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Tile Installation

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Tiling covers floors, walls, splashbacks and showers, in ceramic, porcelain and natural stone. It is the most permanent of the common floor finishes and the least tolerant of a poor base, because a tiled floor is a rigid sheet made of brittle pieces held together by adhesive and grout. If the structure beneath it moves, the tiles cannot, so the movement comes out as cracked grout lines, hollow tiles or a crack straight across a slab of porcelain.

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In British houses that makes the substrate the first conversation. A modern concrete floor with a screed is an ideal base once it is flat and dry. A suspended timber floor, which is what most Victorian, Edwardian and inter-war homes have downstairs and almost every house has upstairs, deflects under load and moves with the seasons, so it normally needs overboarding or an uncoupling layer before tiles go anywhere near it. Wet areas need tanking, because grout is not waterproof and a shower wall relies on the membrane behind the tiles.

Tiling is also the flooring trade with the most significant dust risk. HSE describes silica as a major constituent of construction materials such as bricks, tiles, concrete and mortar, and says dust is generated from those materials during common tasks including cutting, drilling, grinding and polishing. It states that more than 500 construction workers are believed to die from exposure to silica dust every year. How a tiler cuts is therefore a fair question to ask before you let anyone start.

How a tiling job runs, from substrate to grout

  • Assess the substrate: whether it is a slab, a screed or a suspended timber floor, how flat it is, how much it deflects underfoot and whether it is dry.
  • Strengthen or overboard where needed: additional noggins or a thicker deck under a timber floor, tile backer boards, or an uncoupling membrane to isolate the tiles from movement below.
  • Level and prime: a levelling compound where the base undulates, then the primer the adhesive manufacturer specifies for that surface.
  • Tank wet areas: a waterproof membrane or tanking system behind shower walls and across wet room floors, dressed into the drain and up behind the tray, before tiling starts.
  • Set out: finding the centre lines and the sightlines so cuts fall in the least conspicuous places and full tiles land where the eye goes first.
  • Fix: notched trowel, the correct bed thickness, and solid coverage under floor tiles rather than dabs, which is what stops hollow spots and cracked corners later.
  • Leave movement joints where the specification requires them, including at the perimeter and over structural joints, rather than grouting tight to every wall.
  • Grout, clean off and seal: grouting once the adhesive has cured, then sealing natural stone or the grout where the product needs it, and siliconing internal corners and the junction with baths and trays.

Silica dust when tiles are cut, and how a good tiler controls it

Cutting tiles is the point where a tiling job creates a genuine health risk rather than just mess. HSE says silica is a major constituent of construction materials such as bricks, tiles, concrete and mortar, and that dust is generated from these materials during many common construction tasks including cutting, drilling, grinding and polishing. Its construction dust guidance states that more than 500 construction workers are believed to die from exposure to silica dust every year, and that regularly breathing construction dust can cause diseases including lung cancer, asthma, chronic obstructive pulmonary disease and silicosis. HSE's list of specific dusty tasks includes cutting paving blocks, kerbs and flags, cutting roofing tiles, chasing concrete and raking mortar, scabbling or grinding, and dry sweeping.

None of that means tiles cannot be cut in your house. It means the method matters, and the controls are well established under the Control of Substances Hazardous to Health Regulations, which HSE applies through an assess, control and review approach. In practice, a competent tiler will cut wet, using a water-fed bench saw that suppresses dust at the blade, or cut outside, and will use on-tool extraction where a grinder is genuinely needed. They will not dry-cut porcelain with an angle grinder in a closed kitchen while the household carries on around them, and they will not dry sweep the debris afterwards, because that puts the settled dust straight back into the air.

As the customer you have a direct interest in this, because the dust ends up in your home. Reasonable things to ask, and to see in writing, are where cutting will happen, whether it will be wet cut, how the work area will be separated from the rest of the house, and how the site will be cleaned at the end of each day. A tiler who has thought about it will answer immediately; one who is surprised by the question is telling you something useful.

Adhesives, backer boards, uncoupling membranes and grout

  • Cement-based adhesives: the standard fixing for floors and most walls, mixed on site, with flexible grades specified for timber floors and underfloor heating.
  • Ready-mixed adhesives: convenient for small dry wall areas, but not the product for floors, wet areas or heavy porcelain.
  • Tile backer boards: lightweight insulated or cement-based boards that give a stable, water-tolerant surface over timber floors and stud walls.
  • Uncoupling membranes: a layer bonded between the substrate and the tiles that lets small movement happen underneath without transferring it into the tile bed.
  • Tanking systems: liquid membranes or sheet systems used in showers and wet rooms, dressed into corners and around the waste before tiling.
  • Primers: matched to the substrate, and skipping them is a common reason adhesive fails to bond to a dusty screed or a sealed board.
  • Grout: cementitious for most domestic work, with epoxy grouts used where chemical resistance or staining is a particular concern, and a colour choice that changes how a floor reads far more than people expect.
  • Silicone: used at internal corners, at the perimeter and where tiles meet a bath or shower tray, because those junctions move and grout would crack.

Old floors, flats and building control: the rules around a tiling job

Tiling itself rarely involves building control, but what a tiling job disturbs sometimes does. If an old floor covering is being lifted first in a property built or refurbished before the year 2000, the asbestos question applies exactly as it does to any other flooring work: HSE says asbestos may be part of any building of that age, that it was added to products including PVC and thermoplastic floor tiles and screed materials, and that the response to a suspect material is to stop work immediately, confirm what it is or assume it is asbestos, and carry out a risk assessment. Screed materials being on that list matters particularly for tilers, since preparing a floor can mean cutting into the screed.

Structure is the other trigger. Tiles and a tile bed are heavy, especially in natural stone, and strengthening a suspended timber floor to carry them can mean work that goes beyond a covering. In England and Wales, gov.uk sets out when building regulations approval is needed for alterations; in Scotland, mygov.scot lists building or removing load-bearing walls and other structural elements among work that needs a building warrant, valid for three years; and Northern Ireland works to the Building Regulations (Northern Ireland) 2012 with its own technical booklets, including Technical Booklet C on site preparation and resistance to contaminants and moisture. If a tiler proposes altering joists rather than adding a deck on top of them, that is the moment to involve building control.

In flats, sound is worth raising before a hard floor is chosen. The building regulations requirements on resistance to the passage of sound apply when flats are built or created by a material change of use, not when an existing flat changes its floor finish, so the practical constraint is usually the lease: government guidance notes that many leases require permission for alterations and that an administration charge may be payable for the landlord's written consent. An acoustic uncoupling or sound-reducing mat under the tiles is the normal way to satisfy a lease that permits hard floors subject to conditions.

Porcelain, ceramic and natural stone: choosing tiles for a British home

  • Porcelain: dense and low porosity, hard wearing and well suited to floors, hallways and wet areas, but harder to cut, which makes dust control and blade choice more important.
  • Ceramic: lighter and easier to cut, ideal for walls and splashbacks, and used on floors where the tile is rated for floor use.
  • Natural stone: limestone, slate, marble and travertine, each with its own porosity and sealing requirements, and heavy enough that the floor structure needs checking first.
  • Large format tiles: fewer grout lines and a calm look, but they demand a flatter base than small tiles and are less forgiving of any deflection.
  • Textured and anti-slip finishes: relevant for bathroom floors, wet rooms and any tiled area that gets wet, and a sensible request where an older person or a child uses the room.
  • Rectified edges: machine-trimmed so tiles can be laid with very narrow joints, which looks sharp but leaves nowhere to absorb an uneven base.
  • Tile size versus room size: small rooms full of fittings need more cuts, so the labour goes up even when the tiled area goes down.

Looking after tiles, grout and silicone

  • Clean with a pH neutral product, especially on natural stone, since acidic cleaners etch limestone, marble and travertine.
  • Reseal natural stone and, where specified, the grout, on the schedule the supplier gives, because the seal is what keeps a porous stone from staining.
  • Ventilate bathrooms and shower rooms properly with an extract fan run long enough after use, as persistent moisture is what blackens silicone and grows mould in corners.
  • Replace silicone at baths, trays and internal corners when it discolours or lifts, rather than trying to clean it indefinitely.
  • Repair cracked grout promptly, since an open joint lets water into the bed and the substrate below.
  • Use mats at doorways to catch grit, which dulls a polished porcelain or stone surface over time.
  • Keep spare tiles from the same batch, because shade and size vary between production runs and a replaced tile from a new batch rarely disappears.

What drives a tiling price, and finding tilers through LokalMatch

Two tiling quotes for the same room can be far apart because they are describing different jobs beneath the surface. One may include an uncoupling membrane and a tanked shower; the other may assume tiles go onto what is already there. The other big variable is cutting: a bathroom full of fittings, a herringbone or brick bond layout, mitred external corners and large format porcelain all multiply the number of careful cuts, and cutting is the slow, skilled, dusty part of tiling.

LokalMatch gives you one place to set that out. Describe the tiling job once, including the room, the substrate, whether it is a wet area, the tile type if you have chosen it and anything you know about the existing floor, and matched tilers covering your postcode get in touch with you. Pros pay for the requests they receive. LokalMatch does not carry out tiling, does not set prices and does not vet, rank or recommend anyone, so ask each tiler how they will prepare the base, how they will tank a wet area and how they will control dust before you decide.

  • The area to be tiled, and how many cuts the layout and the fittings force.
  • The substrate and what it needs: overboarding, backer boards, levelling compound or an uncoupling membrane.
  • Whether a wet area has to be tanked, and how the tray, waste and corners are detailed.
  • The tile itself: large format and natural stone are heavier, slower and less forgiving than standard ceramic.
  • Pattern and setting out, since herringbone, brick bond and mitred corners take far longer than a straight grid.
  • Removing an old tiled floor, which is dusty, heavy work and may raise asbestos questions in an older property.
  • Underfloor heating being installed at the same time, which adds a layer, a commissioning sequence and a wait.
  • Access and protection, including how the route from the door to the room is covered and how waste leaves a flat.

Tile Installation: frequently asked questions

Can I tile directly onto floorboards?

Not straight onto them. Floorboards flex underfoot, move with the seasons and have joints in all the wrong places, and a rigid tiled surface will crack across the grout or through the tiles. The usual solutions are overboarding with plywood or a tile backer board fixed at close centres, or bonding an uncoupling membrane that lets the timber move without transferring that movement into the tiles. A tiler should also check how much the floor deflects and whether the joists need additional support before any of that, because no membrane compensates for a floor that bounces.

Is cutting tiles in the house dangerous?

It can be, which is why the method matters. HSE describes silica as a major constituent of materials including bricks, tiles, concrete and mortar, and says dust is created when they are cut, drilled, ground or polished. It states that more than 500 construction workers are believed to die from exposure to silica dust each year, and that regularly breathing construction dust can cause lung cancer, asthma, chronic obstructive pulmonary disease and silicosis. A competent tiler cuts wet or outdoors, uses on-tool extraction where a grinder is needed, keeps the work area separated and does not dry sweep the debris afterwards.

Does my shower need tanking if the tiles are waterproof?

Yes, because the tiles are not the waterproof layer. Porcelain and ceramic are impervious, but grout joints and the junctions at corners, trays and wastes are not, and water that gets through them ends up in the adhesive bed and the wall behind. A tanking system, whether a liquid membrane or a sheet product, is applied to the substrate before tiling and dressed into the corners, around the waste and up behind the tray, so any water that passes the grout is caught and returned. It is the part of the job you never see and the part that determines whether the wall survives.

Can tiles be laid over underfloor heating?

Tile is one of the best finishes over underfloor heating, because it conducts heat well and is dimensionally stable. What it needs is a flexible adhesive suitable for heated floors, a screed or backer system installed as the heating manufacturer specifies, and the right commissioning sequence: the heating run up and back down before tiling where the system requires it, then brought up gradually rather than switched straight to full output. Movement joints matter more over a heated floor, because the whole build-up expands and contracts as the heating cycles.

Why has the grout cracked along one line in my floor?

A single consistent crack line usually means movement is being transferred into the rigid tiled surface. The common causes are a floor that deflects, a structural or expansion joint in the base that was tiled straight over instead of being carried through the tiles, or tiles grouted hard against the walls with no perimeter joint. Repointing the grout alone will not fix it, because the movement will still be there. The remedy is to find the source, then reinstate the joint as a flexible one, which is why movement joints belong in the specification from the start.

I want to tile the floor of my flat. Is that allowed?

The likely constraint is your lease rather than the building regulations. The sound insulation requirements apply when flats are built or created by converting a building, not when a covering changes in an existing flat, so what governs is the agreement with the freeholder. Government guidance on leasehold notes that many leases require permission to make alterations and that an administration charge may be payable for the landlord's written consent. Where a lease permits hard flooring subject to conditions, an acoustic mat or uncoupling layer under the tiles is the usual way to meet them, and it needs to be in the quote.

Sources

  1. HSE: silica dust in construction (bricks, tiles, concrete and mortar)
  2. HSE: construction dust, health effects and the assess, control and review approach
  3. HSE: construction dust, specific tasks
  4. HSE: locations of asbestos, including floor tiles and screed materials
  5. GOV.UK: when you need building regulations approval (England and Wales)
  6. mygov.scot: when a building warrant is needed in Scotland
  7. Building Control Northern Ireland: technical booklets under the Building Regulations (Northern Ireland) 2012
  8. GOV.UK: How to lease (permission for alterations)

Written by the LokalMatch editorial team. Last reviewed 14 September 2026. How we write and check our guides

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What affects the cost of tile installation

Prices depend on the details of your project. We only publish price ranges when they’re backed by real LokalMatch quote data or reliable sources. Until then, here’s what usually changes the price:

  • Floor area and the number of rooms
  • Type and grade of flooring
  • Removal of the existing floor
  • Subfloor repairs or levelling
  • Stairs, angles and custom cuts
  • Trim, transitions and baseboards

How to compare tile installers before you hire

  • Choose an installer who works regularly with the type of flooring you want, since hardwood, tile, vinyl and carpet each need different skills.
  • Ask them to check the subfloor and moisture levels before giving a final price.
  • Get a written quote that covers removal of the old floor, subfloor prep, underlay, trim and transitions.
  • Ask whether you or the installer will supply the flooring, and who is responsible for ordering extra for waste.
  • Look at recent work in person or in photos, paying attention to seams, edges and transitions.

Questions to ask tile installers before you hire

  • Will you remove and dispose of the old flooring?
  • How will you check and prepare the subfloor?
  • Is my space suitable for this type of flooring, especially in a basement, kitchen or bathroom?
  • Are baseboards, transitions and stair nosings included?
  • Will you move the furniture and appliances, or should I?
  • Does your workmanship warranty cover problems like lifting, gaps or cracked tiles?

Tile installation permits and local rules

Some tile installation work needs a permit or has to meet local bylaws. Rules vary by municipality, so ask your pro whether a permit is needed and who will apply for it — and check with your city or town if you’re unsure.

Permits and licensing

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