Talk to us about your balustrade
If you're weighing up a kit against bespoke glass, send us a few photos and rough measurements. We'll tell you honestly whether a standard system will do the job, and if bespoke is the better route, we'll give you a photo-based guide price and arrange a survey. Contact CreoGlass to get started.
