Greater London · England
Harrow on the Hill Regrouting
Professional regrouting in and around Harrow on the Hill, with old sealant always removed completely and a 12-month guarantee.
- Floor grout that has worn and darkened
- Shower grout that has worn away
- Cracked grout along the bath or tray
Leave it or put it right?
Bleach can lighten stained grout for a while, but mould that has got into grout usually comes back. New grout, with silicone in the corners, deals with the cause. In a London flat, a failed joint rarely stays your problem alone: water from a shower or window joint can reach the flat below, and gaps in fire-stopping matter to everyone in the building.
The cost depends on the amount of work, how much old material has to come out and access to the work. You will have a clear quote before any work starts, so you know where you stand.
Why choose Mr Mastic in Harrow on the Hill
- 4.9 on Google from 180+ five-star reviews
- Quality sealants from Arbo and Everbuild
- Neat joints and a tidy finish
- 20+ years of sealant experience
Read how sealant jobs are priced or our reviews.
Regrouting in Harrow on the Hill
Regrouting is usually paired with resealing. Grout is for the joints between tiles, but internal corners and edges flex, so they’re sealed with silicone rather than grout. Doing both at once leaves the whole area sound. We work on kitchen splashbacks, tiled floors and shower walls, and people most often call us about a grout colour that no longer suits the room and greasy, stained grout behind the hob.
London’s water is hard, so limescale builds up along sealant lines, in grout and on fittings. For a bathroom or kitchen in Harrow on the Hill, getting the joints right keeps water where it belongs and the room looking clean.
We guarantee the work for a year. If there’s a problem with our work within the year, let us know and we will sort it.
- Where
- Harrow on the Hill (HA1, HA0, HA2)
- Wider area
- Greater London
- Guarantee
- A year, on every job
- Price
- A clear quote up front
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Also near Harrow on the Hill
More services for Harrow on the Hill
Harrow on the Hill questions
Is parking an issue for regrouting in Harrow on the Hill?
In much of London, parking needs planning: a visitor permit or a nearby bay makes the day run more smoothly.
Could a tired shower seal in my Harrow on the Hill flat affect the neighbours below?
Yes, and the first sign is often a stain on the ceiling below. Cutting out the old sealant and laying a new bead early stops it getting that far.
Will the sealant be renewed as well as the grout?
We usually do. New grout beside old sealant wouldn’t look right and wouldn’t keep water out.
Can new sealant go over the old?
No. Fresh sealant doesn’t stick to old sealant, and it traps any mould or water underneath. It all has to come out first.
Do you hold any approvals?
Yes. ARBOMaster is the approved applicator scheme for Arbo sealants, and we are part of it.
When can I use the shower again?
Before we leave, we’ll tell you how long to wait. The grout and sealant both need to cure before the shower is used.
Will the old sealant be removed?
Yes, always, and completely. New silicone doesn’t stick to old silicone, so any old material comes out before anything new goes in.
Are you fully insured?
Yes. Mr Mastic is fully insured, with over 20 years’ experience in sealant work.
What sealant work can’t fix
In fairness, there are a few things sealant won’t fix:
- A leaking wet room membrane
- Cracked or broken tiles
- Movement in a stud wall or floor
If in doubt, call 0345 464 0079 or drop us an email and we’ll say what we think.
Surfaces we seal
- Bathroom floors
- Kitchen splashbacks
- Bathroom wall tiles
- Shower walls
- Wet rooms
- Tiled floors
Common problems we fix in Harrow on the Hill
Strong cleaning products and hard scrubbing slowly erode grout. Some bleaches and acid descalers break grout down over time, leaving the joints sunken and rough.
The most common problems we see are:
- Corners filled with grout instead of silicone
- Grout stained black or orange that won’t clean
- Grout that’s cracking and breaking up
- Old grout in a dated colour
In the older streets around Christ Church, timber floors under older bathrooms flex, so joints need a sealant that moves with them.
What your quote should include
- Which colour the sealant will be
- Is the old sealant removed completely?
- How the surfaces are prepared before sealing
- Whether the sealant suits the joint
Harrow on the Hill homes and their sealant
London’s water is hard, which leaves limescale on sealant, grout and taps. In a London flat, water from a failed bath or shower seal can reach the neighbours below, which is why it’s worth fixing early.
Schools such as St George’s Primary Catholic Voluntary Academy are buildings too, and washroom and kitchen sealant there needs the same care as at home, and schools and businesses are part of our work as well as homes. As a London address, Harrow on the Hill can be tricky for parking: tell us about permits, visitor bays or off-street space when you book.
Harrow on the Hill is about 1 mile south-east of Harrow, in Greater London. For regrouting in and around Harrow on the Hill, please call 0345 464 0079 or email us for a quick quote. We are based in Crawley and cover Greater London, Harrow on the Hill included. Harrow on the Hill is one of 764 towns and villages in Greater London where we work. There’s also a page for London, about 11 miles away.
Jobs for regrouting in HA1, HA0 and HA2 is quoted and booked the same way as anywhere else. We cover properties on New Road, Amery Road and London Road and the roads around them. Neighbouring places we cover for regrouting include Roxeth (1 mile west), Northwick Park (1 mile north-east), South Harrow (1 mile west), Harrow (1 mile north-west) and Sudbury (1 mile south-east). Further out, we also cover London (11 miles south-east), City of Westminster (9 miles south-east), Marylebone (9 miles east), Kensington (7 miles south-east), St Pancras (10 miles east) and Shoreditch (11 miles east).
Landmarks near Harrow on the Hill
Around Harrow on the Hill, our work takes us to homes and buildings near Northwick Park, St Dominic's Sixth Form College and Orley Farm School. Harrow on the Hill’s nearest station is Sudbury Hill Harrow station, about 0.5 miles south. Nearby you’ll also find Kodak Museum (2 miles north) and Clementine Churchill Hospital (within half a mile south-east). Open spaces near Harrow on the Hill include Middle Lake and Northala Fields.
Surface by surface
Wet rooms
New grout in a wet room keeps the surface sound. It cannot fix waterproofing below the tiles.
Corners and edges
The joint between tiles and a bath, tray or worktop gets silicone. Grout in that joint wouldn’t last.
For landlords and businesses
For anyone letting property in or around Harrow on the Hill, jobs at different addresses can go on one quote. Just tell us the addresses and what each one needs, and photos by email help.
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
How it works
On the day, we look over the joints with you first, so there are no surprises. Surfaces next to the work are protected before we start. The work normally takes a few hours for a shower enclosure, longer for a whole room. In Harrow on the Hill, as in most of London, parking needs a little planning. It helps if you can point us to a visitor permit or a bay close to the door.
- We agree the area to be regrouted and point out any loose tiles.
- We remove the old grout carefully.
- Dust is cleared from every joint.
- We grout the joints and wipe the tiles clean.
- Internal corners and edges are resealed.
Before we arrive
- Plan for the work area to be out of bounds to pets and children
- Let us know about earlier repairs to the joints
- Mention any parking rules near the property
How to get a quote
Want a quote for regrouting? Please ring 0345 464 0079 or email us with a few details. You’ll know what we plan to do, and what it will cost, before any work begins.
Read more
Should I try it myself first?
The biggest DIY mistake is sealing over old sealant. Silicone does not stick to old silicone, so it peels away and traps moisture behind it. All the old material has to come out first.
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions, and the work is guaranteed for a year.