Why guarantees matter when hiring a roof painter
A roof paint job is exposed to some of New Zealand’s harshest conditions: strong UV, wind-driven rain, coastal salt, and big temperature swings. If preparation is poor or the wrong coating system is used, problems can show up quickly as peeling, chalking, blistering, rust bleed, or leaks around flashings and fixings.
That is why it is not enough to compare quotes on price alone. A roof painter should be willing to explain what they will guarantee, for how long, and what is covered. In New Zealand, a decent guarantee is not just a sales tool — it is a sign the contractor understands the job and is prepared to stand behind it.
For homeowners, the key is to separate three different things:
- **Workmanship guarantees** from the roof painter - **Product warranties** from the paint or coating manufacturer - **Consumer rights** under the Consumer Guarantees Act 1993 (CGA)
These are related, but they are not the same.
What a workmanship guarantee should cover
A workmanship guarantee is the roof painter’s own promise about the quality of their labour. It usually covers faults caused by incorrect preparation, application, or installation practices.
A solid workmanship guarantee should be in writing and should clearly state:
- how long it lasts - what defects are covered - what the contractor will do if there is a problem - any exclusions or conditions
Typical workmanship issues that a guarantee may cover include:
- poor surface preparation before painting - insufficient cleaning or treatment of mould, moss, or rust - coating applied in unsuitable weather conditions - incorrect film thickness or uneven coverage - paint failure caused by application errors - overspray damage to gutters, windows, solar panels, or nearby surfaces - failing to use the agreed primer, sealer, or topcoat system
A trustworthy roof painter should be clear that a workmanship guarantee does **not** cover every possible roof issue. For example, if the roof was already leaking because of aged flashings, cracked sealant, or corrosion beyond repair, repainting alone may not fix it.
What a reasonable workmanship guarantee looks like
In the NZ market, workmanship guarantees are often in the range of 2 to 10 years, depending on the contractor, the roof condition, and the coating system. The longer the guarantee, the more important it is to check the fine print.
A reasonable guarantee should not be vague. It should say things like:
- “We will repair defects caused by our workmanship at no labour cost within the guarantee period.” - “If coating failure is due to incorrect preparation or application, we will rectify it.” - “The guarantee applies to the original property and is transferable if the home is sold, subject to inspection.”
Be cautious if a contractor offers a “lifetime” guarantee with no practical detail. Ask what “lifetime” means, whether it is transferable, and whether it is backed by a company that is likely to still be around in 10 years.
Product warranties: what they are and what they are not
Roof coatings, primers, and sealers may come with a manufacturer’s warranty. This is separate from the roof painter’s workmanship guarantee.
A product warranty usually covers defects in the product itself, such as:
- premature breakdown of the coating due to a manufacturing fault - failure to perform as specified when applied correctly - colour retention or durability issues, if stated by the manufacturer
But product warranties often come with strict conditions. They may only apply if:
- the roof was prepared and coated exactly to the manufacturer’s instructions - the correct primer, undercoat, and topcoat system was used - the product was applied within the specified temperature and humidity range - the roof is maintained properly over time - the installer is an approved applicator, where required
If the roof painter is supplying a product warranty, ask for the actual document rather than a verbal summary. Check:
- the length of the warranty - whether it covers both materials and labour - whether it is backed by the manufacturer or only by the installer - whether it is transferable if you sell the house - what maintenance is required to keep it valid
Product warranty vs workmanship guarantee
| Item | Who backs it? | What it usually covers | Common limitation | |---|---|---|---| | Workmanship guarantee | Roof painter/contractor | Errors in preparation and application | May not cover product defects or pre-existing roof problems | | Product warranty | Manufacturer or supplier | Defects in the coating or materials | Often void if applied outside specification | | CGA rights | Legal right against the trader | Services not provided with reasonable care and skill | Cannot be signed away, but remedies depend on the situation |
The Consumer Guarantees Act: your baseline protection
In New Zealand, the Consumer Guarantees Act 1993 gives homeowners important rights when they hire a tradesperson for domestic work. Roof painting services must be provided with **reasonable care and skill**, **fit for purpose**, and within a **reasonable time** unless otherwise agreed.
That means a roof painter cannot simply say “no warranty, no problem.” Even if their written guarantee is limited, the CGA may still apply.
Under the CGA, the service should:
- be carried out with reasonable care and skill - achieve the result you asked for, where that purpose was made known - use materials and methods suitable for the job - be completed within a reasonable time, unless the contract states otherwise
If the work is faulty, the trader generally must put it right. If the issue is serious and cannot be fixed properly, you may be entitled to a refund or compensation for the damage caused.
Important CGA point for homeowners
You do not have to accept poor workmanship just because the contractor says the job has been “completed.” If the roof paint peels after one wet season because the roof was not properly cleaned or primed, that may be a breach of the CGA as well as the contractor’s own guarantee.
What to ask before you sign a quote
Always get **multiple written quotes** before choosing a roof painter. Quotes should spell out not just the price, but also what protection you get if something goes wrong.
Useful questions include:
- What workmanship guarantee do you offer, and for how long? - Is the guarantee in writing? - Is the product warranty separate from your guarantee? - Which brand and system will you use on my roof? - What preparation is included in the price? - What happens if existing rust, leaks, or damaged flashings are found? - Do you use approved applicators for the product, if required? - What maintenance will I need to do to keep the warranty valid? - Is the guarantee transferable if I sell the house? - What exclusions should I know about?
Also ask for the details of the actual coating system proposed. A roof painter should be able to explain why a particular product suits your roof type, whether it is long-run metal, decramastic tile, concrete tile, or another common NZ roof surface.
Contract details that protect you
A good written contract helps avoid disputes later. It should clearly record:
- the full scope of work - the roofing material and coating system to be used - preparation steps, including washing, moss treatment, rust treatment, sanding, and repair work - how many coats will be applied - colour and sheen level - exclusions, such as gutters, solar panels, or repairs outside painting - start and finish dates - total price, payment schedule, and GST - workmanship guarantee terms - product warranty terms and copies of any manufacturer documents
If a contractor is reluctant to put key details in writing, that is a red flag.
Common exclusions and limits to watch for
Most guarantees and warranties have conditions. That is normal. But the conditions should be fair and clearly explained before work starts.
Common exclusions include:
- pre-existing leaks, rust holes, or structural defects - movement in the roof or building after the job is finished - damage caused by storms, hail, falling branches, or other extreme weather - normal wear and tear - lack of maintenance, such as never washing down salt spray or leaving moss to grow back - damage caused by other trades after the painting job - work carried out on roof areas not included in the quote
Be especially careful if the guarantee depends on “regular maintenance” but does not say what that means. In coastal areas and high-rainfall regions, maintenance expectations may be higher because roofs need periodic cleaning and inspection to stay in good condition.
What to check about the contractor before hiring
Guarantees are only useful if the contractor is properly set up to honour them.
Before you commit, check:
- they have a valid NZ business presence and a written quote - they hold the right insurance, including public liability insurance - they can provide references or photos of similar roof painting work - they explain how they manage health and safety, especially for steep roofs - they are clear about subcontracting, if any part of the job will be done by others
Roof painting itself is generally not a licensed building trade in the way electrical work is regulated by the EWRB or plumbing, gasfitting, and drainlaying by the PGDB. However, the work may still involve building-related issues, and some roof repairs or alterations may require council consent depending on the scope. If the painter identifies broken flashings, rotten substrate, or significant roof damage, you may need a licensed builder or another qualified tradesperson to handle those repairs before painting.
If the work is faulty: what recourse do you have?
If the roof painter’s work fails or is clearly below standard, act quickly and keep records.
Step 1: Document the problem
Take dated photos and note:
- where the fault is - when you first noticed it - whether it is getting worse - any weather events that may have affected it - copies of the quote, invoice, warranty, and product documents
Step 2: Notify the contractor in writing
Send a calm, clear message describing the issue and asking for a remedy. State that you are seeking action under the written guarantee and/or the Consumer Guarantees Act.
Step 3: Give a reasonable opportunity to fix it
In many cases the trader should be allowed to inspect and put things right. If they refuse, delay unreasonably, or do a poor repair, your position becomes stronger.
Step 4: Escalate if needed
If the dispute is not resolved, practical next steps may include:
- using the company’s complaints process - seeking help from your insurer, if the damage is covered - contacting Citizens Advice Bureau for guidance - making a claim through the Disputes Tribunal for smaller disputes, where appropriate - getting legal advice if the loss is significant
The right path depends on the amount involved and the nature of the loss. For many homeowners, the Disputes Tribunal can be a useful and relatively low-cost option for resolving smaller contractor disputes.
Remedies you may seek
Depending on the situation, possible remedies can include:
- the contractor returning to fix the fault at their cost - a partial refund - reimbursement for damage caused by the faulty work - replacement of defective materials, if the issue is product-related
Practical red flags when comparing roof painters
Be cautious if a roof painter:
- gives only a verbal guarantee - refuses to identify the product system in writing - promises a very long warranty but cannot explain exclusions - says maintenance is unnecessary for a coastal or exposed roof - pressures you to pay in full upfront - will not explain what happens if rust or leaks are discovered - says you have no rights once the final invoice is paid
A trustworthy contractor will welcome questions and put the key protections in writing.
The bottom line
When hiring a roof painter in New Zealand, the best protection is a combination of a clear written workmanship guarantee, a genuine product warranty, and your non-negotiable rights under the Consumer Guarantees Act.
Before you choose a contractor, compare written quotes, check what is included, and ask exactly how problems are handled if the coating fails or the finish is faulty. A good roof painter should not just promise a nice-looking finish on day one — they should be willing to stand behind the job for years to come.