Kent · England
New Build Mastic in New Ash Green
New build mastic for New Ash Green, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Untidy sealant flagged on a snagging list
- Kitchen sealant that has pulled off the wall
- Leaking shower tray seals in a new home
When it isn’t the sealant
Sealant isn’t the answer to every problem, and we will tell you before work begins. It will not solve:
- Cracked trays, tiles or worktops
- Your warranty claim itself, which is between you and the builder
- Settlement cracks that need a surveyor
If in doubt, phone 0345 464 0079 or send us an email and we’ll say what we think.
Surfaces we seal
- Show homes
- Kitchens
- Windows & doors
- Plot handovers
- Skirting & floors
- Bathrooms & en suites
New build mastic in New Ash Green, done properly
We never seal over a failed new-build bead. New silicone will not bond to old silicone, so the joint is cut out, cleaned, dried and resealed. Common call-outs are for internal frame sealant that has split and gaps opening as the house dries out and settles, on kitchens, windows & doors and plot handovers.
Somewhere as small as New Ash Green, new homes tend to be conversions, self-builds or a few houses rather than an estate. Every one needs its sealant and floor joints done properly, whatever the size of the site.
Each job carries a 12-month guarantee, large or small.
- Where
- New Ash Green (DA3, TN15)
- Wider area
- Kent
- Guarantee
- 12 months on all our work
- Price
- Quoted before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Towns and villages near New Ash Green
More services for New Ash Green
Quotes for new build mastic in New Ash Green
The price is agreed before any work begins. It’s based on:
- The number and length of the joints
- How easy the joints are to reach
- How many areas need sealing
- The type of sealant required
Rather than a set price list, we look at what your job involves: the amount of work, the old material and the access. The price is agreed before we begin.
Asking for a quote
Photos by email are helpful but not essential. Please mention:
- Whether it’s a home or a business
- How we’d reach the joints
- If someone has resealed it before
- What’s wrong with the joints now
For a quote, call 0345 464 0079 or drop us an email with the location and a short description of the problem. You will have a clear quote before we start.
Landlord and commercial work in New Ash Green
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
For anyone letting property in or around New Ash Green, jobs at different addresses can go on one quote. Just tell us the addresses and what each one needs.
New build mastic in New Ash Green: local notes
London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Around New Ash Green, as everywhere, new build mastic is only as good as the preparation behind it.
New Ash Green is about 5 miles south of Northfleet, in Kent. Whether you’re in the middle of New Ash Green or further out, new build mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Our Kent coverage runs to 922 places, New Ash Green among them. You can also see our page for London, about 20 miles away.
Work in DA3 and TN15 works the same way as everywhere else we cover. That includes homes and businesses on Church Road, Upper Street North and Upper Street South. We also cover Ridley (1 mile south-east), Hartley (1 mile north), New Street (2 miles south-east), Hodsoll Street (2 miles south-east) and Longfield Hill (2 miles north-east). We also work in nearby towns such as Maidstone (12 miles south-east), Dartford (6 miles north-west), Sevenoaks (8 miles south-west), Gravesend (5 miles north-east), Tonbridge (12 miles south) and Northfleet (5 miles north).
Around New Ash Green
Typical jobs here are in homes near The White Swan Public House, Longfield Academy and Rectory Meadow. The closest station to New Ash Green is Longfield station, roughly 2.1 miles north. A little further out are Eynsford Castle (4 miles west) and Darent Valley Hospital (5.2 miles north-west).
What we’re called out for in New Ash Green
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 and the sealant may split.
Most people get in touch after spotting something like this:
- Gaps opening as the house dries out and settles
- Frame joints opening as the plaster dries
- Sealant that never bonded to the surface
- Shower seals failing in the first year or two
For new homes near Longfield station, it’s worth checking the sealant early, while snags are still fresh.
Comparing quotes
- Who does the work, and how experienced they are
- Whether VAT is included
- How the joint is cleaned and prepared
- Which colour the sealant will be
What the job involves on each surface
Plot handovers
Plot mastic is carried out to the developer’s schedule. Each joint is cleaned and primed where needed to keep callbacks down.
Bathrooms and en suites
Baths, showers, basins and trays in new bathrooms are the most common new-build reseal. The old sealant comes out and anti-fungal sanitary silicone goes in after cleaning and priming.
New Ash Green questions
Can you help a landlord with a rental near Longfield station?
Yes, rental work is part of what we do. Just ring 0345 464 0079 or send us an email and tell us about the property, and we will send you a clear quote.
Is New Ash Green within the area you cover?
Yes. New Ash Green is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Where are you based?
Our base is Crawley. We work across South East England, London and Scotland.
Is it messy?
Very little: the area around the joints is protected first, and we tidy up before we go.
Why does sealant fail so quickly in new builds?
A new house dries and settles for a year or two, and sealant is often rushed onto dusty, unprimed surfaces. Both lead to early failure.
Is it worth resealing while the house is still settling?
It depends on whether water is getting through. Failed seals in wet areas need doing now, but cosmetic gaps can wait for movement to slow.
How long does new build mastic take?
It depends on the size of the job, but as a guide it takes anything from a few hours to several days, depending on the number of plots. We’ll tell you when we quote.
Can you do plot mastic on a new development?
Yes. Plot mastic and second-fix sealing for developers is part of our work. Send the schedule and any specification and we’ll give you a quote.
How it works
All our tools and materials come with us in the van. Once we’ve agreed what’s being done, we protect the area and start. Most jobs take a few hours for most snagging lists, longer for a run of plots. Somewhere like New Ash Green needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- We go through the snagging list or plot schedule and agree the joints to do.
- We cut out every bit of the failed or messy sealant.
- Surfaces are cleaned of building dust and primed where needed.
- New sealant suited to each joint is applied and tooled neatly.
- Finally, each room is checked and you are given the cure time.
How to prepare
- Mention any sign-in or site rules at work premises
- Keep pets and children clear of the area while we work
- Mention any leaks or damp you’ve noticed
How to get a quote
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is, and we will talk you through what we’d do. When it suits you, ring 0345 464 0079 or drop us an email.
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Looking after it afterwards
Good habits help new joints last longer. A few tips:
- Do not wait for the house to settle if water is getting through
- Put sealant faults on your snagging list early
- Keep water off fresh sealant until it has cured
- Watch for new gaps as the house dries out
Keep an eye on the joints over the first couple of years. Hairline gaps can open as timber and plaster dry, and they’re simple to reseal once movement has slowed.
Mould takes hold quickly in sealant that has gaps or lifted edges. Dealing with it before it goes black saves a harder job later.