The decision in front of you is not really about two materials. It is whether your bathroom surface is a grid broken by seams or one continuous skin. Everything that follows — how the room looks after eight winters, how long the cleaning takes, what happens when one corner fails, how much your installer matters — comes out of that one difference. Framed that way, the question stops being about taste and becomes about what you are willing to maintain and what you are willing to risk.
The misunderstanding that has to go first
Microcement is a finish. It is not waterproofing. This is misunderstood so often that it deserves the bluntest possible sentence: a microcement bathroom in Finland still needs a certified vedeneristys (the waterproofing membrane) underneath it, exactly as a tiled bathroom does. The membrane is a separate layer, installed and inspected before any decorative coating goes on. The sealer on top of microcement is a wear and stain layer, not a märkätila (wet room) waterproofing system, and no honest supplier claims otherwise.
The rules are therefore identical for both. The membrane must be applied by someone holding the Finnish personal certification for wet-room waterproofing, and photographed and documented before it is covered. Floor gradients must fall properly to the lattiakaivo (floor drain) — a detail a flat-looking continuous surface hides more easily than a tile grid does. The guidance the trade works from is published by rakennustieto.fi, and a contractor who cannot say which instruction cards they follow has told you something useful.
Because the membrane rules are the same either way, the real comparison starts above it — and the practical way to learn what a firm installs and stands behind is to read its own list of systems. In Turku that list sits under a Finnish menu label, Kylpyhuoneremontti Turku, and what matters is which surface systems are named there and which of them carry a written warranty, rather than a gallery of finished rooms with no system names attached. If a coating is not on the list, the firm does not do it routinely, whatever a salesperson says.
Seams, and what they actually cost you
Count them once and the argument becomes concrete. A 5 m² floor in 300 × 300 mm tiles carries roughly 33 running metres of grout. Drop to 100 mm mosaic — still popular on shower floors because it takes the fall to the drain neatly — and you are near 100 metres. Walls add their own. Every metre is a softer, more porous line that collects soap residue and, in a poorly ventilated room, grows the black speckling no amount of scrubbing fully reverses.
Microcement removes nearly all of that. A well-executed floor has no seams except at movement joints and around the drain, and the wall-to-floor junction can be coved instead of siliconed. In a 1970s block in Varissuo or Runosmäki with extract ventilation that was never balanced, that is not cosmetic — it decides whether the grout needs renewing after a decade. The flip side: silicone seams still exist at fittings and glass, and still need replacing every five to ten years whichever surface you chose.
How each one ages
Tile does not change. Ceramic and porcelain are effectively inert: the tile you see in year fifteen is the tile that was delivered. What ages is the grout, which discolours, and the silicone, which does not last. Microcement ages the other way round — the surface itself develops a patina. Traffic lines appear where people step out of the shower, the sealer dulls unevenly, and the colour shifts slightly under UV in a room with a window. Some read that as character, some as wear — genuinely preference rather than quality. Sealer is refreshed every few years to keep it performing.
When something goes wrong
This is where tile wins outright and the difference should not be softened. A cracked tile is lifted, the bed cleaned, a replacement bedded and grouted — an afternoon, assuming you kept spares. Microcement cannot be patched invisibly. It is hand-applied in thin layers, and its mottling records how one person’s trowel moved on one day; a repair reads as a repair. Real fixes mean recoating a whole plane, wall or floor, junction to junction. Budget for that possibility.
Thickness, movement and the substrate underneath
Microcement is thin: typically 2–3 mm, against the 10–20 mm tile plus adhesive adds. In a small flat where the door threshold, the drain height and the existing floor level all have to reconcile, that saved height is a real advantage — especially when coating over a sound existing structure rather than demolishing to the slab.
Substrate movement is the other half. Over the concrete slabs of a Turku block, both behave well. Over a timber-framed floor in a wooden house in Portsa or Raunistula, or a detached house on Hirvensalo, the deck deflects, and a rigid continuous skin telegraphs that as a hairline crack far more readily than a tile field with flexible joints does. Finnish suppliers write this comparison up themselves, and the page titled mikrosementti vai laatta is worth reading for the substrate preparation it describes, because that preparation determines the outcome.
The installer matters more than the material
Tile is forgiving: a mediocre tiler produces a mediocre but functional floor. Microcement is not forgiving at all: trowel work, timing between coats, room temperature and humidity during application, and the sealing sequence are skills that take years, and Finland has far more competent tilers than competent microcement applicators. Ask how many wet rooms this team has coated, ask to see one five years old rather than five weeks old, and get the coating warranty in writing separately from the waterproofing warranty.
Cost, honestly
Neither option is reliably cheaper. A full renovation of a standard 4–6 m² flat bathroom runs roughly 8 000–15 000 €, or about 600–1 500 €/m² depending on scope and finish, with materials at 30–60 % of the total and labour the rest. Microcement saves demolition and tiling time but costs more per square metre in material and skilled application; tile is cheaper per square metre but slower to lay. Microcement genuinely saves money only when a sound existing substrate can be coated rather than stripped — which requires the membrane below to be modern, certified and documented, and in pre-1999 stock it usually is not.
So which one
Choose tile if the floor structure moves, if you want a surface repairable in pieces for the next thirty years, if the budget is tight, or if you cannot verify your installer’s microcement track record. Choose microcement if seam-free cleaning is what you actually care about, if floor height is constrained, if you want a calm continuous look, and if you have found an applicator whose older work you have seen yourself. Both are compliant. Only one forgives a poor day’s work.
