Kent · England
New-build mastic & snagging in Southborough, Kent
Plot mastic for developers and snagging failed sealant in new homes for homeowners, landlords and businesses in Southborough. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Shower seals failing in the first year or two
- Cracks appearing as a new home settles
- Sealant work across a run of new homes
About our new build mastic in Southborough
Some owners wait for the first year’s movement before having joints redone. That makes sense for small gaps that are just cosmetic, but a failed shower or bath seal shouldn’t wait. If you’re dealing with kitchen sealant that has pulled off the wall and cracked caulk along new skirting, we can put it right.
In and around Southborough, floors range from older timber boards to tiles and newer finishes, from timber that moves with the seasons to tiles laid on concrete. The sealant at skirtings and thresholds has to suit the floor it meets.
The work is covered for a year after we finish. If there’s a problem with it, please call 0345 464 0079 or send us an email.
- Location
- Southborough (TN4, TN2)
- Region
- Kent
- Cover
- A year, on every job
- Price
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Joints and finishes in Southborough homes
The South East is one of the drier parts of the UK, 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 High Brooms station, the sealant around baths, showers and frames is worth checking in the first year or two. In and around Southborough, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint.
Southborough is about 1 mile north of Royal Tunbridge Wells, in Kent. Across the TN4 area, we can carry out new build mastic at your property. Southborough is one of 922 towns and villages in Kent we cover. Crawley is on our list too, about 20 miles from Southborough.
Here we cover the TN4 and TN2 postcode area for new build mastic. We cover properties on London Road, Church Road and Norton Road and the roads around them. Main roads around Southborough include the A26. Nearby, we also carry out new build mastic in High Brooms (1 mile south-east), Stockland Green (1 mile west), Bidborough (1 mile north-west), Royal Tunbridge Wells (1 mile south) and Speldhurst (2 miles west). Within a short drive, we also cover Maidstone (14 miles north-east), Sevenoaks (9 miles north), Tonbridge (3 miles north), Kings Hill (10 miles north-east), Foley Park (15 miles north-east) and Paddock Wood (6 miles east).
Landmarks near Southborough
Typical jobs here are in homes near Barnett's Wood, St Gregory's Catholic School and Flying Dutchman pub, among other places. The closest station to Southborough is High Brooms station, about 1 mile south-east. Nearby you will also find Kent and Sussex Hospital (1.4 miles south) and Tonbridge Castle (2.8 miles north). For a walk, there’s Tudeley Woods RSPB reserve and Barden Lake.
Nearby places to Southborough
Also in Southborough
What happens if it’s left?
Running a new bead over the builder’s sealant might look tidy for a few weeks, but it will not bond to the old layer. Taking it all out and starting again is the only way to get a lasting seal. Around Southborough, water from a failed joint in an older home can soak into timber and plaster, and that is a much bigger job than renewing the sealant.
No two jobs are quite the same, so each one gets its own quote. Size, access and the product the joint needs all play a part.
Why book with us
- Homes, businesses and hotels
- 20+ years of sealant experience
- 180+ five-star Google reviews
- We agree the colour with you first
Read how sealant jobs are priced and our reviews.
Your questions about new build mastic in Southborough
Will you come out to Southborough?
Yes. Southborough is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Can you help a landlord with a rental near High Brooms station?
Yes, we work for landlords and letting agents. You can phone 0345 464 0079 or email us with the address and a few details, and we will give you a fixed price before any work starts.
Can you quote for more than one area?
Yes, we can. More than one area can go on one quote.
Why has my new-build shower seal failed already?
There are generally two causes: movement as the house dries and settles, and sealant laid onto dust without primer. Cutting it out and resealing properly fixes both.
Who should fix failed sealant in a new build?
While the snagging or warranty period runs, the builder should be your first contact. If they’re slow or the fix does not last, we can help.
Are you an approved applicator?
Yes. Mr Mastic is an ARBOMaster approved applicator and we’re fully insured too.
How long should I leave it?
It depends on the product and the temperature. We tell you how long to leave it before we go.
Will the old sealant be removed?
Yes. We cut out all the old sealant and clean the joint before applying anything new.
Should I try it myself first?
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
What we can’t put right
We’ll always be straight with you, so here’s what sealant cannot fix:
- Leaks from pipes, valves or wastes, which need a plumber
- Your warranty claim itself, which is between you and the builder
- A tray or bath that isn’t properly supported, until it’s fixed
Not sure which it is? You can call 0345 464 0079 or send us an email and we will tell you honestly.
Where we work in Southborough
- Bathrooms & en suites
- Kitchens
- Windows & doors
- Skirting & floors
- Show homes
- Plot handovers
What happens on the day
Good joint work is mostly preparation, so that’s where we spend the time. Every joint is cleaned and dried before new material goes in. In total, it generally takes anything from a few hours to several days, depending on the number of plots. In a smaller place like Southborough, parking is seldom the issue; lanes, gates and long drives are worth mentioning. For outside work, side access and the height of the joints help us plan.
- First, the list of joints is agreed from your snagging sheet or plot schedule.
- Every bit of the old builder’s sealant is cut out, with no layer left behind.
- We clean out the dust and grit left from the build.
- Primer goes on where the surface and product need it, then the new sealant.
- We tool every joint neatly and tell you when each area can be used.
Preparing for the visit
- Mention if the joints have been sealed before
- Tell us about access, such as stairs, a lift or high-level joints
- Move anything stored near the joints
How to get a quote
Asking for a quote is easy: tell us what needs doing and where. A few photos by email make the job easier to understand.
Advice
For landlords and businesses
Water getting past a failed joint can damage the building, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance.
We also work for property managers and facilities teams in Southborough and across Kent. We can quote a run of properties together, and we’re fully insured for the work.
How to look after the new joints
After the cure time, these simple habits help:
- Watch for new gaps as the house dries out
- Ventilate bathrooms well, especially in the first year
- Act quickly if a seal starts to leak
- Follow the cure time we give you
Don’t stand on the bath edge or the lip of the tray in the first few weeks. If a bath or tray moves when you stand in it, get it looked at.
Leave a failed new-build seal and water can reach the floor and the ceiling below. Catching it early keeps the fix to the sealant.
What the job involves on each surface
Skirting and floors
Gaps under skirting are one of the most common new-build snags. We seal it with a flexible sealant that copes with the movement.
Bathrooms and en suites
New-build bathrooms and en suites are where sealant fails most often. The old sealant comes out and anti-fungal sanitary silicone goes in after cleaning and priming.