When hiring a glazier in New Zealand, it pays to know what qualifications and credentials to look for. While glazing is not a legally restricted trade in the same way as electrical or plumbing work, there are recognised qualifications, industry standards, and safety obligations that a competent, professional glazier should meet — especially when it comes to safety glazing in critical locations.
The National Certificate in Glazing
The primary trade qualification for glaziers in New Zealand is the New Zealand Certificate in Glazing (previously known as the National Certificate in Glazing). This qualification is delivered through the Building and Construction Industry Training Organisation (BCITO) and covers the skills needed to safely measure, cut, handle, and install glass in residential and commercial settings.
A qualified glazier will typically have completed an apprenticeship of around three to four years, working under a registered training agreement while gaining on-the-job experience. Look for a glazier who holds — or is working towards — this certificate as a sign they have received structured, assessed training.
Safety Glazing and the NZ Building Code
One of the most important areas of glazing knowledge relates to safety glazing. The NZ Building Code requires that glass installed in certain critical locations — such as shower screens, low-level panels, sliding doors, and areas near stairways — must meet specific safety standards to reduce the risk of injury if the glass breaks.
The relevant standard is NZS 4223: Glazing in Buildings, which sets out requirements for glass type, thickness, and installation in different situations. A professional glazier should be familiar with this standard and be able to advise you on which type of glass (toughened, laminated, or wired) is required for your specific application.
If glazing work forms part of a larger building project, a building consent may be required. Always check with your local council before starting work, as consent requirements vary depending on the scope of the job. MBIE Building Performance has useful guidance on when consents are needed.
WorkSafe Obligations and Health & Safety
Glaziers work with heavy, sharp materials and often at height, so health and safety knowledge is essential. Professional glaziers should be familiar with their obligations under the Health and Safety at Work Act 2015, which is overseen by WorkSafe NZ.
This includes:
- Safe manual handling of large glass panels
- Use of appropriate personal protective equipment (PPE)
- Safe working at height (scaffolding, ladders, elevated work platforms)
- Correct disposal of broken or waste glass
A reputable glazier will carry out a site-specific hazard assessment before starting work.
Licensed Building Practitioners (LBP)
For certain types of glazing work that form part of restricted building work — for example, glazing that is integral to the weathertightness or structural integrity of a building — the work may need to be carried out or supervised by a Licensed Building Practitioner (LBP).
LBPs are licensed by MBIE and must demonstrate competence in their area of work. If your glazing project involves new window installation as part of a consent-required build or renovation, ask whether an LBP is involved. Your glazier may hold an LBP licence themselves, or they may work alongside a licensed builder.
What to Ask a Glazier Before Hiring
When getting quotes, it's worth asking prospective glaziers the following:
| Question | Why It Matters |
|---|---|
| Do you hold the NZ Certificate in Glazing? | Confirms formal trade training |
| Are you familiar with NZS 4223? | Ensures safety glazing compliance |
| Are you (or your company) LBP licensed? | Required for some restricted building work |
| Do you carry public liability insurance? | Protects you if something goes wrong |
| Can you provide references or examples of past work? | Gives confidence in quality and experience |
Industry Membership
While not a legal requirement, membership of an industry body such as the Glass Association of New Zealand (GANZ) can be a useful indicator that a glazier is engaged with industry best practice and ongoing professional development. Ask your glazier whether they are affiliated with any trade organisations.
When to Call a Professional
Always use a qualified glazier for:
- Safety-critical glazing in showers, doors, low-level panels, and stairwells
- Structural glazing or curtain wall systems
- Double glazing and IGU (insulated glass unit) installation — incorrect installation can void manufacturer warranties
- Any glazing that forms part of consent-required building work
While a confident DIYer might replace a simple pane of glass in a low-risk location, anything involving safety glazing requirements, height, or structural elements should be left to a professional. You can find qualified local glaziers on tradedirectory.co.nz.
Window & Glass Association
