Kent · England
External Mastic in Langton Green
External mastic for Langton Green, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Rigid filler in a joint that should flex
- Sealant pulling away from one side of the joint
- Weathered mastic that no longer stretches
When something else is needed
Before booking, it’s worth knowing the limits too:
- Loose or hollow render, which needs re-rendering
- Cracked brickwork or render that needs a builder or plasterer
- Adding movement joints to masonry that has none
If in doubt, phone 0345 464 0079 or email us and we’ll say what we think before you book.
Where we work in Langton Green
- Joints between brick and frames
- Brickwork movement joints
- Render & cladding joints
- Copings & trims
- Façade panels
- Concrete & block
External mastic for homes and businesses in Langton Green
We cut out failed sealant, set the joint depth with closed-cell backing rod and reseal with a low-modulus exterior sealant. The colour is chosen to suit the brick or render so the joint doesn’t stand out. We work on brickwork movement joints, façade panels and joints between brick and frames, and common reasons people get in touch are sealant pulling away from one side of the joint and joints pointed up with cement by mistake.
Around Langton Green, garages, outbuildings and extensions all add to the joints on the outside of a home. Gutter ends, garage door frames and the joints where an extension meets the house are typical spots for leaks.
Whatever the size of the job, you get the same one-year guarantee.
- Place
- Langton Green (TN3, TN4)
- Wider area
- Kent
- Guarantee
- One year on every job
- Price
- A clear quote up front
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
FAQs for Langton Green
Is Langton Green within the area you cover?
Yes, Langton Green is covered. We work across London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
I let a flat near Tunbridge Wells station. Can you help?
Yes. We work for letting agents and landlords as well as homeowners, and several properties can be quoted together. You can call 0345 464 0079 or send us an email with the details for a clear quote.
Will the new joint stand out?
We aim for a joint that suits the wall rather than one that jumps out. We will talk through colour options before work begins from the range available.
Will you leave a mess?
Tidy work is part of the job. Nearby surfaces are protected, and we clear up when we are done.
Can you seal joints between render and window frames?
Yes. The old joint is removed, both surfaces cleaned and primed where needed, and a flexible sealant applied. The colour is chosen to suit.
What is a movement joint?
It’s a deliberate gap that lets the wall expand and contract without cracking. It should be filled with flexible sealant, never mortar.
Can you do several jobs on one visit?
Yes. Tell us about everything you’d like done and we will quote it together.
Why do you put foam in the joint first?
We fit closed-cell backing rod wherever the joint depth needs controlling. It sets the sealant depth and prevents three-sided bonding, so the joint can move.
Also near Langton Green
Also in Langton Green
Can I do it myself?
The biggest DIY mistake is sealing over old sealant. Silicone doesn’t stick to old silicone, so it peels away and traps moisture behind it. Everything old must be removed first.
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
What affects the cost of external mastic
Some jobs are bigger than they look, and some smaller. The main factors:
- Whether old sealant or filler has to be cut out
- The size of the job
- How easy the joints are to reach
- How many rooms, windows or areas are involved
Some things make a job bigger or smaller: the old material and how easily it comes out, any mould to treat, and whether the work is at height. We take all of that into account in your quote.
Asking for a quote
To help us quote quickly, let us know:
- The type of property
- Pictures of the joints, sent by email
- The address or postcode of the job
- Any access issues, like height or stairs
We don’t publish a price list, because every job is different. Instead, we give you a clear quote for your job. To get started, call 0345 464 0079 or send us an email.
Work for landlords, hotels and businesses
We regularly work with letting and managing agents. Tell us the address, the job and how access works.
From a single let to a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a one-year guarantee.
Common problems we fix in Langton Green
Using the wrong sealant is another common reason. A high-modulus or general-purpose sealant can be too rigid for a busy joint, so it pulls away from the edges.
These are the problems we are asked about most:
- Weathered mastic that no longer stretches
- Damp patches traced to an open external joint
- Weeds or debris growing in open joints
- Failed seals between different materials
For an older house near a landmark such as Church of All Saints, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Before booking anyone
- How much experience the applicator has
- What product goes in the joint
- What the quote includes, VAT included or not
- Are they insured?
Why it’s worth doing now in Langton Green
A low-modulus sealant is chosen because it moves without pulling hard at the edges. That protects surfaces like brick, render and concrete. Too stiff a sealant can pull at the edges and break them. Around Langton Green, water from a failed joint in an older home can soak into timber and plaster, which is far harder to put right than the sealant itself.
The cost depends on how much there is to do, how hard the old material is to remove and access to the work. You will have a clear quote before any work starts, so you know where you stand.
Why Langton Green clients choose us
- Anti-fungal sanitary silicone in wet areas
- Full insurance on every job
- Old sealant always removed completely
- Over 20 years’ experience
Take a look at how sealant jobs are priced and customer reviews.
What external mastic looks like in Langton Green
Historic houses like Groombridge Place (about 1.5 miles south-west) are a reminder that the area around Langton Green has older buildings as well as new. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material. 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.
Rented homes near Tunbridge Wells station change hands often, and outside joints that have cracked can let damp into a rental, so check them between lets. Managing a site like Langton Green Primary School? Then movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Langton Green is about 2 miles west of Royal Tunbridge Wells, in Kent. From the centre of Langton Green to the outskirts, we cover external mastic for every kind of property. 922 places in Kent are on our list, large and small. We also work in Crawley, around 18 miles away.
Postcode districts we cover here for external mastic: TN3 and TN4. If you need external mastic at a property on Ryders, Little Footway and Hazelbank or a nearby road, our applicators can take on the job. Nearby, we also carry out external mastic in Rusthall (1 mile east), Bullingstone (1 mile north), Speldhurst (1 mile north), Poundsbridge (2 miles north) and Stockland Green (2 miles north-east). Within a short drive, we also cover Sevenoaks (10 miles north), Tonbridge (5 miles north-east), Kings Hill (13 miles north-east), Paddock Wood (8 miles east), Southborough (3 miles north-east) and Edenbridge (8 miles north-west).
Near you in Langton Green
We work in homes and buildings around Holmewood House School, Bennett Memorial Diocesan School and The Oak pub, among other places. Langton Green’s nearest station is Tunbridge Wells station, roughly 2.1 miles east. Well-known places in the area include Bolebroke Castle (4.8 miles west) and The Amelia (2.1 miles east). The countryside around Langton Green includes Broadwater Warren RSPB Reserve and Barden Lake.
What happens on the day
We keep the work tidy and contained to the area we are working on, so you can get on with your day. Expect the work to take anything from a few hours to several days, depending on the building, and we tell you how long to leave it before we go. For a job in Langton Green, we agree the time, the access and parking before the day. If the work is outside, the weather plays a part, as sealant needs a dry surface.
- We inspect the joints and agree which need resealing and how they’ll be reached.
- We cut out the failed sealant and rake out any dirt or growth.
- We clean both faces of the joint and prime them where the product calls for it.
- Closed-cell backing rod is fitted to set the depth and stop three-sided bonding.
- We gun in a flexible exterior sealant in a colour that suits the wall and tool it neatly.
Before we arrive
- Clear the area around the work
- Mention any tricky access
- Mention any parking rules near the property
How to get a quote
Need a quote? Please call 0345 464 0079 or drop us an email and tell us about the job. We’ll explain what we’d do and give you a clear quote before any work starts.