Polished Concrete Floors: Finishes, Costs, Pros and Cons for Modern Homes

Polished concrete floors are concrete slabs that are mechanically ground and polished, or ground and sealed, to create a smooth, hard-wearing floor finish. In Melbourne, What's The Damage puts the typical cost at about $115 per m² to polish an existing slab and about $220 per m² for a new slab poured and mechanically polished (verified October 2026). In a new home, the best results come from planning the floor before the slab is poured.

This guide covers what polished concrete is, its pros and cons, the main finishes, aggregate and colour choices, planning in a new build, where to use it, care and what it costs.

What Are Polished Concrete Floors?

Polished concrete is a concrete floor that has been ground with progressively finer abrasives to expose and refine the surface, then polished or sealed.

Boral describes polished concrete as "a refined decorative finish created by mechanically grinding and polishing a concrete surface". The grinding removes the top layer of the slab, which can reveal the sand and stone (aggregate) inside the concrete. The floor is then densified and polished to a sheen, or coated with a sealer.

There are two starting points:

• A new slab: the concrete mix, colour, aggregate and finish are chosen before the pour, so the result can be planned.

• An existing slab: an older slab is uncovered (often after removing carpet, tiles or timber) and ground back. The look depends on what is already in the concrete, so it is less predictable.

Polished Concrete Pros and Cons

Polished concrete floors are durable, easy to clean and work well with in-slab heating, but they are hard underfoot, can feel cold without heating and can be slippery when wet.

On warmth, Policrete describes polished concrete as a thermal mass material that holds heat and can feel warm in winter, especially with hydronic heating. Boral notes it "works exceptionally well with underfloor heating systems". Without heating or winter sun reaching the floor, it will feel cool underfoot, so rugs and heating are worth planning for living areas and bedrooms.

On the downsides, a hard floor reflects sound, so rooms with high ceilings and few soft furnishings can feel echoey. Policrete also warns that particularly smooth polished concrete can be slippery when wet, which is why the finish should change in wet and outdoor areas.

Polished Concrete Finishes Explained

The four main finishes are grind and seal, honed, burnished and mechanically polished, and each suits different rooms.

• Grind and seal concrete: Boral explains that it involves "surface grinding followed by the application of topical sealers". It is faster and cheaper, but the sealer wears more readily than a mechanically polished surface.

• Honed concrete: a matte finish with more grip. Geostone describes honed concrete as suited to outdoor entertaining areas, pools and wet areas such as bathrooms.

• Burnished concrete: a smooth surface with minimal aggregate showing and a subtle sheen, for a clean, crisp look.

• Mechanically polished concrete: the surface itself is ground and polished to a satin or high-gloss finish, rather than relying on a coating. Honed and polished concrete are often combined in one home, with polished floors inside and honed floors in wet and outdoor areas.

Choose the Aggregate Exposure and Colour

How much stone shows in the floor (aggregate exposure) and the colour of the concrete are decided before the slab is poured.

Boral describes three common levels of exposure:

• Full exposure: a high-gloss finish with the aggregate fully exposed, giving a speckled, stone-like floor.

• Partial exposure: a satin finish with some aggregate showing.

• Minimal exposure (burnished): a smooth surface with little or no stone showing.

Geostone sums up the choice: full exposure suits a raw, natural look, and nil exposure suits a clean, crisp finish.

For polished concrete floor colours, oxides can be added to the concrete mix so the colour runs through the whole slab, as Boral does with its Colori range. The stone in the mix also changes the look when it is exposed. Because both are part of the concrete itself, they cannot be changed after the pour. Choosing them alongside the home's other interior finishes, joinery and benchtops keeps the palette consistent, which is part of ROMAAC's interior design and finishing work.

Planning Polished Concrete in a New Build

In a new home, polished concrete floors start at the slab design, because the mix, colour, aggregate, heating and joints are all set before the pour.

Decide these before the slab is poured:

• Finish and exposure: grind and seal, honed or mechanically polished, and how much aggregate you want to see.

• Mix and colour: the concrete mix, aggregate type and any oxide colour.

• In-slab heating: hydronic pipes or electric heating are laid before the pour. Policrete's install sequence places heating in the ground before the slab is poured.

• Joint layout: joints control where the slab cracks as it dries. The QBCC notes that isolation, control and expansion joints "should be provided to minimise cracking during the drying period". Plan where joints will sit so they line up with walls and doorways.

• Slab design: the slab is engineered for the site and the house, as part of the structural engineering for a custom home.

During the build, the slab needs protecting from trades, equipment and spills, since any damage becomes part of the finished floor. Agree with your builder in writing when the floor will be ground and polished, how it will be protected, and what finish to expect. Concrete is a natural material, so natural variation and fine cracks can appear even in a well-built slab. Discussing this upfront avoids disappointment at handover.

In an existing home, the old floor coverings are removed and the slab is assessed for cracks, patches, glue residue and level changes. Tyrolit notes that cracks are mapped and repaired before polishing, and that damaged slabs add cost. Where the existing slab is in poor condition, a screed or overlay is an alternative. For major works, it is worth weighing renovating against rebuilding.

Where to Use Polished Concrete in the Home

Use a polished finish in dry living areas and a honed finish where floors get wet, and make sure stairs meet the NCC slip resistance ratings.

• Living areas and kitchens: mechanically polished or burnished concrete suits open-plan living. Use rugs and soft furnishings to warm the space and reduce echo.

• Bathrooms and laundries: a polished concrete bathroom floor is possible, but a honed finish gives more grip on wet surfaces, as Geostone recommends.

• Outdoor and alfresco areas: honed concrete is the usual choice outside, and can carry the same concrete look from inside to out, which suits many outdoor living ideas for Melbourne homes.

• Stairs: concrete stairs need slip-resistant treads. The NCC 2022 Housing Provisions, Table 11.2.4 requires stair tread surfaces to achieve P3 or R10 in dry areas and P4 or R11 in wet areas, tested to AS 4586. A slip-resistant nosing strip is the alternative.

Caring for Polished Concrete Floors

Polished concrete needs regular dust mopping, occasional damp cleaning with a pH-neutral cleaner, and resealing every few years for sealed finishes.

Boral recommends:

• Daily: dust mop to remove grit, which acts like sandpaper underfoot.

• Regularly: wet clean with a pH-neutral cleaner.

• Avoid: harsh chemicals and abrasive pads, which can dull or etch the surface.

• Every few years: resealing "may be required" to keep the gloss and protect against wear.

Felt pads under furniture and mats at external doors reduce scratching, and rugs help with comfort and sound.

How Much Do Polished Concrete Floors Cost in Melbourne?

In Melbourne, What's The Damage puts polishing an existing slab at $63 to $180 per m² and a new slab with mechanical polish at $170 to $275 per m².

By finish, Airtasker lists national averages of about $50 per m² for grind and seal, $75 for honed and $100 for a mechanical polish (updated June 2025). It also lists extras: about $25 to $50 per m² to remove existing flooring, about $100 for concrete repairs and about $48 per m² for a screed or overlay.

The main cost drivers are:

• Finish level: a mechanical polish costs more than grind and seal.

• Aggregate exposure: deeper grinding to expose more stone takes more passes.

• Floor area: Tyrolit notes that areas under 100 m² attract higher rates per m².

• Slab condition: cracks, patches and adhesive from old flooring add preparation time.

• Colour and mix: oxides and special aggregates are added to a new slab.

• Edges, steps and stairs: detailed areas take longer than open floor.

Which is cheaper, tiles or polished concrete? There is no reliable like-for-like comparison, because it depends on the tile, the finish level and the slab. On a new build, though, the slab is already part of the house, so a polished finish uses the structure you are paying for rather than adding a second floor material on top.

All of these figures are third-party estimates, not quotes, and not ROMAAC pricing. On a new home, the floor is priced as part of the slab and finishes schedule.

Plan Your Polished Concrete Floors With Your Build

Polished concrete floors look best when the finish, aggregate, colour, heating and joints are designed into the slab from the start. ROMAAC Group plans floor finishes with the structure as part of its custom home construction, architectural design and interior design and finishing work across Melbourne. Contact ROMAAC Group to talk through polished concrete for your home.

FAQs

1. How much do polished concrete floors cost per m² in Melbourne?

What's The Damage (verified October 2026, GST included) puts polishing an existing slab at $63 to $180 per m², typically $115. A new slab poured and mechanically polished is $170 to $275 per m², typically $220. The finish level, aggregate exposure, floor area and slab condition all change the price.

2. Are polished concrete floors cold?

They can feel cool underfoot without heating, but concrete is a thermal mass material that stores heat. With winter sun reaching the floor or in-slab hydronic heating, polished concrete can feel warm in winter. Rugs in living areas and bedrooms also help with comfort and sound.

3. Are polished concrete floors slippery?

Smooth, highly polished concrete can be slippery when wet, so it is best kept to dry indoor areas. Honed concrete has more grip and suits bathrooms, laundries and outdoor areas. Stairs must meet the NCC slip resistance ratings: P3 or R10 for dry treads and P4 or R11 for wet treads.

4. What is the difference between honed and polished concrete?

Both are ground concrete. Honed concrete stops at a matte, textured finish with more grip, suited to outdoor areas, pools and bathrooms. Polished concrete is ground through finer grits to a satin or high-gloss sheen, suited to living areas and kitchens. Many homes use polished inside and honed in wet and outdoor areas.

5. Do polished concrete floors crack?

Concrete can develop fine cracks as it dries, and polishing makes the surface visible rather than covering it. Joints are placed to control where cracking happens, and the QBCC notes they help minimise cracking during drying. Discuss joint layout and what to expect with your builder before the slab is poured.

6. Can you polish an existing concrete slab?

Yes. Once carpet, tiles or timber are removed, the slab is assessed and repaired, then ground and polished or sealed. The look depends on the existing concrete, so colour and aggregate are less predictable than on a new slab. In Melbourne, What's The Damage puts the typical cost at about $115 per m².