Why choosing the right floor sander matters
Timber floor sanding looks simple from the outside, but it’s a specialised job that can go wrong quickly. A poor sanding job can leave swirl marks, uneven edges, drum marks, patchy stain, dust everywhere, or a finish that flakes off within months. In the New Zealand market, where many homes have older native timber floors, moisture changes, uneven subfloors, and tight renovation timelines can make workmanship even more important.
A reliable floor sander will explain the process clearly, inspect the timber properly, and give you a realistic programme for the work. A dodgy one often does the opposite: vague answers, rushed decisions, and a lot of talk about “special deals” or “today only” pricing.
The good news is that many unreliable operators give themselves away early. If you know what to look for, you can avoid costly mistakes and protect your home.
Red flag 1: They only want cash, or push for cash without explanation
Cash-only trading is not automatically illegal, but it is a major warning sign when a tradesperson insists on it or pressures you to avoid an invoice. For homeowners, the problem is simple: if something goes wrong, you want a paper trail.
Be cautious if the person:
- says they can do it cheaper if you pay cash - refuses to provide a tax invoice or GST invoice - asks you to pay a large amount before any work starts, especially in cash - avoids discussing how payment will be recorded
A professional floor sander should be able to accept normal payment methods and provide a written record. For larger jobs, it’s reasonable to pay stage-by-stage as the work progresses, but you should still get the terms in writing.
If someone is trying to keep the job off the books, ask yourself why.
Red flag 2: No written quote, or only a vague text message
A proper written quote is one of the most important protections you have. It should set out what is included, what is excluded, the price, GST, timing, and any conditions.
A dodgy operator may offer only:
- a verbal estimate - a short text with a number and nothing else - a “rough ballpark” that changes later - a quote that doesn’t specify sanding stages, coatings, or repairs
That creates room for disputes over what was actually agreed. For example, does the price include filling gaps? Edge sanding? Moving furniture? Repairs to damaged boards? Floor coatings? Clean-up? If it’s not written down, you may end up paying more than expected.
For floor sanding, the quote should clearly state whether it covers:
- inspection and moisture checks, if relevant - coarse, fine, and finish sanding stages - edge sanding and corners - sanding of stairs or adjoining areas - gap filling or timber repairs - supply and application of sealer, stain, or topcoat - dust control or extraction method - disposal of waste - GST
If the quote is too vague, ask for a revised written version before you agree to anything.
Red flag 3: They demand a big upfront deposit
A reasonable deposit is common for securing a booking, especially during busy periods. But a large upfront payment — particularly before you’ve seen any materials or work — is risky.
Watch out for:
- requests for 50% or more upfront for a standard residential sanding job - pressure to pay immediately to “lock in” the price - claims that materials are “specially ordered” when they are standard products - refusal to explain when the balance is due
In New Zealand, many homeowners schedule sanding around renovation timing, tenancy changeovers, or seasonal conditions. Summer is busy for flooring work because warm, dry conditions help coatings cure, while winter can mean slower drying and more scheduling pressure. Dodgy operators may use that urgency to push for a deposit before you’ve had time to compare quotes.
A safer approach is to agree on a modest deposit, a clear start date, and payment milestones in writing.
Red flag 4: No physical address, no website, or hard-to-trace contact details
A legitimate business should be easy to identify and contact. If you can only reach someone through a mobile number and a social media page, that is a warning sign — especially for a job involving access to your home.
Be wary if they:
- won’t give a business name - have no physical address or service area details - avoid email communication - use a different name on each platform - won’t provide a landline, website, or invoice details
You do not need a fancy office, but you should be able to confirm who you’re dealing with. Check whether they are registered on the Companies Register if they claim to be a company, and look for a proper invoice with an address and NZBN if applicable.
A traceable business is usually more accountable if issues arise.
Red flag 5: Pressure tactics and “sign now” behaviour
Reliable tradespeople are often busy, but they should not bully you into a decision. High-pressure tactics are a classic sign of a dodgy operator.
Common pressure tactics include:
- “This offer is only good today.” - “If you don’t book now, I’ll have to charge more.” - “Other customers are waiting, so I need a deposit immediately.” - “There’s no need to get other quotes.” - “You don’t need a written quote; just trust me.”
That kind of language is designed to stop you comparing options. In a market where good sanders can be booked out ahead of summer, some pressure is understandable. But genuine professionals will still give you time to review the quote and ask questions.
If someone rushes you, slow the process down. A reputable floor sander will respect that.
Red flag 6: They cannot explain the sanding process clearly
A floor sanding job should come with a clear plan. If the person can’t explain what machines they’ll use, how many sanding passes are needed, or how they’ll handle dust and finish curing, that is a concern.
A good operator should be able to explain:
- the type and condition of your timber floors - whether boards need repairs before sanding - how much floor movement or cupping is acceptable - the sanding sequence they’ll use - the type of finish, stain, or sealer recommended - drying times and when the room can be used again
If they brush off your questions or give only vague assurances like “we’ll sort it”, that’s not enough. You’re hiring someone to work on a major visible surface in your home — they should know their trade and be able to explain it in plain language.
Red flag 7: No examples of past work, reviews, or references
It’s normal to ask for proof of previous work. A trustworthy floor sander should be able to show before-and-after photos, recent references, or reviews from real customers.
Warning signs include:
- no photos at all, or only stock images - reviews that look copied, generic, or all posted at once - refusal to provide local references - claims that they’re “too busy” to show recent work
Ask for examples of jobs similar to yours — for example, old rimu floors, character villas, or open-plan living areas with lots of natural light, where sanding imperfections will be obvious. Good results on one type of timber do not always mean the same operator is suitable for every floor.
Red flag 8: They skip site inspection or quote without seeing the floor
A floor sanding quote based only on a couple of photos can be unreliable. Timber floors vary hugely in condition, moisture, previous coatings, nail heads, damage, and edge access.
Be suspicious if they:
- quote over the phone without asking detailed questions - won’t inspect the rooms first - ignore signs of water damage, squeaks, or previous patching - fail to mention how they’ll deal with transitions to other rooms
A proper inspection helps them spot problems early, including loose boards, stains, gaps, or existing coatings that may affect the finish. If they can’t be bothered to look properly, they may be underquoting — and you could pay later through variations or poor results.
What a trustworthy quote should include
Use this table as a quick check when comparing floor sanding quotes.
| Item | What to look for | Why it matters | |---|---|---| | Scope of work | Exact rooms/areas, stairs, repairs, finishing | Avoids disputes about what’s included | | Price | Total price in NZD, including GST | Lets you compare quotes properly | | Materials | Brand/type of sealer, stain, or topcoat | Affects durability and appearance | | Prep work | Furniture moving, nails, gap filling, repairs | Prevents extra charges later | | Dust control | Equipment and clean-up method | Important for health and convenience | | Timing | Start date, estimated duration, drying time | Helps you plan around the work | | Payment terms | Deposit, progress payments, final payment | Reduces financial risk | | Warranty or workmanship | Any guarantee, and for how long | Clarifies what happens if there’s a problem |
If the quote is missing several of these items, ask for a revised version.
Check the trade credentials that matter in New Zealand
Floor sanding itself is not a licensed trade in the way plumbing, gasfitting, drainlaying, or most electrical work is. However, that does not mean you should skip checks.
Before hiring, you should:
- confirm the business name and NZBN details, if applicable - ask whether they are insured, including public liability cover - check whether they have experience with your type of flooring - ask if any related work might need another specialist - get consent advice if the project involves wider building work
For example, if floor sanding is part of a bigger renovation involving structural changes, alterations to load-bearing elements, or significant building work, you may need building consent from your local council. If the job uncovers electrical issues, that work must be handled by a suitably authorised electrician. Don’t let a floor sander say they can “just fix” unrelated regulated work themselves unless they are properly licensed to do so.
Practical steps to protect yourself before you hire
The safest approach is simple and sensible:
- Get at least three written quotes from different floor sanders. - Compare the full scope, not just the price. - Ask who will actually do the work — the owner, employees, or subcontractors. - Check whether the quote includes GST. - Ask for expected start and finish dates. - Confirm what happens if hidden damage is found once sanding starts. - Never pay a large amount upfront without a written agreement. - Keep all messages, invoices, and photos.
It also helps to prepare your home properly before the job starts. Move furniture, remove curtains or fragile items, and ask how much dust you should expect. In smaller NZ homes, especially older ones, dust containment and airflow planning matter more than many homeowners realise.
What to do if something feels off
If a tradie’s behaviour sets off your alarm bells, trust that instinct. You do not have to explain yourself or continue the conversation.
A good response is to say:
- “Please send me a written quote and payment schedule.” - “I’d like time to compare a few options.” - “I’m not comfortable paying a large deposit upfront.” - “Can you provide your business details and references?”
If they get defensive, rude, or push harder, that confirms the concern. Walk away and keep looking.
If you have already paid and something goes wrong, keep all evidence and seek advice quickly. Depending on the situation, your options may include contacting the company, using dispute resolution services, or seeking guidance from Consumer Protection or the Disputes Tribunal.
Bottom line
Hiring a floor sander should feel organised, not stressful. Cash-only demands, no written quote, large upfront deposits, no address, and pressure tactics are all warning signs that deserve attention. The best protection is to slow down, ask clear questions, and compare multiple written quotes from tradespeople who are easy to identify and happy to explain their process.
A properly run floor sanding job can lift the whole home. A rushed, poorly documented one can be expensive to fix. Choose carefully, and insist on professionalism from the start.