Glass balustrade fixing systems compared

The fixing system determines how toughened-laminated balustrade panels transfer load into the building and how the finished guard looks. Vant Glass offers three mounting options — base channel, standoff spigots and posts — on made-to-measure runs. The glass build is the same; the difference is hardware, substrate preparation and visual weight.

Base channel

Panels sit in a continuous aluminium channel recessed into or bolted along the floor edge. The channel clamp grips the bottom of each pane; the top edge is free (unless a handrail is added).

Advantages

• Cleanest frameless appearance — no visible clamps at the base
• Continuous line along the run; corners handled with dedicated channel bends
• Popular on roof terraces and contemporary balconies

Considerations

• Requires a recess, upstand or dedicated edge detail in the slab or deck
• Channel zone must drain correctly — water must not sit in the rebate
• Installation sequence: channel often fitted before final paving or decking

Best for: design-led terraces and balconies where the floor edge can be formed to receive a channel.

Standoff spigots

Spigots are stainless-steel standoff clamps fixed through the slab or deck, gripping the base of each panel at discrete points — typically two per panel.

Advantages

• Frameless look without a full-length channel recess
• Suits concrete slabs, steel nosing and some composite decks
• Clamps are discreet; glass appears to float above the surface

Considerations

• Pull-out resistance depends on anchor depth and slab thickness — confirm with structure
• Base clamps are visible, though minimal
• Panel alignment requires accurate setting-out of spigot centres

Best for: concrete terraces, renovated slabs and situations where recessing a channel is impractical.

Posts

Posts are vertical stainless or coated steel supports between panels — usually one post shared at each panel joint.

Advantages

• Most economical hardware option
• Wider installation tolerances; familiar to balustrade installers
• Robust in high-traffic or commercial guarding

Considerations

• Posts break the fully frameless sight line
• Wider visual rhythm than channel or spigot systems
• Post centres follow panel widths — typically up to around 1300mm clear glass between posts

Best for: budget-conscious projects, stairs, commercial runs and where robust handrail attachment is needed.

Side-by-side comparison

Channel

Spigots

Posts

Appearance

Most frameless

Near-frameless

Traditional

Substrate

Recess or edge beam

Solid slab/deck

Flexible

Relative cost

Higher

Mid

Lower

Handrail

Optional add-on

Optional add-on

Often combined

Weathering

Needs drained detail

Exposed base fixings

Well understood

Structural and regulatory notes

All three systems must resist the line load and infill loads defined in UK guarding guidance. The glass is toughened-laminated; the fixings and substrate must be designed so panels do not detach under impact or wind suction on exposed terraces.

Coordinate early with your structural engineer on:

• Cantilever slab thickness and reinforcement at the edge
• Anchor type and edge distance for spigots
• Post base plates and bolt centres

Building control may ask for calculations or a manufacturer’s test declaration — use a supplier who provides documented performance data.

Choosing a system

1. Priority is appearance → channel, if the floor edge can be detailed.
2. Solid slab, no recess → spigots.
3. Cost-sensitive or high traffic → posts.
4. Unsure → measure the site, photograph the substrate and discuss with your supplier before forming the slab edge.

Hardware finish — brushed steel, polished chrome or matt black — is independent of mount type. Specify the same finish across balconies, Juliet guarding and any short stair runs for consistency.

Vant Glass manufactures made-to-measure glass balustrades and Juliet balconies in Britain, with free UK mainland delivery. Browse balustrades and guarding or call 03330 902 592 to discuss your run.