Grout Repair near you

Grout fails for three reasons and only one of them is the grout. The first is movement. A tiled surface is rigid, and where it is fixed to something that flexes, such as a suspended timber floor that deflects underfoot or a stud wall that moves when a door slams, the weakest line gives way, and that is the joint. The same applies where tiles have been grouted hard into internal corners and against baths and trays, since those junctions move as the building expands, contracts and takes load. They need flexible sealant, which is why a corner joint that has been grouted will crack again however carefully it is repacked.

The second is water arriving from somewhere it should not. Grout is not a waterproof layer, and it was never intended to be one: in a shower the waterproofing is the tanking behind the tiles. If that tanking is absent or has failed, water passing the grout has nowhere to go, and the joints stay wet, the adhesive bed softens and the grout is pushed out from behind. Persistently damp joints in one part of a shower, especially low down or at the tray junction, are worth investigating before they are simply refilled.

The third is the room itself. The government's damp and mould guidance describes condensation damp, which happens when moisture generated inside the home condenses onto colder surfaces, as the most common form of damp, and lists damaged, blocked, absent or switched-off mechanical ventilation, such as extractors in kitchens and bathrooms, among the internal checks for identifying the cause. It also states that simply removing surface mould will not stop damp and mould reappearing, and that the fundamental cause will be building deficiencies, inadequate ventilation, inadequate heating or poor energy efficiency. A bathroom with a dead extract fan will blacken new grout as readily as it blackened the old.

Regrouting starts with removing the old grout to a consistent depth, using a grout rake, a carbide scraper or an oscillating tool, without chipping the glazed edges of the tiles. Scraping off only the surface skin is the classic shortcut and it guarantees a repeat visit, because new grout needs real depth to bond and hold. The joints are then vacuumed out, dampened if the grout manufacturer calls for it, and packed full with grout worked diagonally across the joints so no air is trapped, then tooled to an even profile before the haze is cleaned off the tile faces. Cement-based grout has to cure before the surface is wetted or sealed, and the curing time stretches in a cold British bathroom, so plan to use another shower for a while.

The dust is the part households underestimate. HSE names chasing concrete and raking mortar, along with scabbling or grinding and dry sweeping, among the specific construction tasks that produce high dust levels, and describes silica as a major constituent of materials such as bricks, tiles, concrete and mortar, with dust generated during cutting, drilling, grinding and polishing. It states that over 500 construction workers are believed to die from exposure to silica dust every year and that regularly breathing construction dust can cause lung cancer, asthma, chronic obstructive pulmonary disease and silicosis. Raking out a full shower enclosure with a power tool in an unventilated bathroom is precisely the situation that guidance is describing.

What good practice looks like is simple enough to specify. Dust extraction fitted to the tool rather than a bare grinder, the bathroom door closed and the area separated from the rest of the home, a vacuum rather than a brush at the end of each day, and the silicone junctions cut out and renewed as a separate operation after the grout has cured. Ask for that in writing, and ask who is cleaning up.

New grout in a badly ventilated bathroom will look like the old grout within a couple of years, so the useful work after a regrout happens in the room rather than in the joints. The government's damp and mould guidance points at mechanical ventilation directly, listing damaged, blocked, absent or switched-off extractors in kitchens and bathrooms among the internal checks for identifying the causes of damp and mould, and suggesting practical habits such as closing internal doors when cooking or showering and opening windows periodically. It also recommends using mould and mildew products in preference to bleach for health and safety reasons, and wearing a mask, gloves and goggles when removing mould, with doors shut and windows open during and after cleaning.

That guidance is careful about where responsibility sits, and it is worth quoting to anyone who has been told their bathroom mould is their own doing. It says it is totally unreasonable to blame damp and mould in the home on lifestyle choices, since everyday tasks such as cooking, bathing, washing and drying laundry unavoidably produce indoor moisture, and that tenants cannot be expected to reduce moisture levels if their home does not enable them to do so. For renters this is more than sentiment: gov.uk tells tenants to contact their landlord if a property needs repairs or has mould, and to approach the local council's environmental health department if repairs are not carried out. Grout repair sits on top of that, not instead of it.

Regrouting needs no approval from a building control body. It is not among the alterations gov.uk lists as needing building regulations approval in England and Wales, which are things like replacing a fuse box, installing a bathroom that involves plumbing, changing electrics near a bath or shower, replacing windows and doors, replacing roof coverings and installing or replacing a heating system. In Scotland, mygov.scot lists the work needing a building warrant as new build, extensions, building or removing load-bearing walls, changing roofs, external walls or other structural elements, loft and garage conversions and demolition, and notes that a warrant is valid for three years and that starting such work without one is an offence. Northern Ireland works to the Building Regulations (Northern Ireland) 2012. None of those catch a grout repair, though a bathroom refit around it may well involve work that does.

Health and safety law is what genuinely applies. Dust is controlled under the Control of Substances Hazardous to Health Regulations, which HSE applies through an assess, control and review approach, and it is the reason a competent tiler uses on-tool extraction and a vacuum rather than a grinder and a brush. Asbestos law can also reach a tiling job, because HSE lists screed materials alongside PVC and thermoplastic floor tiles, stair nosings and sheet materials among the products asbestos was added to, and says asbestos may be part of any building built or refurbished before the year 2000. Cutting into an old screed or bed is therefore a moment to check rather than assume, and HSE's instruction on finding a suspect material is to stop work immediately, confirm what it is or assume it is asbestos, and carry out a risk assessment.

Flooring and tiling are not licensed trades in the UK, so there is no register a tiler has to join before working on your bathroom, and competent person schemes, which allow self-certification of certain building work, are voluntary and organised by trade. The one licence that can bite on this kind of job is the asbestos licence, and HSE is clear that it is an offence to carry out licensable work with asbestos without one.

Regrouting is priced on how much joint there is, how hard it is to get the old material out and what has to happen around it. A shower enclosure in small mosaic tiles has several times the length of joint that the same area in large format tiles does, and every metre of it has to be raked out to depth. Epoxy grout costs more in labour as well as material because it is unforgiving to work with. Renewing the silicone at the bath and the tray is a separate operation, and if the investigation shows water has been getting behind the tiles, the honest quote covers finding out why rather than sealing the evidence in.

LokalMatch lets you put that job in front of several tilers at once. You describe it a single time, saying which room, whether it is a floor, a wall or a shower, the tile and joint size, whether there is mould and how the room is ventilated, and matched tilers covering your postcode contact you directly. Pros pay for the requests they receive. LokalMatch does not carry out grouting, does not set prices and does not vet, rank or recommend anyone, so use the replies to compare how each tiler explains the cause of the failure, and how they plan to keep the dust out of the rest of your home.