Custom-sized glass orders in New Zealand generally take anywhere from 3 business days to 4 weeks, depending on the type of glass, the complexity of the job, and your supplier's current workload. Planning ahead is key — especially for large renovation projects or if you need specialist glazing products.
What Affects Lead Times?
Several factors influence how long you'll wait for custom glass:
- Glass type — Standard clear float glass is usually cut and ready within a few business days. Specialist products like laminated safety glass, double-glazed units (IGUs), toughened (tempered) glass, or low-emissivity (low-e) glass take longer.
- Size and shape — Unusually large panes or non-rectangular cuts require more processing time.
- Local vs. imported glass — Some high-performance or decorative glass products are imported and may take several weeks to arrive in NZ.
- Supplier workload — Busy periods (such as summer building season) can stretch lead times.
- Location — Glaziers in main centres like Auckland, Wellington, and Christchurch typically have faster access to stock than those in rural areas.
Typical Lead Times by Glass Type
| Glass Type | Typical Lead Time |
|---|---|
| Standard clear float glass | 2–5 business days |
| Toughened (tempered) safety glass | 5–10 business days |
| Laminated safety glass | 5–10 business days |
| Double-glazed units (IGUs) | 1–3 weeks |
| Acoustic or specialist glass | 2–4 weeks |
| Imported decorative or patterned glass | 3–6 weeks or more |
These are general guides only — always confirm lead times directly with your glazier or supplier, as they vary.
Safety Glass and the NZ Building Code
It's worth knowing that the NZ Building Code (specifically Clause F4 – Safety from Falling (note: check current Building Code clause references with MBIE, as clause numbering may vary) and Clause F2 – Hazardous Building Materials) requires safety glass in certain locations — including shower screens, low-level glazing, doors, and sidelights. Toughened or laminated glass meeting NZS 4223 is typically required in these situations.
Because safety glass must be toughened before cutting (you can't cut it afterwards), your glazier needs accurate measurements upfront. Any errors mean starting the order again, adding days or weeks to your timeline. For compliance questions, check with MBIE Building Performance or your local council.
Double Glazing and Insulated Glass Units
Double-glazed units (IGUs) are among the most common custom glass orders in NZ homes, particularly as homeowners upgrade older single-glazed windows for warmth and energy efficiency. IGUs are made to order and typically take 1–3 weeks. If you're retrofitting double glazing, your glazier will measure on-site before ordering — so factor in the measurement visit when planning your timeline.
For guidance on the energy and comfort benefits of double glazing, Energywise has useful information for NZ homeowners.
Tips to Avoid Delays
- Book your glazier early — especially before summer or if you're on a building project timeline.
- Get accurate measurements first — your glazier should measure on-site rather than relying on your own measurements for critical or large panes.
- Confirm the glass specification upfront — know whether you need toughened, laminated, or double-glazed glass before ordering, as changing your mind mid-order resets the clock.
- Ask about stock availability — some glaziers hold common sizes in stock, which can cut lead times significantly.
- Allow buffer time — if your project has a hard deadline (e.g., a Healthy Homes compliance date for a rental property), order well in advance. See Tenancy Services for Healthy Homes glazing requirements.
What About Emergency or Urgent Glass Replacement?
If a window is broken and your home is exposed to the weather or a security risk, many glaziers offer emergency boarding or temporary glazing while your custom replacement is being made. Standard clear glass for common window sizes is often available from stock for same-day or next-day replacement. Always ask your glazier what they can do in the short term.
Do You Need a Building Consent?
Replacing glass in an existing frame (like-for-like) is generally a Schedule 1 exemption under the Building Act and doesn't require a building consent. However, if you're changing the frame, altering the opening size, or installing new glazing as part of a larger project, consent may be required. Always confirm with your local council — requirements can vary. MBIE Building Performance has a helpful guide to building consent exemptions.
When to Call a Professional
Glazing work — particularly the installation of large panes, safety glass, or double-glazed units — should always be carried out by a qualified glazier. Incorrect installation can compromise weathertightness, structural integrity, and safety. While glazing is not legally restricted work in the same way as electrical or plumbing, poor installation can create real hazards and may void product warranties.
For rental properties, landlords must also ensure glazing meets Healthy Homes Standards, which may require professional assessment.
You can find qualified local glaziers on tradedirectory.co.nz to get accurate quotes and lead time estimates for your specific job.
Window & Glass Association
