Greater London · England
New-build mastic & snagging in Charing Cross, Greater London
Our applicators work in Charing Cross on plot mastic for developers and snagging failed sealant in new homes. Old material cut out, joints cleaned and sealed neatly.
- Sealant applied over dusty or wet surfaces
- Skirting joints opening in the first winter
- Leaking shower tray seals in a new home
How the visit works
Every visit runs the same way: we check the joints, mask and protect the surrounding surfaces, do the work and clear up. Most jobs take a few hours in a single home. In a London area like Charing Cross, the main things to plan are parking and access: let us know about parking, the floor we will be working on and any lift or shared entrance.
- We start by agreeing which joints are on the list, from the snagging sheet or plot schedule.
- The old bead comes out in full, with no layer left behind.
- Surfaces are cleaned of building dust and primed where needed.
- New sealant suited to each joint is applied and tooled neatly.
- We check every joint and tell you how long each needs to cure.
Preparing for the visit
- Tell us about any previous sealing or DIY attempts
- For indoor joints, keep the area dry beforehand if you can
- Clear the area around the work
Getting a quote
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is. Whenever you are ready, phone 0345 464 0079 or drop us an email.
Advice
New build mastic in Charing Cross, done properly
New homes move as they dry out. Timber dries and shrinks, and baths and trays settle, so sealant that was laid quickly before handover often cracks. We work on bathrooms & en suites, windows & doors and plot handovers, and common reasons people get in touch are untidy sealant flagged on a snagging list and joints pulling apart as timber shrinks.
Much of London’s new housing is flats in larger developments. Snagging there often goes through the developer or managing agent, and shower seals that fail early, skirting joints that open up and gaps at thresholds are all common snags.
We guarantee the work for a year. If something isn’t right with it in that time, tell us and we will put it right.
- Location
- Charing Cross (W1F, W1D, W1S)
- Region
- Greater London
- Cover
- 12 months on all our work
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Updated
- 26 October 2026
How we quote for new build mastic
There’s no set price list, because jobs vary so much. The quote depends on:
- Access and height
- The product the joint needs
- How many rooms, windows or areas are involved
- Any working-time requirements on site
Leaving a failed joint usually makes the job bigger, not smaller. If you are not sure whether it needs doing, call 0345 464 0079 or drop us an email and we’ll give you an honest view and a quote.
Helping us quote
To make quoting easier, let us know:
- The type of property
- Where the job is, and your postcode
- How we’d reach the joints
- A few pictures by email, if you can
If you are in Charing Cross and need new build mastic, ring 0345 464 0079 or drop us an email. A short description of the job and where it is helps us quote, and we will agree the price before any work begins.
Nearby places to Charing Cross
More services for Charing Cross
Aftercare tips
No joint lasts for ever, but care makes a real difference. Our tips:
- Get a leaking seal dealt with straight away
- Do not seal over failed sealant yourself
- Clean sealant with mild detergent, not abrasives
- Keep pictures and emails about snagging items
Watch the joints as the house settles. Hairline gaps can open as timber and plaster dry.
Lifting sealant traps moisture and mould behind it. Resealing before mould gets in saves a harder job later.
Questions from Charing Cross
Is parking a problem for a job in Charing Cross?
It can be, so it helps to tell us about permits, visitor bays or off-street space when you book. That way the visit can be planned around it.
I let a flat near London Charing Cross station. Can you help?
Yes. We work for landlords and agents as well as homeowners, and several properties can be quoted together. Just ring 0345 464 0079 or drop us an email with the address and what needs doing, and we’ll give you a clear price.
How do I get a quote for new build mastic in Charing Cross?
The cost depends on the size of the job, access and how much old sealant has to come out. Ask us for a quote.
Is it worth resealing while the house is still settling?
For failed seals that let water through, the best time is now. Cosmetic gaps can wait until the first year or two of movement has passed.
Is it normal for sealant to crack in a new home?
Cracking in the first couple of years is common as timber and plaster dry out. Rushed application on dusty surfaces makes it worse.
Does someone need to be in?
We need access to the joints, so we will agree that with you when we book. Indoors, that generally means someone at home.
Where do you work from?
We’re a Crawley-based firm. We work across South East England, London and Scotland.
Are you ARBOMaster approved?
Yes. Mr Mastic is an ARBOMaster approved applicator.
Work for landlords, hotels and businesses
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance.
What we are called out for in Charing Cross
Baths and trays settle under load once the home is lived in. If a bath wasn’t filled when it was sealed, the bead is stretched the first time it’s used.
Keep an eye out for any of the following:
- Gaps opening as the house dries out and settles
- New-build shower sealant that has already split
- Sealant applied over dusty or wet surfaces
- Internal frame sealant that has split
Charing Cross is in London, so parking needs planning: let us know about parking bays, permits or a driveway.
Questions to ask before you book
- Which sealant they’ll use, and why
- How the joint is cleaned and prepared
- Whether VAT is included
- Whether they seal over old material or remove it
When it isn’t the sealant
Before booking, it’s worth knowing the limits too:
- A tray or bath that is not properly supported, until it’s fixed
- Leaks from pipes, valves or wastes, which need a plumber
- Broken tiles or a split tray
If you’re not sure, just call 0345 464 0079 or drop us an email and we will give you a straight answer before booking.
What we seal
- Kitchens
- Windows & doors
- Skirting & floors
- Bathrooms & en suites
- Plot handovers
- Show homes
Should I try it myself first?
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
What new build mastic looks like in Charing Cross
Many of London’s new homes are flats in bigger developments, where snags may need reporting through the developer or the managing agent. Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
If you’ve bought a new home near London Charing Cross station, the sealant around baths, showers and frames is worth checking in the first year or two.
Charing Cross is about 1 mile south-east of City of Westminster, in Greater London. We carry out new build mastic for homeowners, landlords and businesses in Charing Cross and the surrounding area, as part of our work across Greater London. 764 places in Greater London are on our list, large and small.
Our applicators cover all of the W1F, W1D and W1S postcode area for new build mastic and the streets around it. If you need new build mastic at a property on Duck Lane, Drury Lane and Bridle Lane or anywhere close by, our applicators can take on the job. You will find Charing Cross on the A4 and A301, so it’s easy for us to get to with everything needed for new build mastic. Nearby, we also carry out new build mastic in St James's (1 mile west), Adelphi (1 mile north-east), Chinatown (1 mile north-west), West End (1 mile north) and Covent Garden (1 mile north-east). Within a short drive, we also cover Kensington (3 miles west), Walthamstow (7 miles north-east), Hoxton (3 miles north-east), Whitechapel (3 miles east), Hampstead (4 miles north-west) and Ruislip (13 miles west).
Around Charing Cross
We work in homes and buildings around Westminster Abbey Choir School, Silver Cross Tavern and Harris Westminster Sixth Form, among other places. You’ll also find London Library (within half a mile west) and Victoria Embankment Gardens (under half a mile east). Charing Cross has its own railway station: London Charing Cross station. Nearby you’ll also find Montfichet's Tower (1.2 miles east) and Royal United Services Institute (under half a mile south). The countryside around Charing Cross includes Barnsbury Wood and St. James's Park Lake.