Kent · England
New-build mastic & snagging in Sundridge, Kent
Plot mastic for developers and snagging failed sealant in new homes for homeowners, landlords and businesses in Sundridge. Fully insured, ARBOMaster approved and guaranteed for a year.
- Sealant work across a run of new homes
- Skirting joints opening in the first winter
- Sealant that never bonded to the surface
New build mastic in Sundridge, done properly
A new house keeps drying out and settling for its first couple of years. Timber dries and shrinks, and baths and trays settle, and sealant applied in a hurry at handover can split. If you have smeared, uneven beads picked up at snagging and cracks appearing as a new home settles, we can put it right, whatever the surface.
In a village or hamlet like Sundridge, new homes are more likely to be a barn conversion or a handful of houses than a big estate. Every one needs its sealant and floor joints done properly, whatever the size of the site.
A one-year guarantee comes as standard.
- Place
- Sundridge (TN14)
- Region
- Kent
- Guarantee
- A year, on every job
- Price
- A clear price before work begins
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
What affects the cost of new build mastic
Your quote is based on your job. We take into account:
- The number of rooms or windows
- Whether there’s mould to deal with
- Any working-time requirements on site
- The number and length of the joints
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. The price is agreed before we begin.
What to tell us for a quote
Photos help, but a description is a good start. Please mention:
- Roughly how big the job is
- How we’d reach the joints
- What the problem is, such as mould, gaps, leaks or cracking
- Where the property is
We do not publish a price list. Instead, your job gets its own clear quote. To get started, ring 0345 464 0079 or send us an email.
When to call us in Sundridge
Sealant is often one of the last jobs before handover. Joints aren’t always cleaned of dust or primed, so the bead never bonds properly.
The most common problems we see are:
- Skirting joints opening in the first winter
- Smeared, uneven beads picked up at snagging
- Sealant that never bonded to the surface
- Internal frame sealant that has split
For new homes near Dunton Green station, it’s worth checking the sealant early, while snags are still fresh.
Questions to ask before you book
- Are they insured?
- What happens if they find a problem under the old sealant
- Which colour the sealant will be
- Whether all the old sealant comes out first
New homes and floors in Sundridge
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.
Around Sundridge, as everywhere, new build mastic is only as good as the preparation behind it.
Sundridge is about 3 miles west of Sevenoaks, in Kent. From the centre of Sundridge to the outskirts, new build mastic is available for homes and businesses alike, from flats and houses to offices and hotels. 922 places in Kent are on our list, large and small. London is on our list too, about 18 miles from Sundridge.
Work in TN14 works the same way as everywhere else we cover. New build mastic is available to properties on Church Road, Chapmans Road and Main Road and the roads around them. Other places close to Sundridge include Brasted (1 mile west), Chipstead (1 mile north-east), Bessels Green (1 mile east), Brasted Chart (1 mile south-west) and Chevening (2 miles north). Larger places within reach include Dartford (12 miles north), Sevenoaks (3 miles east), Royal Tunbridge Wells (12 miles south-east), Gravesend (15 miles north-east), Tonbridge (9 miles south-east) and Northfleet (14 miles north-east).
What’s near Sundridge
Around Sundridge, our work takes us to homes and buildings near The White Hart pub, Montreal Park and Trinity School. Sundridge’s nearest station is Dunton Green station, about 2.4 miles north-east of the centre. Other landmarks nearby include Sevenoaks Museum (3 miles east) and Sevenoaks Hospital (3 miles east). Open spaces near Sundridge include Betsom's Hill and Dryhill Nature Reserve.
Nearby places to Sundridge
What else we do in Sundridge
Common questions in Sundridge
Do you work for landlords with property near Dunton Green station?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. You can phone 0345 464 0079 or drop us an email with the details for a clear quote.
Do you cover Sundridge for new build mastic?
Yes, Sundridge is within the area we cover. Our work covers London and the South East. Just call 0345 464 0079 or send us an email with a few details of the job, and we will give you a clear price.
How much does new build mastic cost in Sundridge?
Size, access and the old material all affect the cost. Call for a quick quote.
When is the sealant fully cured?
That depends on the sealant used, so please follow the time we give you.
Should I try DIY first?
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.
Will you just run a new bead over the existing one?
No. New silicone will not bond to old silicone, so it soon lifts and traps water. The old sealant always comes out first.
Do you take out the old sealant first?
Yes. All of the old material is cut out and the joint cleaned before resealing.
Can I add another job to the visit?
Yes. Several rooms, windows or areas can go on one quote.
The process
Good joint work is mostly preparation, and we don’t rush it. Joints are cleaned back and dried before anything new goes in. All told, the work takes anything from a few hours to several days, depending on the number of plots. Somewhere like Sundridge needs a little journey planning: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided 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.
- We check every joint and tell you how long each needs to cure.
Getting ready for the visit
- Mention any parking rules near the property
- Mention any sign-in or site rules at work premises
- Tell us about access, such as stairs, a lift or high-level joints
How to get a quote
Every job is quoted individually. Simply ring 0345 464 0079 or send us an email and describe the job and send photos if you have them.
Read more
Should I try it myself first?
A DIY attempt doesn’t rule out a professional job. We remove it and do the joint properly, so just mention it when you contact us.
Sealing over old silicone is the commonest DIY error. Silicone doesn’t stick to old silicone, so it lifts and traps water and mould underneath. Everything old must be removed first.
Why it’s worth doing now in Sundridge
A hairline gap at a skirting can wait, but water getting through cannot. Not sure whether yours can wait? You can phone 0345 464 0079 or send us an email with a few pictures and we will tell you. Older cottages and farmhouses around Sundridge can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
The cost reflects the work involved, not guesswork. That’s why we ask about the job first.
Why choose Mr Mastic in Sundridge
- A sealant colour to suit the surroundings
- Every job guaranteed for a year
- Trusted Arbo and Everbuild sealants
- Anti-fungal silicone where joints get wet
Read what affects the cost or what customers say.
Work for landlords, hotels and businesses
From a single let to a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a 12-month guarantee.
Letting agents and landlords in Sundridge can book us as well as homeowners. Sealant work between tenants is a simple way to keep a property in good order before the next move-in.
Keeping the joints in good condition
Joint life depends on how it’s used and looked after. We suggest:
- Use the extractor fan every time you shower
- Keep pictures and emails about snagging items
- Don’t seal over failed sealant yourself
- Check bath and shower seals every few months as the house settles
Keep pictures of the joints and any snagging correspondence with your builder. It’s useful if you need to raise other issues later.
If a shower tray or bath seal splits in the first year, look for movement. Getting it resealed properly, and any movement checked, stops it recurring.