Greater London · England
New-build mastic & snagging in Earl's Court, Greater London
Problem with your new-build sealant joints in Earl's Court? We cut out the old, prepare the joints and apply the right sealant, and the work is guaranteed for a year.
- Cracks appearing as a new home settles
- Plot mastic for developers ahead of handover
- Beads laid onto grit and dust from the build
The process
We keep the work tidy and contained to the joints we’re treating, so you can carry on as normal. Expect the work to take anything from a few hours to several days, depending on the number of plots, and we explain the cure time before we leave. In a London area like Earl's Court, the main things to plan are parking and access: tell us about permits, visitor bays or off-street space, which floor we’re working on and whether there’s a lift.
- We go through the snagging list or plot schedule and agree the joints to do.
- Failed or untidy sealant is cut out completely.
- We clean off dust from the build and prime the surfaces where the product needs it.
- A sealant chosen for each area goes in and is tooled smooth.
- Finally, each room is checked and you are given the cure time.
Before we arrive
- On commercial sites, let us know about site rules
- Let us know about parking restrictions
- Keep children and pets away from the work area
How to get a quote
The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is, and add pictures by email if you can.
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How we handle new build mastic in Earl's Court
Dust is the enemy of new-build sealant. We clean every joint thoroughly and prime where the surface and product need it, so the new bead bonds properly rather than sitting on a layer of grit. We’re often asked to deal with sealant that never bonded to the surface and leaking shower tray seals in a new home, across show homes, bathrooms & en suites and windows & doors.
From brand-new flats to converted terraces with new flooring, London has every kind of floor. Every joint between floor, skirting and threshold has to cope with some movement.
All of our work is guaranteed for twelve months.
- Place
- Earl's Court (W14, W8, SW5)
- Wider area
- Greater London
- Guarantee
- A year, on every job
- Price
- A clear price before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Aftercare tips
No joint lasts for ever, but care makes a real difference. A few tips:
- Ventilate bathrooms well, especially in the first year
- Don’t wait for the house to settle if water is getting through
- Clean sealant with mild detergent, not abrasives
- Keep pictures and emails about snagging items
Follow the cure time we give you before the area gets wet. Silicone is generally left for about a day.
Mould takes hold quickly in sealant that has gaps or lifted edges. Dealing with it before it goes black saves a harder job later.
Questions from Earl's Court
Can parking be tricky for a visit in Earl's Court?
Parking in Earl's Court, as in most of London, takes a little planning: a visitor permit or a nearby bay makes the day run more smoothly.
Do you work for landlords with property near West Brompton station?
Yes, rental work is part of what we do. Just call 0345 464 0079 or send us an email and tell us about the property, and we will give you a clear price.
Do you work for hotels and businesses?
Yes. We work in offices, washrooms, hotels and other commercial premises. Working times can be discussed when we quote.
Do you remove the old sealant?
Yes, every time. New sealant will not bond properly to old, so the joint is cleaned back first.
My new home is still under warranty. Should I contact you?
If you’re still within the builder’s snagging or warranty period, report it to them first. If it isn’t sorted, or keeps failing, get in touch with us.
Can I do it myself?
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.
Are you fully insured?
Yes. We’re fully insured, and we can confirm the details when we quote.
Do you work through snagging lists?
Yes. Photos of each sealant item help us quote. Items that need a plumber, tiler or the builder are flagged.
Work for landlords, hotels and businesses
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements and we will quote.
We also work for property managers and facilities teams in Earl's Court and across Greater London. We can quote a run of properties together, and we’re fully insured.
Why deal with it now?
Running a new bead over the builder’s sealant might look tidy for a few weeks, but it cannot bond to what’s underneath. Taking it all out and starting again is the only way to get a lasting seal. In London conversions, one flat’s bathroom is often above another flat’s ceiling, so a small leak from tired sealant can mean a neighbour’s ceiling and a lot of disruption. Putting it right early is much less trouble for homes in Earl's Court.
Doing several joints on one visit normally makes better use of the time than several visits, so it’s worth mentioning everything you’d like done. You’ll get one clear quote for the whole job.
What you get with us
- 12-month guarantee on every job
- An ARBOMaster approved applicator
- Fully insured
- More than 20 years in sealant work
Should I try it myself first?
If you do try it yourself, take your time over the preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it doesn’t work out, we can still put it right.
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and does not move well, and the joint depth matters as much as the finish.
How the job changes by surface
Bathrooms and en suites
Shower trays in new homes often move slightly in the first year. We reseal once the old bead is fully out.
Show homes
Bathrooms, kitchens and frames in show homes are sealed or resealed to a neat finish ready for viewings. Tell us when the home is open so we can plan around it.
What new build mastic looks like in Earl's Court
The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. Much of London’s new housing is flats in larger developments, where snags may need reporting through the developer or the managing agent.
Earl's Court is in London, so parking needs planning: let us know about parking bays, permits or a driveway. For new homes near West Brompton station, it’s worth checking the sealant early, while snags are still fresh.
Earl's Court is about 1 mile south-east of Kensington, in Greater London. Earl's Court gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a one-year guarantee. Across Greater London, we cover 764 places, and Earl's Court is one of them.
Every address in W14, W8 and SW5 is within our area for new build mastic. Whether your property is on Sun Road, Star Road and Rich Lane or anywhere close by, we can help. Earl's Court sits on or near the A3218 and A3220, which makes travel easy. If you’re just outside Earl's Court, we cover West Brompton (1 mile south), South Kensington (1 mile east), Little Chelsea (1 mile south-east), World's End (1 mile south-east) and Walham Green (1 mile south). Larger places within reach include London (4 miles east), Marylebone (3 miles north-east), St Pancras (4 miles north-east), Shoreditch (6 miles north-east), Walthamstow (10 miles north-east) and Hoxton (6 miles north-east).
Near you in Earl's Court
Around Earl's Court, our work takes us to homes and buildings near Abdus Salam Library, Gwendwr Garden and Courtfield pub. Other local landmarks include The Fulham Boys School (less than half a mile west) and Collingham College (under half a mile east). Earl's Court has its own railway station: West Brompton station. Other landmarks nearby include Montfichet's Tower (4.4 miles east) and Kensington Arcade (0.7 miles north). The countryside around Earl's Court includes Campden Hill and The Long Water.
Nearby places to Earl's Court
Also in Earl's Court
Quotes for new build mastic in Earl's Court
Every job gets its own quote. This is what makes a difference:
- When we can work, for business premises
- Whether there’s mould to deal with
- How easy the joints are to reach
- How many rooms, windows or areas are involved
No two jobs are quite the same, so each one gets its own quote. Size, access and the product the joint needs all make a difference, and we’ll explain the quote if you ask.
What to tell us for a quote
To make quoting easier, please include:
- The problem you’ve noticed
- The rough size of the job
- If it’s domestic, commercial or a hotel
- Where the job is, and your postcode
For a quick quote, get us on the phone, or email us if that’s easier. Tell us about the joints that need doing and we will talk you through the work and send you a clear quote.