Choosing a balustrade: glass, aluminium and what installers wish you knew
Materials, compliance rules and installer red flags for anyone adding or replacing a balustrade on a deck, balcony or stairs.
A balustrade is one of the few home improvements that's equal parts style decision and safety device. It frames the view from your deck, and it's also the thing standing between a wobbly guest and a metre-plus drop — which is why it's one of the more regulated bits of work you can do on a house.
That mix means the choice of installer matters as much as the choice of glass or aluminium. Here's how the job works and what to check before you sign.
What a balustrade installer does
Balustrade installers measure, fabricate and fix the barrier system around decks, balconies, stairs and voids. On a typical job that means setting posts or spigots, fixing into timber, concrete or tile, fitting panels or infill, and installing the handrail. Most specialise in a system — powder-coated aluminium, semi-frameless glass with posts, or frameless glass on channel or spigots.
It overlaps with other trades at the edges: a carpenter or decking builder often installs simple timber or aluminium balustrades as part of a bigger job, while glass systems and anything needing core-drilling into concrete is usually the specialist's territory. If the deck itself needs structural work first, that's a carpenter or builder before the balustrade crew arrives.
How the price takes shape
Balustrades are priced per linear metre installed, and material sets the band: aluminium at the budget end, semi-frameless glass in the middle, and frameless glass with polished stainless hardware at the top — the spread from cheapest to dearest per metre is roughly threefold. A short aluminium balcony run might land around the low thousands all-in, while a full frameless perimeter can reach five figures.
Beyond material, the location does the damage: stairs and raked sections need custom-cut panels, and core-drilling into concrete or fixing through tiles and waterproofing is much slower than bolting to timber. Treat all of this as indicative — the live figures on this page and a couple of real quotes will pin down your job.
Picking an installer who'll get it certified
Balustrade work is building work, so licensing depends on your state and the job's value — but compliance rules apply everywhere: any barrier protecting a fall of a metre or more must meet the height and gap requirements in the Building Code, and exposed or coastal sites may need thicker glass with an engineered wind rating.
Good installers talk about compliance before you ask. They'll confirm the barrier height, explain how gap and climbability rules affect your design, and say plainly whether engineering or certification for glass panels is included in the quote — because some quotes quietly leave it out. An installer who shrugs at the word compliance is the wrong installer.
Mistakes to avoid
Most balustrade regrets come from choosing on looks alone and finding out later the barrier doesn't comply, or the quote didn't cover what you assumed it did.
- Accepting a quote that doesn't state who certifies compliance with the Building Code
- Assuming glass engineering and certification are included — ask, because some quotes exclude them
- Paying frameless prices when semi-frameless gives most of the look for meaningfully less
- Ignoring the fixing surface — core-drilled concrete and tiled edges cost more than timber, and quotes should say so
- Letting a non-compliant barrier pass at handover; fixing it later means redoing the job
Indicative range only, not a quote — see the full guide for worked scenarios and what moves the price.
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