Building & renovation
How much microcement do you need per m²?
How many kg and packs of microcement for your floor or wall — from m², consumption per m² and pack size.
Quick answer
Microcement is sold by weight, not litres — total powder use for base + colour coats is typically 2.5–4 kg/m² on prepared substrates. We default to 3 kg/m² with 10% waste. Worked example: bathroom floor 12 m² → 12 × 3 × 1.1 = 39.6 kg → 8 × 5 kg packs (or 2 × 25 kg if your supplier only sells large buckets).
Advanced settings
Material needed
82.5 kg
- Packs to buy
- 17 × 5 kg
Microcement systems are applied in thin layers (base + colour coat + sealer sold separately). Total powder consumption is typically 2.5–4 kg/m² for walls and floors — we default to 3 kg/m² for a two-coat build. Absorbent substrates and rounded edges increase use; edit kg/m² to match your brand TDS.
How it works
Most trade systems are polymer-modified cementitious coatings in two or three components (base, colour coat, optional top). Ready-mix pastes exist for DIY patches; full wet-area floors usually need a matched multi-coat kit. Finished thickness is thin: about 2–3 mm on floors, often 1–2 mm on walls. Wet rooms (bathrooms, showers) need a continuous waterproof membrane under the build and a sealer rated for standing water. Outdoors, only UV-stable outdoor systems — plus fall for drainage and a UV-rated sealer — or the surface chalks and cracks.
Labour often costs more than the powder. Rough EU ranges for skilled application (prep excluded): €40–90/m² indoors depending on city and detail; complex bathrooms and outdoor decks sit higher. Material for a 12 m² bathroom is often a few hundred euros in kits; the quote you get will swing with substrate repair. Always compare local quotes — prices go stale fast. Sealant and primer are separate SKUs — this tool sizes powder only. Curved coves and absorbent screeds push kg/m² up; edit the field to match your TDS. Substrate prep often needs a floor grinder buy or rent — diamond pads are the recurring buy.
Where it goes wrong most often: in a bathroom the system fails if the continuous waterproof membrane underneath is missing — water tracks through the joints and the coating powders away from below, and you see it in the second winter, not the first. Cracks come from the substrate instead: this is 2–3 mm of rigid layer with no margin, so over young screeds or floors that flex it has to be decoupled, not simply applied on top. Grey streaks on the finished job mean a steel trowel instead of stainless — in raking light they never come out. It needs a stable temperature for days: below 10 °C curing slows and the colour shifts, so a cold site is the wrong site. Buy all the powder from one batch, because the shade moves between production runs and on a continuous surface it shows. Then the sealer in traffic areas is redone every 3–5 years: if you wait until the wear is visible, you have already worn through the colour underneath.
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Frequently asked questions
How many kg of microcement per m²?+
Most brands quote 2.5–4 kg/m² for the full build (not including sealer). Floors with rounded coves and multiple colour layers trend toward the upper end. Always confirm on the TDS for your exact system.
What thickness for bathrooms vs outdoors?+
Floors typically finish around 2–3 mm total; walls thinner. Bathrooms need a waterproof underlayment and wet-rated sealer more than extra millimetres. Outdoors requires an outdoor-rated system and UV sealer — do not use indoor kits on a terrace.
How much does microcement labour cost?+
Labour varies widely by country and finish detail — treat €40–90/m² indoors as a rough EU ballpark for skilled work, excluding heavy substrate repair. Get at least two local quotes; online averages go stale within months.
Do I need a primer under microcement?+
Yes on most substrates — primer bonds the base coat and controls suction. Primer litres are not in this kg calculator; budget separately or use the bonding-primer paint tool for rough litre estimates on walls.
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