Picking the wrong glazier on a commercial build is expensive. The glass is one of the last trades on site and one of the most visible. A glazier who turns up late, supplies the wrong panel, or cannot certify their own work delays a project and undermines the entire program. The right glazier is invisible: they show up when they said, install correctly, and disappear into a clean handover.
This post is for builders, fit-out teams and project managers running commercial jobs in Penrith and Western Sydney. Seven questions to ask before signing the subcontract.
The short answer
Ask about licensing and insurance, project examples and references, lead times and stock, compliance documentation, after-hours availability, warranty terms, and how they handle changes mid-job. A glazier who answers all seven well is worth having on the build. One who hedges on any of them is a risk.
Question 1: What licensing and insurance do you carry?
The basics. A commercial glazier in NSW needs:
- A current NSW glazier’s licence (under the Home Building Act for residential work over $5,000) or equivalent commercial trade qualifications.
- Public liability insurance, minimum $20 million for most commercial sites.
- Workers compensation for all employees.
- Vehicle insurance for the work vehicles.
Ask for certificates of currency. Any reputable glazier will email them on request. We provide ours upfront with every quote.
If the glazier hedges on this question, walk away.
Question 2: Can you show me three recent jobs like mine?
A glazier who has done thirty fit-outs in the last year will have stories, photos and references. One who is new to commercial work will not.
Ask:
- “Show me three jobs of similar scope in the last 12 months.”
- “Can I call the project manager or builder from one of them?”
- “What was the most challenging part of those jobs and how did you handle it?”
The answers tell you whether the glazier understands commercial work or is talking themselves into it.
For our commercial window service, we have done jobs across Penrith, Kingswood, Glenmore Park, St Marys, Cranebrook and the surrounding suburbs over the past 35 years. References are available on request.
Question 3: What are your lead times for the glass I need?
Glass lead times are not flexible. The toughening oven runs on a fixed schedule and custom panels take time. A glazier who understates lead times either does not know their suppliers or is hoping for the best.
Ask:
- “What is the lead time on standard 6mm toughened from order to delivery?”
- “What about 10.38 laminated, low-iron, or IGUs?”
- “What is your typical delay from quote to install?”
- “Who is your toughening supplier?”
Realistic answers for Western Sydney commercial work in 2026:
- Standard toughened: 5 to 8 working days.
- Laminated: 7 to 12 working days.
- Low-iron, frosted, oversized: 10 to 15 working days.
- IGUs: 15 to 20 working days.
Anyone promising next-day on custom toughened glass is either underestimating or planning to substitute.
Question 4: What compliance documentation do you provide?
Every commercial install should come with a documentation pack:
- Certificate of installation.
- Manufacturer compliance certificate (AS/NZS 2208).
- Glass schedule per panel.
- AS 1288 calculations for structural panels.
- Energy ratings on IGUs.
- WHS documents and SWMS for site.
- Public liability insurance certificate.
Ask to see a sample pack from a recent job. If the glazier looks blank, the documentation does not exist. The certifier will pick this up at the end of the build and the cost falls on the principal contractor.
Question 5: Do you do after-hours work?
For most commercial fit-outs, some of the install needs to happen outside business hours. Retail tenants need to trade. Hospitals run 24/7. Offices need certain trades done outside core hours.
Ask:
- “Do you have a crew available for after-hours work?”
- “What is your minimum notice for an overnight install?”
- “Do you charge an uplift for after hours and weekends?”
A glazier with a real commercial business says yes to all of this. A glazier focused on domestic work usually does not.
Question 6: What is your warranty and how do you handle issues?
Ask about the warranty terms in writing:
- Glass: typically 10 years against defects.
- Installation workmanship: typically 5 years.
- IGU seals: typically 10 years against failure.
- Hardware (hinges, latches): typically 1 to 5 years depending on manufacturer.
More importantly, ask:
- “If I have a warranty issue, how do I report it and what is your response time?”
- “Can you give me an example of a warranty issue you have handled recently?”
- “Are you the warranty provider or do I deal with the manufacturer directly?”
A reputable glazier owns their warranty. A bad one points at the manufacturer.
Question 7: How do you handle changes mid-job?
Changes happen on every fit-out. The tenant wants frosted instead of clear. The architect adjusts a door swing. The PM moves a wall.
Ask:
- “What is your process when a change comes in?”
- “How do you cost a variation?”
- “Will you proceed without written approval?”
- “What is your lead time impact on a typical mid-job change?”
The right answer:
- “We document the change, cost it in writing, send it for approval, and we do not proceed until we have written sign-off. Lead time impact depends on the change but we tell you upfront.”
A glazier who proceeds on a phone call risks the program. A glazier who refuses to engage with changes is unrealistic. The middle path is what you want.
Bonus question: who is the contact and how do they respond?
Most builds get bogged down in communication. The glazier you want has:
- One named contact for your project.
- Responsive to email and phone within a working day.
- Comfortable on site walk-throughs.
- Honest about timelines and capacity.
- Available out of hours for emergencies.
If the salesperson is the friendliest and most responsive, but the install crew is different and slower, the experience changes mid-job. Ask who you will actually be working with.
Red flags that should stop you
A few things that should end the conversation:
- No certificate of insurance. Non-negotiable.
- No referenced past work. Risk.
- No compliance documentation samples. Risk.
- No physical workshop or vehicles. Often a one-person shop with limited capacity.
- Quotes that are much lower than competitors. Either understating the work or planning to cut corners.
- No willingness to visit the site. Quotes without measure are quotes that change later.
- Pushy sales approach. Discounting the answer to a question to close the deal.
Trust your gut. A glazier you do not trust on day one will not become a glazier you trust on day fifty.
Working with us
For builders working in Western Sydney, our typical engagement is:
- A site walk-through to understand the scope.
- A written quote within 5 working days, broken into glass, hardware, install and compliance.
- Glass schedule reviewed before order.
- Single point of contact during the build.
- Compliance documentation delivered at handover.
- Warranty terms in writing.
We work with builders, fit-out teams and shopfitters across Penrith, St Marys, Kingswood, Cranebrook, Glenmore Park and the broader Western Sydney area. Domestic jobs through our splashback repair team, commercial through the commercial windows team.
When to call us
Bring us in when:
- A new tender includes glass scope.
- A project is being scoped and you want a realistic lead time estimate.
- An existing glazier has missed milestones or compliance.
- You want a second opinion on a glass schedule.
Phone 02 4722 2787 or send the drawings through our contact form.
FAQ
What if I have already engaged a glazier and they are causing issues? Talk to them first. If the situation is not resolving, get a second opinion. We have stepped in mid-job before.
Do you work as a sub to a builder or direct to the property owner? Both. Either contracting structure is fine for us.
Can you do a quick fit-out without all the formality? Yes for small jobs. We scale the documentation to the size of the work.
Do you offer terms? For commercial accounts with a credit application, yes. Standard 30-day terms apply once approved.
The right glazier is one you can rely on for the next project, not just this one. The seven questions take ten minutes to ask. Worth it.
