Greater London · England
Brasted Chart New Build Mastic
New build mastic for Brasted Chart, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Sealant applied over dusty or wet surfaces
- Leaking shower tray seals in a new home
- Gaps behind new kitchen upstands
New build mastic in Brasted Chart, done properly
Snagging sealant properly means taking the failed bead out completely. Fresh silicone cannot bond to the old layer, so the joint is cut out, cleaned, dried and resealed. Typical jobs include skirting joints opening in the first winter and sealant work across a run of new homes, across windows & doors, bathrooms & en suites and kitchens.
Much of London’s new housing is flats in larger developments. In a new development, snags are often reported through the developer or the managing agent, and failed shower seals, open skirting joints and gaps at thresholds are typical.
You get a one-year guarantee, the same in Brasted Chart as everywhere else we work.
- Place
- Brasted Chart (TN16)
- Wider area
- Greater London
- Cover
- 12 months on all our work
- Quotes
- A clear price before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
The process
Every visit runs the same way: we check the joints, protect the area around them, do the work and tidy away. Most jobs take a few hours in a single home. For a job in Brasted Chart, parking and access are the things to plan: tell us about permits, visitor bays or off-street space, which floor we are working on and whether there’s a lift.
- We start by agreeing which joints are on the list, from the snagging sheet or plot schedule.
- We cut out every bit of the failed or messy sealant.
- Each joint is cleaned of dust and grit, then primed if required.
- We apply a sealant that suits each joint and tool it to a neat finish.
- Each area is checked and left with its cure time.
Getting ready for the visit
- Mention if the joints have been sealed before
- Where the joints are inside, avoid wetting them before we arrive
- Keep children and pets away from the work area
How to get a quote
Getting a quote is simple: tell us what needs doing and where and its rough size. Photos by email help us understand the job, and we’ll come back to you with a quote.
Read more
What new build mastic looks like in Brasted Chart
London and the South East are among 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 snagging may go through the developer or managing agent.
For new homes near Sevenoaks station, it’s worth checking the sealant early, while snags are still fresh.
Brasted Chart is about 4 miles west of Sevenoaks, in Greater London. Whether you’re in the middle of Brasted Chart or further out, we cover new build mastic for every kind of property, from flats and houses to offices and hotels. 764 places in Greater London are on our list, large and small. There’s also a page for Crawley, about 16 miles away.
Here we cover the TN16 postcode area for new build mastic. We cover properties on Chart Lane and Pipers Lane and the roads around them. Neighbouring places we cover for new build mastic include Brasted (1 mile north), Toy's Hill (1 mile south), Sundridge (1 mile north-east), Ide Hill (2 miles south-east) and Goathurst Common (2 miles south-east). We also work in nearby towns such as Orpington (8 miles north), Thornton Heath (13 miles north-west), Croydon (11 miles north-west), Streatham (15 miles north-west), Bromley (10 miles north) and West Norwood (14 miles north-west).
Landmarks near Brasted Chart
The closest station to Brasted Chart is Sevenoaks station, roughly 3.6 miles east of the centre. Nearby you will also find Tandridge Priory (3.3 miles west). The countryside around Brasted Chart includes Betsom's Hill and Dryhill Nature Reserve.
Leave it or put it right?
The builder is usually the first port of call while the snagging or warranty period runs. If it’s slow, or the same joint keeps failing, a proper reseal from a specialist is the next step. Converted houses in London often have a bathroom above someone else’s living room, 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 Brasted Chart.
There are no prices on our website, because each job is priced on what it involves. Call for a quick quote.
Why Brasted Chart clients choose us
- Full insurance on every job
- Domestic, commercial and hotel work
- Arbo and Everbuild products
- Tidy, careful work
Take a look at what affects the cost or our reviews.
Common questions in Brasted Chart
Is parking a problem for a job in Brasted Chart?
Parking in Brasted Chart, as in most of London, takes a little planning: a visitor permit or a bay close to the door helps a lot.
Can you do new build mastic in Brasted Chart?
Yes, Brasted Chart is within the area we cover. We work across London and the South East. Just phone 0345 464 0079 or send us an email with a few details of the job, and we’ll give you a clear quote.
Is there a guarantee?
Yes, for a year. If there’s a problem with our work in that time, tell us and we will put it right.
Do you work for letting agents?
Yes, we do. We work in homes, commercial premises and hotels.
Where do you work from?
We are based in Crawley, and we work across South East England, London and Scotland.
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.
What does new build mastic cost?
Size, access and the old material all affect the cost. Ask us for a quote.
What sealant do you use?
Quality sealants from brands including Arbo and Everbuild, chosen to suit the joint. We explain the product when we quote.
What sealant work can’t fix
New sealant cannot fix everything, and we will tell you before any work starts. Sealant won’t put right:
- Movement caused by a poorly fitted tray or bath
- Broken tiles or a split tray
- Cracking that points to a structural problem
Not sure which it is? You can ring 0345 464 0079 or email us and we’ll tell you honestly before you book.
Where we work in Brasted Chart
- Show homes
- Windows & doors
- Skirting & floors
- Kitchens
- Plot handovers
- Bathrooms & en suites
Surface by surface
Bathrooms and en suites
En suite showers are a common source of leaks into the room below. Resealing properly keeps water where it belongs.
Windows and doors
Draughts around new frames are often a sealant gap. We look at the joints and reseal where needed.
What affects the quote in Brasted Chart
You will get a clear quote before any work starts. It’s based on:
- The product the joint needs
- How many areas need sealing
- The size of the job
- How easy the joints are to reach
Rather than a set price list, we price the job in front of us: how many joints, what’s in them now and how we reach them. You’ll know the price before we begin.
What to tell us for a quote
When you call or email, these details help:
- The type of property
- How many joints, rooms or windows are involved
- The problem you’ve noticed
- Whether it has been sealed before
It all starts with a short chat. Describe the problem, the location and the size of the job, and we’ll talk you through what we’d do. Whenever you’re ready, phone 0345 464 0079 or drop us an email.
Do you need new build mastic in Brasted Chart?
A new house holds a lot of water from the build, and it dries out over the first couple of years. Drying timber shrinks and pulls joints apart and the sealant has to cope with the movement.
Signs it’s time to call us include:
- Sealant that never bonded to the surface
- Internal frame sealant that has split
- Skirting joints opening in the first winter
- Plot mastic for developers ahead of handover
As a London address, Brasted Chart can be tricky for parking: tell us about permits, visitor bays or off-street space when you book.
Questions to ask before you book
- What preparation is included
- How hidden problems are handled
- Whether they’re fully insured
- Is VAT in the price?
Places near Brasted Chart
More services for Brasted Chart
Should I try it myself first?
Sealing over old silicone is the commonest DIY error. New silicone won’t bond to old, so it peels away and traps moisture behind it. Everything old must be removed first.
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.