Microconcrete is the right choice for most Melbourne renovations. It overlays your existing floors at just 5mm, installs in 4–5 days, and needs no demolition. Polished concrete suits new extensions or builds where a fresh 100mm concrete slab is being poured and long-term thermal mass is a priority. Both deliver a sleek, seamless aesthetic — but they serve very different project types.
Microconcrete and polished concrete are two of the most adopted finishes in new-age renovations in Melbourne. From minimalist bathrooms and contemporary kitchens to large architectural extensions, both materials deliver the seamless, visually appealing aesthetic.
At first glance, they can appear almost identical. But actually, the installation process, structural requirements, durability, finish consistency, and renovation suitability are completely different.
That difference matters more than most homeowners realise.
Polished concrete works with the concrete slab itself, while microconcrete is a highly engineered overlay system applied over existing surfaces. One is most suited to new structural builds. The other offers far greater flexibility for renovations where floor heights, weight, demolition, and project timelines become critical considerations.
Understanding those differences early can help you avoid costly compromises and choose a surface that genuinely suits your Melbourne renovation project. Let's break down the key differences between microconcrete and polished concrete to help you choose the right material for your renovation project.
What actually is Microconcrete?
Microconcrete, often called microcement, is basically a highly versatile, polymer-modified cement coating that we apply entirely by hand. But here is the major difference: instead of pouring a thick slab, we trowel the material in several extremely thin layers. The whole system only builds up to about 2 or 3 millimetres thick.
That tiny profile completely changes the game. Because it sits so thin, we can lay microconcrete straight over stable surfaces you already have in the house. Old floor tiles? Solid timber? Compressed cement boards? Even directly onto bathroom walls. You just skip the massive demolition bill and avoid the dust storm of tearing up your old floors.
Usually, we can wrap up a full installation in about 4 to 5 days. We lock it all in with a tough polyurethane sealer — you can choose a matte, satin, or gloss finish. What you get at the end of the week is a rock-solid, 101% waterproof surface. It handles movement to stop cracking, and you will never have to scrub a dirty grout line again.
What is Polished Concrete?
Polished concrete is exactly what the name suggests. We are talking about the actual structural concrete floor slab, your standard mix of cement, sand, gravel, and water getting mechanically ground down and buffed until it shines.
To actually pull this off, that slab needs to be at least 100mm deep. Crews have to bring in heavy machinery fitted with diamond abrasives just to strip back the top layer. Grinding knocks back the rough patches and exposes the aggregate (those little stones and bits of sand hiding inside the mix). After treating the surface with chemical densifiers to harden it up, the floor gets polished to your chosen gloss level and finally sealed.
Make no mistake, this is a seriously heavy-duty job. The grinders are loud, and the process kicks up a significant amount of dust. And because you are dealing with a massive structural slab, the timeline really drags. You are often looking at a solid 28 days for the concrete to properly cure and harden before you can let other trades safely walk across the floor.
The Key Differences That Matter for Melbourne Renovations
1. Thickness and Floor Height
Microconcrete adds just 5mm to your existing floor level — barely enough to affect door clearances or transitions between rooms. Polished concrete requires a minimum 100mm slab. It is only viable on ground-level pours or new extensions where a fresh slab is being laid. Most Melbourne homes — Federation cottages, Victorian terraces, multi-storey townhouses — are simply not candidates for polished concrete as a renovation finish.
2. Renovation Flexibility vs. New Build Suitability
Microconcrete is purpose-built for renovations. The installation wraps up in 4–5 days, scheduled at the end of a build after joinery and cabinetry are in place. No heavy grinding equipment is needed, and the process produces minimal dust and disruption.
Polished concrete suits new extensions where a fresh slab is already part of the plan. Its high thermal mass stores heat and releases it slowly — a genuine advantage for Melbourne's climate and passive solar design. New builds with a ground-level concrete pour can take full advantage of this without the disruption constraints of an established home.
3. Colour and Finish Control
Microconcrete delivers predictable, dialled-in colour. Homeowners select from a wide range of tones — warm whites, deep charcoals, sandy beiges, or custom shades — and the result closely matches the sample.
Polished concrete produces unique, naturally variable results. The aggregate, pour quality, and slab history all shape the outcome. The variation is part of its character; architects and designers who understand this tend to love it. Those expecting uniformity are often disappointed.
4. Wet Areas and Underfloor Heating
Microconcrete performs exceptionally in bathrooms, showers, and kitchens. Its seamless, grout-free surface leaves nowhere for mould or bacteria to take hold. A correctly sealed microconcrete surface is fully waterproof. Its 5mm profile also transfers heat efficiently from hydronic and electric underfloor heating systems — warmth spreads evenly with no breaks in the surface.
Polished concrete is generally not recommended for underfloor heating. Even sealed, it retains some porosity, requiring closer attention in wet areas.
Side-by-Side Comparison
| Feature | Microconcrete (Microcement) | Polished Concrete |
|---|---|---|
| Thickness | 5mm overlay | Min. 100mm slab required |
| Best For | Renovations, retrofits, wet areas | New builds, large open spaces |
| Substrate Required | Almost any stable surface | Existing or new concrete slab |
| Colour Control | Predictable, wide range | Natural variation, less predictable |
| Installation Time | 4–5 days | Up to 28 days |
| Underfloor Heating | Highly compatible | Not recommended |
| Seamless Finish | Yes — no joints needed | Expansion joints every 4–5m |
| Typical Cost (AU) | $350 per m² | $50–$120 per m² |
| Crack Risk | Very low (flexible polymer system) | Higher — control joints required |
| Wet Areas | Excellent when properly sealed | Requires additional sealing |
Which Should You Choose for Your Melbourne Reno?
Choose microconcrete if:
- Your renovation overlays existing floors without demolition
- Door clearances or floor height transitions are a concern
- Bathrooms, kitchens, or wet areas need a grout-free, waterproof finish
- A fast 4–5 day installation suits your build schedule
- Precise, consistent colour across multiple rooms is a priority
Choose polished concrete if:
- A new ground-floor slab is being poured for an extension or new build
- The authentic, raw aggregate look with natural variation appeals to you
- Thermal mass and passive solar performance are part of your design brief
- The space demands exceptional long-term durability in a large open-plan area
Talk to Melbourne's Preferred Micro Cement Supplier
No 1 Microcement is Australia and New Zealand's architects' preferred micro cement supplier, backed by over three decades of hands-on application experience. Our team are craftsmen — not office staff reading from a script. Every enquiry is handled by someone who has applied these systems in real Melbourne homes.
Send through your suburb, photos, and the areas you'd like coated. We'll give you straight-talking, experienced advice on the right system for your project — and a realistic quote to match.
Call: 0450 743 734
For more information visit us: numberonemicrocement.com.au
