Marble polishing is a mechanical, skill-dependent process, and a poor job can leave a floor looking worse or unevenly finished. Here's what's worth checking before you commit to a contractor.
With so many options advertising marble polishing, here's what actually separates a good contractor from a risky one.
Ask how long the company has specifically worked with natural stone, not just floor cleaning in general — polishing marble is a different skill from general floor care, and experience with the specific challenges of stone (etching, lippage, colour matching for repairs) matters. Photos or examples of past work, ideally with before-and-after shots of jobs similar in scale to yours, are a reasonable way to gauge this.
A contractor confident in their work should be willing to stand behind it — ask what happens if the finish isn't even or issues appear shortly after completion. Good aftercare advice (recommended cleaning products, resealing intervals) is also a sign of a contractor thinking about your floor's long-term condition rather than just the one-off job.
If a quote seems unusually low compared to others, ask specifically what's excluded — that's usually where the difference lives.
Online reviews are useful but worth reading critically — look specifically for reviews mentioning marble or stone work rather than general floor cleaning, since a contractor with strong reviews for carpet or upholstery cleaning isn't necessarily experienced with stone polishing specifically. Photos attached to reviews, where available, are often more informative than the star rating alone.
It's generally a good idea, particularly for larger jobs, since it gives you a sense of the typical price range and helps you spot a quote that seems unusually high or low relative to others assessing the same floor.
Ask whether the machines and pads are specifically designed for stone floors, as opposed to general-purpose buffing equipment, since the correct diamond abrasive system is what actually delivers a proper polish rather than a temporary shine.
A written quote is worth insisting on, since it gives both parties a clear reference for what's included, the agreed price, and the scope of work, which reduces the chance of disputes once the job is underway.
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