Understanding AS 1288 — Australian Glass Standard
AS 1288 is the Australian Standard that governs the selection and installation of glass in buildings. Compliance is mandatory for all building work in Australia and is regularly referenced by building certifiers and inspectors. Getting it wrong can mean failed inspections, costly re-work, insurance complications, and most importantly, danger to building occupants.
What AS 1288 Covers
The standard specifies which type and thickness of glass must be used based on multiple variables: the location of the glass in the building, the risk of human impact, wind loading requirements, proximity to wet areas, balconies, and overhead locations. It is not a single lookup table — it's a comprehensive framework that addresses several variables simultaneously, and applying it correctly requires understanding how those variables interact.
Human Impact Safety Zones
Grade A safety glass — toughened or laminated — is required wherever a person could fall into or through the glass. The critical locations specified in AS 1288 include: • Doors and sidelights (glass panels within 300mm of a door edge) • Any glazing with its bottom edge less than 1000mm from the finished floor level • Shower screens, bath screens, and bathroom enclosures • Glass balustrades and pool fencing • Overhead glazing in any walkable area • Stairwell and landing glazing
The underlying principle is that glass in these locations must not create large, sharp shards if broken by impact. Both toughened and laminated glass qualify as Grade A safety glass, but they behave very differently after breakage — toughened shatters into small fragments, while laminated holds together. The right choice depends on the application; see the dedicated article on toughened vs laminated glass for a detailed comparison.
Wind Loading Requirements
AS 1288 also addresses structural adequacy. Glass must be thick enough to resist wind pressure without breaking or deflecting excessively. The calculation draws on several factors: • Wind region — Australia is divided into regions A through D, plus cyclonic zones • Building height and terrain category (urban, suburban, open) • Panel dimensions (width and height) • Glass type and thickness
Most glaziers use manufacturer-provided span tables or software to confirm compliance rather than doing the calculation manually. If you're working in a high-wind or cyclonic region, or with large panels, always verify against the tables. Guessing or using rule-of-thumb thickness is not acceptable practice and creates real liability if the glass fails.
Marking Requirements
All safety glass installed in a building must bear a permanent identification mark. This mark must show the manufacturer, the type (T for toughened, L for laminated), and the relevant standard number. The mark is typically etched or sandblasted into a corner of the glass. When ordering safety glass, confirm with your supplier that it will arrive correctly marked — unmarked safety glass cannot be certified as compliant during a building inspection and may need to be replaced at your cost.
When Annealed Glass Is Still Permitted
Not all glass positions require safety glass. Standard annealed (float) glass is still appropriate for windows that are: • More than 1000mm above floor level • More than 300mm from a door edge • Not in a human impact hazard location • Not overhead, not in a wet area, and not in a balustrade or fence
The key skill is correctly classifying each panel's location before specifying the glass. When in doubt, defaulting to safety glass is never wrong — it's only ever wrong to use standard glass where safety glass is required.
Common Compliance Failures
The most frequent AS 1288 non-compliance issues found during building inspections are: • Unmarked safety glass — the toughening or lamination is correct but the required permanent marking is absent • Standard annealed glass in shower screens and bathroom enclosures • Sidelights adjacent to doors glazed with standard rather than safety glass • Balustrade glass that doesn't meet the required minimum thickness for the height and loading • Insufficient glass thickness in high-wind or cyclonic regions
Each of these failures can require complete glass replacement at the glazier's cost if discovered during inspection. Getting the specification right the first time is always cheaper.
Compliance in Renovations and Repairs
AS 1288 applies to any glazing work done as part of a building renovation or addition. Straight like-for-like replacements (the same glass type and size in an existing frame) are treated differently from new work, but if the scope of work changes the glass type, size, or configuration, the new installation must comply fully.
When to Seek Guidance
If you're unsure about a specific application, the most practical resource is your glass supplier — they deal with AS 1288 specification questions daily and can usually confirm requirements for your situation quickly. For complex or unusual applications (heritage buildings, large commercial facades, structural glass), consult a structural engineer or glazing consultant. The cost of a professional opinion is trivial compared to the cost of failed inspections or, worse, a glass injury claim.
Frequently Asked Questions
Does AS 1288 apply to rental properties?
Yes. AS 1288 applies to all building work in Australia regardless of tenure. If you're replacing glass in a rental property as part of maintenance or renovation, the replacement glass must comply.
What's the difference between toughened and laminated for safety purposes?
Both qualify as Grade A safety glass under AS 1288. Toughened glass is 4–5x stronger and shatters into small blunt fragments. Laminated glass holds together after breakage due to its plastic interlayer. For overhead glazing, laminated is required because fragments must not fall — toughened glass that fully disintegrates overhead is a hazard even though the fragments are small.
Is AS 1288 the same as the NCC (National Construction Code)?
No. The NCC specifies performance outcomes for building work; AS 1288 is the referenced standard that tells you how to achieve them for glass selection and installation. Compliance with AS 1288 demonstrates NCC compliance for glazing.
Can I use toughened glass everywhere to simplify compliance?
Yes — toughened glass everywhere meets AS 1288 in all locations where glass is required in a building. Many glaziers take this approach for straightforward jobs. The trade-off is higher cost and longer lead times compared to annealed glass in non-critical locations.
What about heritage buildings where modern safety glass can't be used?
AS 1288 does contain provisions for heritage situations where using modern safety glass would destroy heritage values. These cases require specific documentation and assessment. Consult a building certifier before proceeding with any heritage glazing job.