Shower Base Tiling with Large Format Tiles in Warsaw

Large format tiles on a shower base mean fewer grout lines, a clean look, and the feel of a seamless surface. But working with 60×120 or 80×160 cm tiles on a shower base demands precise cutting, correct fall to the drain, and specialist adhesive. A millimetre off — and water pools instead of flowing to the drain. We install large format tiles on shower bases across Warsaw — from Mokotow to Bielany.

How much does it cost and what affects the price

The cost of large format shower base tiling depends on the base size, cutting complexity, and tile type. Porcelain stoneware 60×120 and sintered stone slabs 80×160 involve different levels of work: the bigger the format, the harder it is to fit around the drain and slopes. If the base has a non-standard shape or recesses — extra cutting time is needed. Adhesive for large format (Mapei Keraflex Maxi, Ceresit CM 17) costs more than standard. Materials are charged separately; labour includes fixings and consumables. Current prices are in the table below.

How the on-site work goes

1. Measuring the base and assessing the substrate. We check the screed with a spirit level — any deviation over 2 mm per metre needs levelling. We verify that the fall to the drain is correct.
2. If the fall is insufficient — we correct it with self-levelling compound or manually using screeding rails. The standard is a 1-1.5% gradient towards the drain.
3. Two coats of primer on the substrate. On a shower base, waterproofing is mandatory: Mapei Mapelastic or Weber.tec 822 membrane, with sealing tape on all corners and wall junctions.
4. Dry-laying the tiles — we work out how the format sits, where the cuts fall, and how to work around the drain. Large format needs planning so that the cut at the drain looks neat.
5. We apply adhesive with a 10-12 mm notched trowel to both the substrate and the tile back (back-buttering is mandatory for tiles from 60 cm). We use flexible adhesive: Mapei Keraflex Maxi or Ceresit CM 17.
6. We lay the tile and set the levelling system (LLS clips). We check the fall to the drain at every stage.
7. After 24 hours — grouting with epoxy grout (Mapei Kerapoxy or Litokol Starlike). On a shower base, standard cement grout does not last — water washes it out within a couple of months. Wall-to-floor junctions get colour-matched silicone sealant.

Common mistakes when tiling a shower base with large format

• Using standard C1 adhesive for large format — the tile comes loose within six months. Tiles from 60 cm need at least C2 rated S1 (flexible).
• Setting the fall by eye without a level or straightedge — water stands in corners and never reaches the drain.
• Skipping waterproofing and relying on the tiles alone — water gets through grout joints and destroys the screed, and the neighbour downstairs gets stains on the ceiling.
• Using regular cement grout instead of epoxy — within 2-3 months the joints darken, crack, and start letting water through.
• Not back-buttering — voids remain under the tile, and it cracks under load.
• Cutting large format with an angle grinder without a guide — chips on the face, uneven cut.
• Forgetting the perimeter expansion joint — when tiles expand with temperature changes they press against the wall and crack.
• Installing a point drain in the centre of a large format tile — you end up making four cuts with slopes. A linear drain against the wall is simpler and more elegant.

What to prepare before the technician arrives

• Make sure the shower base screed is complete and dry (at least 7 days for cement-based).
• The drain must be installed and connected to the waste pipe — tiling is done around it.
• Buy tiles with a 10-15% surplus — large format produces more waste when cutting.
• Check that all tiles are from the same batch — shade can vary between batches.
• Have large format adhesive ready (C2 S1): Mapei Keraflex Maxi, Ceresit CM 17 or equivalent.
• Epoxy grout (Mapei Kerapoxy, Litokol Starlike) — agree the colour in advance.
• Colour-matched silicone sealant — for wall junctions.
• Waterproofing membrane and corner tape — if waterproofing has not been done yet.
• Ensure access to water and electricity — we need a tile cutter and wet cutting.
• Provide access details: intercom code, floor, ability to bring in equipment.
• Clear the bathroom of unnecessary items — the technician needs space for work and cutting.

A real case from Warsaw

A client in the Ursynow district was renovating a bathroom in a new-build — a walk-in shower zone with no tray, just a screed with a fall and a Viega linear drain against the wall. He chose Paradyż 60×120 porcelain stoneware in a concrete finish — minimal grout lines and a modern look. The tricky part was that the drain was off-centre, shifted into the corner — we had to plan the layout so that the cut at the drain was symmetrical. We primed the substrate and applied two coats of Mapei Mapelastic with tape on every corner and wall junction. Adhesive — Mapei Keraflex Maxi, back-buttered with a 12 mm notched trowel. The fall to the drain was set at 1.2% — water clears in seconds, no pooling anywhere. Grout — Mapei Kerapoxy Design in anthracite. Wall junction — Mapei Mapesil AC. The whole job took two days. The client has been using the shower for four months — zero leaks, grout looks brand new.

Frequently asked questions

Who does the work

Shower base tiling with large format tiles is carried out by technicians experienced specifically in working with big formats — it is a separate skill, and not every tiler takes it on. We arrive with an electric tile cutter for wet cutting (we do not use angle grinders on large format — chipping is inevitable), a full levelling system kit, and notched trowels of the right size. We work carefully: falls are checked with a laser level, every joint is inspected. To book a survey, call or message — we reply within an hour.