Greater London · England
Remedial sealant & repairs in Greenhill, Greater London
Remedial sealant for Greenhill, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Repeat leaks from the same joint
- Black mould underneath the bead
- Beads that never stuck properly
Bathrooms and kitchens in Greenhill
London has a lot of flats and conversions, and a failed shower or bath seal in one can show up on the ceiling below, which is why it’s worth fixing early. London’s water is hard, which leaves limescale on sealant, grout and taps.
If you let a flat or house near Hampstead Heath station, botched sealant from a previous quick fix is easier to strip out between tenants. Managing a site like The Royal School? Then we reseal washrooms and kitchens in schools and businesses as well as homes.
Greenhill is about 1 mile north-east of Hampstead, in Greater London. For remedial sealant in and around Greenhill, please call 0345 464 0079 or email us for a quick quote. We cover Greater London from our Crawley base, Greenhill included. We cover 764 towns and villages across Greater London, from the larger towns to small villages.
All of NW3 and NW6 is covered for remedial sealant, from the main roads to the quietest streets. Whether your property is on Back Lane, Well Road and Ornan Road or anywhere close by, our applicators can take on the job. We also cover Hampstead (1 mile south-west), Vale of Health (1 mile north), West Hampstead (1 mile west), Fortune Green (1 mile west) and Haverstock (1 mile south-east). We also work in nearby towns such as London (5 miles south-east), City of Westminster (3 miles south), Marylebone (3 miles south-east), Kensington (4 miles south), St Pancras (3 miles south-east) and Shoreditch (5 miles south-east).
Local landmarks in Greenhill
Around Greenhill, our work takes us to homes and buildings near Cecil Sharp House, Fitzjohn's Primary School and King William IV Public House and the streets around them. Other local landmarks include South Hampstead High School (0.6 miles south) and Hampstead Heath (0.7 miles north-east). Greenhill has its own railway station: Hampstead Heath station. Nearby you will also find New End Hospital (within half a mile north-west) and Montfichet's Tower (4.3 miles south-east). The countryside around Greenhill includes Belsize Wood and Parliament Hill.
About our remedial sealant in Greenhill
A movement joint stops working when its sealant splits or sets hard. The old sealant comes out and backing goes in to control the depth, before resealing with a flexible product suited to the movement. We work on failed movement joints, expansion joints and botched or over-sealed joints, and people most often call us about dark patches showing through the sealant and a shower that leaks however often it’s resealed.
London homes include a lot of flats, conversions and mansion blocks, and many bathrooms sit right above someone else’s ceiling. That makes worn sealant and cracked grout in Greenhill more than a cosmetic job.
Your job is guaranteed for a year, as with all our work.
- Place
- Greenhill (NW3, NW6)
- Wider area
- Greater London
- Guarantee
- One year on every job
- Price
- A clear quote up front
- Call
- 0345 464 0079
- Updated
- 26 October 2026
DIY versus a professional finish
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
A DIY attempt doesn’t rule out a professional job. We remove it and do the joint properly, so just mention it when you contact us.
When to call us in Greenhill
Joint depth matters. A bead bonded on three sides, or laid too thick, can’t flex, and tears at the first real movement. Backing rod or bond-breaker tape prevents it.
Look out for any of the following:
- Worktop sealant that has shrunk and split
- Smears and lumps from a botched reseal
- A shower that leaks however often it’s resealed
- Black mould underneath the bead
If you live in an older home near Rosslyn Hill Unitarian Chapel, bathrooms in older houses have often been refitted more than once, with sealant laid over sealant.
What your quote should include
- What the quote includes, VAT included or not
- Whether they seal over old material or remove it
- Who does the work, and how experienced they are
- When the joint can take water or movement
What sealant work cannot fix
New sealant cannot fix everything, and we’d rather say so up front. Sealant will not put right:
- Older mastics that may need an asbestos check before removal
- A tray or worktop that needs refixing first
- Leaks from a shower valve, waste or pipework (a plumber’s job)
If you are not sure, just call 0345 464 0079 or send us an email and we’ll give you a straight answer.
Joints and surfaces we work on
- Botched or over-sealed joints
- Mouldy bath & shower sealant
- Shrunken worktop sealant
- Failed movement joints
- Leaking tray & enclosure joints
- Expansion joints
How we quote for remedial sealant
Jobs vary more than people expect. What affects the quote:
- Access and height
- How many areas need sealing
- Mould in or behind the old joints
- The type of sealant required
Homes and businesses are quoted the same way: the amount of work, the access and the products needed, plus any working-time requirements on site. Call for a quick quote and we’ll go through it with you.
Asking for a quote
When you contact us, it’s useful to know:
- If someone has resealed it before
- The type of property
- Any access issues, like height or stairs
- Roughly how big the job is
To get a quote, ring 0345 464 0079 or send us an email and tell us where the job is and what the problem looks like. We will give you a clear quote before any work starts.
The process
Most of a good job is in the preparation, and we do not rush it. Every joint is cleaned and dried before new material goes in. In total, it usually takes a few hours, depending on how many layers have to come out. In a London area like Greenhill, the main things to plan are parking and access: let us know about parking, the floor we’ll be working on and any lift or shared entrance.
- Surrounding tiles, trays and frames are protected first.
- Every layer of failed sealant is stripped out.
- We clean and degrease the joint and look for signs of movement or water.
- New sealant goes in once the joint is dry, and is tooled smooth.
- You get the cure time and our view on why the joint failed.
Before we arrive
- Move anything stored near the joints
- Let us know about stairs, lifts or work at height
- Keep pets and children clear of the area while we work
Get a quote
We quote each job on its own, so the first step is telling us about yours. Just phone 0345 464 0079 or drop us an email with the details, and pictures are welcome.
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Towns and villages near Greenhill
Other services in Greenhill
Greenhill questions
Could a tired shower seal in my Greenhill 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.
Do you work for hotels and guest houses in Greenhill?
Yes, hotels and guest houses are among the places we work. Rooms can be done a few at a time, so the building stays open.
Is remedial work guaranteed?
Yes, for 12 months. If we’ve pointed out another problem, getting it fixed helps the new joint last.
Do you cover Greenhill?
Yes. We cover Greenhill and the rest of Greater London, as part of our work across South East England, London and Scotland. To book, call 0345 464 0079 or drop us an email.
Can tenants book the work?
We are happy to deal with the tenant, landlord or agent. Just make sure your landlord agrees.
Should I try DIY first?
Some simple jobs can be done by a careful DIYer. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
Can you remove sealant that is been put over old sealant?
Yes. Each layer is cut out and the residue cleaned off, then the joint is resealed once.
Are you an approved applicator?
Yes. We are an ARBOMaster approved applicator.
Why act early in Greenhill
A joint that has failed twice will fail again unless the cause is dealt with. Finding it, whether movement, water from elsewhere or an unsuitable product, ends the cycle. 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 reflects the work involved, not a rough estimate. That’s why we ask about the job first.
Why us?
- Experience in homes, commercial sites and hotels
- Any old sealant cut out fully, not covered over
- Fully insured
- Over 20 years’ experience
Take a look at how sealant jobs are priced or what customers say.
Work for landlords, hotels and businesses
Failed sealant is one of the commonest items on a check-out report, and it’s easy to sort out between tenants. Several properties can go on one quote.
Landlords and agents in Greenhill can book us as well as homeowners. Sealant work between tenants keeps a property looking cared for.