Why guarantees matter when hiring a welder
Welding work can be structural, safety-critical and expensive to fix if it fails. Whether you are getting a gate repaired, a trailer modified, stainless fabrication done, or steelwork installed on a deck or pergola, a clear guarantee helps you understand who is responsible if something goes wrong.
A good welder should not just promise a “quality job”. They should be able to explain:
- what workmanship guarantee they provide - whether any materials or components carry a separate manufacturer’s warranty - how long the cover lasts - what is excluded - how to make a claim if there is a problem
In New Zealand, those promises sit alongside your rights under the Consumer Guarantees Act 1993 (CGA). Even if a tradie gives only a short written guarantee, the CGA may still apply to the service.
The three types of protection you should ask about
When you compare quotes, it helps to separate the different layers of cover. They are often mixed together in advertising, but they are not the same thing.
| Protection type | What it covers | Who provides it | Typical examples | |---|---|---|---| | Workmanship guarantee | Faults caused by the welder’s labour or installation | The welder or their business | Poor weld penetration, misaligned gates, sloppy finishing, leaking or weak joins | | Product warranty | Faults in the materials, fittings or manufactured items supplied | The manufacturer or supplier | Pre-made hinges, locks, powder-coated components, metal roofing accessories | | Consumer Guarantees Act rights | Services and goods that are not of acceptable quality, not fit for purpose, or not provided with reasonable care and skill | The law | A weld that fails because the job was not done properly, or materials that are not fit for the agreed use |
You want all three to be clear before work starts.
What a workmanship guarantee should cover
A workmanship guarantee is the welder’s promise about the quality of their labour. For small jobs it may be 12 months; for larger structural or fabrication work it may be longer. The exact length matters less than whether it is written down and understandable.
A sensible workmanship guarantee should specify:
- the date it starts, usually the completion date - how long it lasts - what defects are covered - whether the welder will repair, replace or rework faulty areas - whether travel, access or call-out charges apply - whether the guarantee is transferable if you sell the property
Examples of workmanship issues that should usually be covered include:
- welds cracking due to poor technique - a gate sagging because the frame was not squared and braced correctly - steelwork installed out of alignment - corrosion caused by poor preparation, such as inadequate cleaning before welding or finishing - stainless work that discolours, pits or fails due to inappropriate consumables or contamination
A workmanship guarantee should not be vague. If the quote or invoice says only “12-month guarantee”, ask what that actually means in practice.
What product warranties may apply
If the welder supplies materials, fixings, prefabricated metal parts, hardware or coatings, those items may have their own warranty. That warranty usually belongs to the manufacturer or importer, not the installer.
This matters because a failed part may not be the welder’s fault. For example:
- a bought-in lockset may fail independently of the gate fabrication - galvanised or powder-coated components may have a manufacturer warranty for finish defects - imported steel products may carry a supplier warranty, but only if installed and maintained according to the supplier’s instructions
Before you accept a quote, ask:
- Which items are being supplied by you? - Which items are covered by a manufacturer warranty? - Will you pass on the warranty documents and batch details? - Are there any maintenance requirements to keep the warranty valid?
Keep the invoices, packaging labels and any product data sheets. If a supplier or welder goes into liquidation later, those records may be important.
How the Consumer Guarantees Act applies to welding work
The Consumer Guarantees Act 1993 gives you automatic rights when you buy services for personal, domestic or household use in New Zealand. A welder cannot contract out of these rights for standard household jobs.
For welding and fabrication, the CGA generally requires the service to be:
- carried out with reasonable care and skill - fit for the purpose you told the welder about - completed within a reasonable time, if no time is agreed - completed for a reasonable price, if no price is agreed
If the job is not acceptable, you may be entitled to have it fixed. If the failure is serious, you may be able to cancel the service and seek a refund or damages, depending on the circumstances.
The CGA is especially important where the job is safety-related or part of a larger project, such as:
- balustrade repairs - structural supports - stair components - trailer modifications - retaining or outdoor steel elements exposed to weather
If the welder’s work is part of a building project, there may also be obligations under the Building Act 2004. Some fabrication or installation work may need to comply with building consent conditions, council requirements, or an engineer’s design. Welding itself is not automatically a consented trade, but the project around it might be.
Questions to ask before you accept a quote
Ask these questions before work begins. A reputable welder should answer them clearly and put the important parts in writing.
- What workmanship guarantee do you offer? - How long does it last? - What is excluded? - Do you supply any materials or products with separate warranties? - Will I receive copies of product warranty documents? - If there is a defect, do you repair it, replace it, or refund it? - Is the guarantee still valid if the work is outdoors or exposed to salt air? - Does the guarantee depend on maintenance, painting, or cleaning? - Do you hold any relevant trade qualifications, and are you insured? - If the work forms part of a building project, who is responsible for consent or engineering sign-off?
It is also sensible to get multiple written quotes. In New Zealand, prices can vary a lot depending on whether the job is a quick on-site repair, a bespoke fabrication, or a more complex structural job requiring design, transport and install. A quote that looks cheap may not include removal, repainting, surface prep or a proper guarantee.
What a fair guarantee looks like in practice
A fair guarantee is clear, realistic and matched to the type of work. For simple repair work on an indoor item, a shorter guarantee may be reasonable. For outdoor steel exposed to rain, frost and coastal conditions, the welder should explain how finish, maintenance and environment affect durability.
A good guarantee will usually be:
- in writing, on the quote, invoice or separate terms - easy to understand - specific about the covered work - reasonable for the size and type of job - not full of broad exclusions that remove all responsibility
Be cautious if a welder:
- refuses to give anything in writing - says “no refunds, no claims, no exceptions” - uses a guarantee that sounds longer than industry norms but excludes almost everything - will only warranty work if you use their preferred maintenance service without explaining the cost
For outdoor welding in places like coastal Northland, the Bay of Plenty or Canterbury’s windy, frost-prone areas, ask how the work will cope with the local environment. Corrosion resistance is often more important than the weld itself.
Common exclusions and maintenance conditions
Some exclusions are normal. A guarantee is not the same as a promise against every possible problem.
Common exclusions may include:
- damage caused by impact, vehicle strike or misuse - corrosion caused by lack of maintenance, blocked drainage or standing water - modifications made by another contractor after the job is complete - movement caused by ground settlement or building movement - cosmetic changes that do not affect function - wear and tear on hinges, latches, rollers or other moving parts
If maintenance is required, the welder should tell you exactly what to do. For example, they may require:
- regular cleaning in coastal areas - repainting scratched coatings promptly - lubrication of moving parts - inspection after heavy weather or frost
If the workmanship guarantee depends on maintenance, make sure the schedule is realistic and written down.
What to do if the weld fails or the work is faulty
If something goes wrong, act promptly and keep records. The sooner you raise the issue, the easier it is to prove what happened.
Step 1: Document the fault
Take clear photos and video, including close-ups and wider shots showing context. Note dates, any recent weather events, and when the fault first appeared.
Step 2: Contact the welder in writing
Email is best because it creates a paper trail. Explain:
- what the problem is - when you noticed it - why you think it is related to the welding or installation - what outcome you want, such as repair, replacement or a refund
Step 3: Give the welder a reasonable opportunity to fix it
Under the CGA, the business should generally be allowed to remedy a failure if that is appropriate and feasible. For safety-critical or urgent issues, tell them that the problem needs prompt attention.
Step 4: Escalate if they do not resolve it
If the welder refuses to help, or the fix fails again, you may have further options.
These can include:
- seeking advice from Citizens Advice Bureau or Community Law - using Disputes Tribunal for smaller claims, up to the Tribunal limit - making a claim through the District Court for larger or more complex disputes - contacting your home insurer, if the issue has caused insured damage - if relevant, raising concerns with the local council or a structural engineer where building safety is involved
If the work affected a building consent or engineering requirement, keep the council paperwork and any producer statements or sign-off documents. Those records matter if the repair is part of a broader compliance issue.
Special issues for structural or regulated work
Not all welding jobs are equal. Some are straightforward fabrications, while others sit inside a wider regulated project.
Be extra careful where the welding relates to:
- structural steel - load-bearing supports - balustrades and handrails - trailers or vehicle modifications that must comply with NZTA rules - work on systems that also involve plumbing, gasfitting, drainlaying or electrical connections
Plumbing, gasfitting and drainlaying are restricted under the Plumbers, Gasfitters and Drainlayers Act and must be done by authorised people. Electrical work is regulated by the Electrical Workers Registration Board and must be done by appropriately authorised electricians or electrical workers. If a welding job crosses into those trades, make sure the right person is engaged for the right part of the work.
For building work, ask whether a building consent is needed before you start. Many homeowners assume a tradie will handle this, but responsibility often sits with the owner unless the agreement clearly says otherwise.
How to protect yourself before the job starts
The best warranty is one you never need to use because expectations were clear from the start.
Before you hire a welder:
- get at least two or three written quotes - check references or recent similar work - ask for proof of insurance - confirm who is supplying materials - make sure the guarantee is written into the quote or terms - keep copies of emails, drawings, measurements and change orders - confirm any consent, engineering or compliance requirements before work begins
For larger jobs, ask for staged invoices linked to progress. Avoid paying everything upfront unless the job is very small and the business is well established with a strong written agreement.
A good welder will not be offended by these questions. In fact, a professional should welcome them.
Final takeaway
A welder’s guarantee should give you confidence, not confusion. Look for a clear workmanship warranty, separate product warranty details where relevant, and an understanding of your CGA rights. If the work is faulty, document the problem, contact the business promptly and escalate if needed.
For New Zealand homeowners, the safest approach is simple: compare written quotes, check credentials, and make sure the guarantee matches the real-world risks of the job, especially where weather, corrosion or building compliance are involved.