Essential Tiling Tools: Cutters, Spacers, Levelling Clips & Grout Floats

Summary

Tiling is a trade where tool quality directly affects output quality. A cheap score-and-snap cutter will crack expensive porcelain unevenly; an inadequately notched trowel will produce hollow-sounding tiles with inadequate adhesive coverage; a worn grout float will smear rather than compact grout into joints. Investing in the right tools — and maintaining them — is the difference between a professional finish and a remediation job.

The tool list for tiling is not long, but each item has a specific purpose. Many tradespeople new to tiling underestimate the range of tiling situations: a 100×100mm ceramic bathroom wall tile has completely different tool requirements than a 900×900mm porcelain floor tile. This article covers the full tool list and explains which tools are needed for which applications.

UK-specific context: most UK tiling work is domestic — bathrooms, kitchens, hallways, and conservatories. The dominant materials are ceramic wall tiles, porcelain floor tiles, and increasingly, large-format porcelain slabs (600×1200mm and above). Large-format work requires additional tools not needed for standard tiling: suction lifters, T-support bars, and larger notched trowels.

Key Facts

• Notched trowel size for mosaics (≤100mm): 3–6mm V-notch or U-notch
• Notched trowel size for standard tiles (200–400mm): 8–10mm U-notch or square notch
• Notched trowel size for large format (≥600mm): 12–15mm square notch
• Adhesive coverage BS 5385: Minimum 65% adhesive contact for internal walls; 80% for floors; 100% (back-buttered) for external or wet areas
• Score-and-snap cutter: Suitable for ceramic and some porcelain up to approximately 10mm thick; not suitable for hard porcelain or natural stone
• Wet saw (angle grinder with diamond blade): Required for porcelain, natural stone, and all cuts to within 5mm of tile edge
• Tile nippers: Curved/profile cuts for pipes, outlets — pair with wet saw for clean radius cuts
• Spirit level (1.2m minimum): Critical for setting out reference lines — never rely on a room corner as a straight reference
• Tile spacers: Sizes from 1mm (minimal grout joint) to 5mm (standard floor) to 10mm (rustic/exterior); plastic cross or T-types
• Lippage: Height difference at the joint between two adjacent tiles — maximum 1.5mm for flat surface per BS 5385
• Levelling clip system: Reduces lippage on large-format and floor tiles; uses reusable wedges and disposable clips
• Rubber mallet: Used with levelling clips and for bedding tiles — never use metal hammer directly on tiles
• Tile trim (Schluter, Dural): Provides clean edge finish at exposed tile edges and movement joints
• Grout float: Rubber-faced or EVA foam faced — used to press grout into joints and remove excess
• Angle grinder: 115mm or 125mm with diamond blade — for cutting tiles and cutting out grouted joints

Quick Reference Table

Detailed Guidance

Cutting Tools

Score-and-snap cutter: The workhorse for ceramic wall tiles. A tungsten carbide scoring wheel runs along a guide rail, scribing a line in the glaze and body of the tile. Lever pressure then snaps the tile cleanly along the score line. Quality matters: cheap cutters have sloppy guide rails that produce diagonal breaks. Invest in a branded cutter (Rubi, Sigma, Battipav) for consistent results.

Score-and-snap cutters fail on hard dense porcelain (the tile body doesn't snap cleanly), on tiles under 20mm wide (insufficient lever pressure), and on natural stone. For all these, use a wet saw.

Wet saw: An electrically powered diamond blade, water-cooled, for precise straight cuts and angled mitres. Available for rent or purchase. A 250mm blade on a table-top saw handles most residential work. For mitred edges on large format tiles (45° bevel cuts), a tilting table is needed. Wet saws produce less dust than dry cutting but still require appropriate PPE.

Angle grinder with dry diamond blade: For cutting out old grout, making curved cuts with tile nippers, and trimming. Produces significant silica dust — always use forced-air powered respirator (FFP3 minimum) and on-tool extraction. Never cut dry porcelain in an enclosed space without extraction.

Tile nippers: Tungsten-tipped jaws that bite small pieces off a tile edge for curved cuts. Used in conjunction with a scored line to break the tile toward the curve. Technique takes practice — work in small increments. Diamond-tipped nippers are available for harder materials.

Setting Out and Reference Lines

The most critical tool in tiling is arguably the pencil and spirit level used to establish datum lines. Never start from a wall corner — corners are rarely plumb or square. Always establish a true horizontal datum using a long level (1.2m minimum) and mark a chalk line or pencil line.

For floors: establish a centre point or work from the most prominent visible line (usually the door threshold or a kitchen island). Work out from the centre to minimise awkward small cuts at edges. Dry-lay tiles without adhesive to check the layout before committing.

For walls: fix a horizontal battom (datum batten) of planed timber at exactly the right height so that the bottom course of tiles sits above it. This ensures every course is level regardless of the floor level. Remove the batten and fill the bottom course last (cut tiles to fit).

Laser levels are increasingly used by professional tilers — a self-levelling cross-line laser replaces the chalk line and spirit level combination and is faster on large areas.

Notched Trowels and Adhesive Coverage

The notched trowel is the tool most often underspecified. Its purpose is to deposit a consistent, combed layer of adhesive that will be compressed and spread as the tile is pressed onto it, achieving the required coverage percentage.

Trowel notch size determines the volume of adhesive deposited — larger tiles need larger notches to ensure full coverage, especially under load-bearing floor tiles. BS 5385 Part 1 specifies minimum coverage: 65% for internal walls, 80% for floors, 100% for external, wet areas, and swimming pools. Inadequate coverage causes hollow-sounding tiles, cracking under point loads, and water ingress.

For large-format tiles, back-buttering (spreading a thin layer of adhesive on the back of the tile with a flat trowel before laying) is standard practice and typically required by the adhesive manufacturer's specification. Back-buttering ensures no air pockets on the back of very large tiles.

Levelling Clip Systems

Lippage (height difference between adjacent tiles) is highly noticeable on large-format and glossy tiles. Manual bedding and levelling is difficult to achieve consistently across a large floor — levelling clip systems make it much easier.

The system works: push a plastic clip under the edge of a laid tile so the clip's T-stem protrudes above the joint. After laying the adjacent tile, push a tapered wedge through the stem to lock both tile edges at the same height. The clips are broken off after the adhesive sets (the stem snaps at floor level) leaving only the disposable clip buried in the joint. Reusable wedge pliers are used to set and remove wedges efficiently.

Popular brands: Raimondi Stafix, Bosch RTL, Rubi Speed Levelys. Costs approximately £30–50 per 100 clips with wedges — an overhead to factor into job price for large format work.

Grout Application Tools

Grout float: A rubber-faced trowel used to press grout into joints and remove excess. The rubber face must be in good condition — a worn smooth float will skid across joints rather than packing grout in. Hold the float at 45° to the joint line to push grout in, then at 90° to scrape excess.

Chamois sponge / tiling sponge: Use the two-bucket method — one bucket of clean water to rinse the sponge, a second to wash the tile face. Wring the sponge almost dry before wiping — excess water will pull grout from joints and dilute the grout on the tile face. Change the rinse water frequently.

Grout squeegee: Useful for epoxy grout (more viscous than cementitious grout) and for grouting mosaic sheets where the surface area of joints is high. The rubber blade forces grout into joints efficiently.

Grout rake / grout saw: For removing existing grout when retiling. Diamond-tipped grout rakes fit in oscillating multi-tools (Fein, Bosch PMF, DeWalt) and remove grout cleanly without damaging tile edges. Manual grout saws are slower but cheaper.

Specialist Tools for Large Format

Suction lifters (vacuum cup handles) are essential for safely handling tiles over 600×600mm — the tiles are heavy (a 900×900mm porcelain slab can weigh 20–30kg) and have no edge to grip. Single cup lifters handle tiles up to 600mm; dual-cup lifters are needed for larger slabs. Some large format work requires two operatives regardless.

T-support bars (or "tile ladders") are horizontal timber or aluminium bars that are temporarily fixed to the wall to support large wall tiles while the adhesive sets. Without support, large wall tiles slide down before the adhesive grabs, wasting adhesive and time.

Frequently Asked Questions

Can I cut porcelain with a score-and-snap cutter?

Standard porcelain — possibly, if the cutter is high quality (Rubi TX or equivalent) and the blade is sharp. Hard through-body porcelain and rectified porcelain tiles are better cut with a wet saw — the score-and-snap method produces a higher rate of cracked tiles on dense material. Never attempt to score-and-snap natural stone.

What is the difference between a V-notch and U-notch trowel?

V-notch trowels produce ridges with a sharp V profile — the adhesive ridges are taller but narrower. They are typically used for smaller tiles and thinner adhesive beds. U-notch trowels produce wider, more rounded ridges with better coverage per ridge, and are generally preferred for floor tiles. Square-notch trowels produce flat-topped ridges and are preferred for large format tiles.

Do I need a levelling clip system for every tiling job?

No — for standard 300×300mm or smaller tiles, manual levelling by eye with a level is sufficient. Levelling clips are most valuable for large format tiles (600mm+), glossy finishes where lippage is highly visible, and floors where there will be foot traffic before the adhesive sets. Factor the cost into large format jobs.

How often should I replace my grout float?

When the rubber face begins to harden, crack, or wear smooth. A flat smooth float will drag rather than pack grout. Most floats last for 20–30 grouting sessions depending on material hardness. Epoxy grout is harder on floats than cementitious grout.

Regulations & Standards

• BS 5385 Part 1 (Wall and floor tiling — ceramic and mosaic tiling) — adhesive coverage, flatness, and workmanship requirements

• BS 5385 Part 3 (Internal and external ceramic floor tiling) — floor-specific requirements

• BS EN 12808 (Grout for tiles) — cementitious and reactive resin grout performance requirements

• COSHH Regulations 2002 — dust control for silica when cutting tiles

• Rubi Tools Technical Resources — tiling tool selection guides and cutting technique

• British Ceramic Tile Technical Guidance — tool and adhesive selection by tile type

• Tile Association Technical Bulletins — BS 5385 interpretation and tiling standards guidance

• LABC Technical Guidance on Tiling — building control requirements where relevant

• Schluter Systems Technical Documentation — tile edge trim and movement joint specification

• large format tiles — detailed guidance on laying 600mm+ tiles

• mosaic tiling — specific tools and techniques for mosaic sheet installation

• natural stone — additional tools and considerations for stone tiling

• external tiling — tools and materials for outdoor tiling