Kent · England
External Mastic in Horsmonden
Professional external mastic in and around Horsmonden, with old sealant always removed completely and a 12-month guarantee.
- Plants rooting in failed movement joints
- Damp patches traced to an open external joint
- Leaking joints around cladding and façade panels
External mastic for homes and businesses in Horsmonden
For buildings in Horsmonden, we reseal external joints of all kinds, from brick movement joints to cladding panels. Every joint gets the same careful preparation: clean joint faces and the right depth. We work on copings & trims, render & cladding joints and façade panels, and the jobs we see most are movement joints with cracked, split or missing sealant and hard, crazed mastic that has stopped moving.
Older homes in small places like Horsmonden may be stone, brick or timber-framed, often with later extensions. Where one material meets another is where water normally gets in.
The work is guaranteed for twelve months. If something isn’t right with it in that time, tell us and we will put it right.
- Where
- Horsmonden (TN12)
- Wider area
- Kent
- Guarantee
- A year, on every job
- Quotes
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
How it works
A visit follows a simple pattern: we look at the joints together, protect the area around them, do the work and tidy away. Most jobs take a few hours for a handful of joints, longer for a whole elevation. Somewhere as small as Horsmonden, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- Each joint is checked and the colour of the new sealant agreed.
- We take out the old sealant until the faces are sound.
- Backing rod goes in so the sealant can stretch between the two faces.
- Primer is applied wherever the sealant needs it.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Preparing for the visit
- Move anything stored near the joints
- On commercial sites, let us know about site rules
- Tell us if parking is tricky
Get a quote
Every job is quoted individually, so start by telling us what you need. Just call 0345 464 0079 or drop us an email with the details, and pictures are welcome.
Read more
What affects the quote in Horsmonden
Call for a quick quote. The main things that affect it are:
- Whether there’s mould to deal with
- Whether the work is at height
- Which sealant suits the joint
- How many areas need sealing
Doing several joints on one visit normally makes better use of the time than several visits. We’ll send you a clear quote for the lot.
Helping us quote
Photos by email are helpful but not essential. Try to tell us:
- Roughly how big the job is
- Whether it’s a home or a business
- What’s wrong with the joints now
- Any access issues, like height or stairs
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is. When it suits you, ring 0345 464 0079 or drop us an email.
Walls and rooflines in Horsmonden
Historic houses like Scotney Castle (about 3.4 miles south) are a reminder that the area around Horsmonden has older buildings as well as new. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth. Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Rented homes near Paddock Wood station change hands often, and failed wall and movement joints let damp in, so they’re worth checking between tenancies. Historic houses such as Scotney Castle, about 3.4 miles south, show how far back building around Horsmonden goes.
Horsmonden is about 7 miles east of Royal Tunbridge Wells, in Kent. Across the TN12 area, we can carry out external mastic at your property. 922 places in Kent are on our list, large and small. For nearby work, see our Crawley page (27 miles or so).
Here we cover the TN12 postcode area for external mastic. External mastic is available to properties on Morley Drive, Woodgate Mews and Back Lane. We also cover the places around Horsmonden: Hazel Street (1 mile south-west), Capel Cross (1 mile south-east), Broad Ford (1 mile south-east), Palmer's Green (1 mile north-west) and Castle Hill (1 mile north-west). Within a short drive, we also cover Maidstone (10 miles north-east), Sevenoaks (14 miles north-west), Royal Tunbridge Wells (7 miles west), Tonbridge (8 miles north-west), Kings Hill (9 miles north) and Foley Park (11 miles north-east).
Around Horsmonden
Typical jobs here are in homes near The Highwayman pub, among other places. Horsmonden’s nearest station is Paddock Wood station, roughly 3.4 miles north-west of the centre. Well-known places in the area include Tunbridge Wells Hospital (5.3 miles west) and Finchcocks Musical Museum (2.5 miles south).
Do you need external mastic in Horsmonden?
Weeds, moss and debris in a joint are a sign the sealant has gone. Roots and dirt hold water against the wall and speed up the damage.
Most people get in touch after spotting one of these:
- Plants rooting in failed movement joints
- Joints with sealant missing in places
- Movement joints filled with mortar instead of sealant
- Sealant that has lost its bond to the brick or render
For site and facilities teams at buildings such as Horsmonden Primary School, its movement joints, gutters and trims need looking after like any other building’s.
Before you book anyone
- How long to leave it before use
- How the joint is cleaned and prepared
- What happens if the job turns out different
- How long the guarantee is
How the job changes by surface
Render joints
Cracks along render joints let water in behind the coat. Resealing the joints early keeps water out.
Copings and trims
A failed coping joint lets water into the top of the wall. Resealing them is a small job that protects a lot.
Looking after it afterwards
Joint life depends on how it’s used and looked after. Here’s what we suggest:
- Make sure movement joints aren’t pointed over
- Keep water from gutters off the wall
- Leave the joints unpainted unless we’ve said otherwise
- Get split or bare joints resealed while the damage is small
Look over the joints once a year, ideally after winter. Splits, gaps at the edges or plants in the joint are early warning signs.
Small splits are the time to act. At that stage it’s a simple cut out and reseal with no damage behind it to deal with.
Why deal with it now?
Done well, a resealed joint is a neat, straight line that suits the wall. A hurried job with smeared edges and no backing looks worse and fails sooner. Around Horsmonden, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
The cost depends on how much there is to do, how much old material has to come out and how easy the joints are to reach. We give a clear quote before we start, so you know where you stand.
Why Horsmonden customers choose us
- White, clear, grey or another colour, product permitting
- ARBOMaster approved applicator
- Trusted Arbo and Everbuild sealants
- Homes, businesses and hotels
Horsmonden questions
Will you come out to Horsmonden?
Yes, we do. Our work covers London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Can you help a landlord with a rental near Paddock Wood station?
Yes, we work for landlords and letting agents. You can call 0345 464 0079 or send us an email with the address and a few details, and we’ll give you a fixed price before work begins.
Are you insured?
Yes. We’re fully insured.
Can you seal over the old sealant?
No, it will not last. It may look fine at first, but the new bead soon lifts. The old sealant has to come out completely.
How often do external joints need resealing?
There’s no fixed answer: joints on exposed walls or with a lot of movement age sooner. A yearly look will tell you when they need doing. Every job carries our 12-month guarantee.
What should I tell you?
The location, the problem and the rough size of the job. Photos by email help too.
Will the new joint stand out?
There’s a good range of exterior colours, including greys, browns, whites and stone tones. We pick the one that suits your wall best.
Can you seal joints between two different materials?
Yes. Different materials move at different rates, so the joint between them must be flexible. We choose one that suits both surfaces.
Towns and villages near Horsmonden
More services for Horsmonden
What sealant work can’t fix
Honest advice matters more to us than a booking, so here’s what sealant can’t fix:
- Rising or penetrating damp from elsewhere in the wall
- Render that is blown, hollow or coming away
- Cracked brickwork or render that needs a builder or plasterer
If you are not sure, just ring 0345 464 0079 or drop us an email and we will give you a straight answer before you book.
Where we work in Horsmonden
- Façade panels
- Render & cladding joints
- Copings & trims
- Brickwork movement joints
- Concrete & block
- Joints between brick and frames