Kent · England
Swattenden External Mastic
Sealing brickwork movement joints, render, cladding and façade joints in Swattenden, with a one-year guarantee on every job. Ask us for a quote.
- Joints pointed up with cement by mistake
- Damp patches traced to an open external joint
- Sealant pulling away from one side of the joint
External mastic in Swattenden, done properly
Many failed façade joints only get noticed once there’s a stain or a damp patch inside. We inspect them, agree which need doing and reseal with a weatherproof, flexible sealant. If you have water getting into walls through failed joints and plants rooting in failed movement joints, we can help, whatever the surface.
Older homes in small places like Swattenden may be stone, brick or timber-framed, often with later extensions. The joints where those materials meet are the weak points, and they need the right sealant at the right depth.
The work is guaranteed for twelve months. If something isn’t right with it in that time, tell us and we’ll put it right.
- Where
- Swattenden (TN17)
- Region
- Kent
- Cover
- A year, on every job
- Quote
- A clear quote up front
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
The process
Good joint work is mostly preparation, so that’s where we spend the time. Joints are cleaned back and dried before anything new goes in. In total, it generally takes anything from a few hours to several days, depending on the building. In a small place like Swattenden, access is normally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- Each joint is checked and the colour of the new sealant agreed.
- We take out the old sealant until the faces are sound.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- Primer is applied wherever the sealant needs it.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Before we arrive
- Tell us about any water getting in
- Keep pets and children clear of the area while we work
- Try not to wet indoor joints just before the visit
Get a quote
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints, and add pictures by email if you can.
Read more
Walls and rooflines in Swattenden
Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Schools such as Cranbrook School are buildings too, and its movement joints, gutters and trims need looking after like any other building’s. Homes close to Congregational Church include some older properties, and older walls, gutters and the joints where extensions meet them need a flexible sealant.
Swattenden is about 12 miles east of Royal Tunbridge Wells, in Kent. Homes, rented property, offices and hotels in Swattenden can book us for external mastic, old or new, large or small. Every job comes with our 12-month guarantee. 922 places in Kent are on our list, from the larger towns to small villages. You can also see our page for Crawley, about 31 miles away.
Work in TN17 is quoted and booked the same way as anywhere else. If you’re just outside Swattenden, we cover Hartley (1 mile west), Cranbrook (1 mile north), Baker's Cross (1 mile north-east), Coursehorn (1 mile north-east) and Gill's Green (2 miles south-west). Larger places within reach include Maidstone (13 miles north), Ashford (15 miles east), Royal Tunbridge Wells (12 miles west), Tonbridge (14 miles north-west), Kings Hill (14 miles north) and Foley Park (14 miles north).
Local landmarks in Swattenden
Around Swattenden, our work takes us to homes and buildings near Duke Of York Public House Little Tudor and Crane Valley, among other places. Nearby you will also find Sissinghurst Castle (3.2 miles north-east) and Benenden Hospital (3.9 miles east).
Keeping the joints in good condition
A little care helps the new joints last. Our advice:
- Act on the first splits you see
- Keep water from gutters off the wall
- Keep soil, plants and ivy away from the joints
- Walk round the building once a year and look at the joints
Do not let soil, plants or ivy build up against the new joints. Damp material against the sealant shortens its life.
If you can see gaps, plants or bare sections in a joint, have it checked. Earlier resealing means a smaller job and a better result.
Surface by surface
Concrete and blockwork
Blockwork and concrete shrink over time and move with the seasons. Their movement joints are sealed over backing rod with a flexible sealant.
Brickwork movement joints
Vertical joints in long brick walls let the brickwork expand without cracking. We reseal them with a low-modulus sealant over backing rod in a colour to suit the brick.
When something else is needed
New sealant cannot fix everything, and we’ll tell you before we start. It will not solve:
- Cracked brickwork or render that needs a builder or plasterer
- Cutting new joints into brickwork, which is building work rather than sealant work
- Subsidence or other structural problems
If you are not sure, just call 0345 464 0079 or email us and we will give you a straight answer before you book.
What we seal
- Brickwork movement joints
- Copings & trims
- Façade panels
- Joints between brick and frames
- Concrete & block
- Render & cladding joints
DIY versus a professional finish
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and doesn’t move well, and the joint depth matters as much as the finish.
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, and the work is guaranteed for a year.
Questions from Swattenden
What guarantee comes with external mastic in Swattenden?
All our work, in Swattenden and everywhere else, comes with a 12-month guarantee. We are also fully insured and ARBOMaster approved.
Is Swattenden within the area you cover?
Yes, smaller places are covered as well as towns. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Is it worth trying it myself?
Sometimes. Preparation is everything: all the old sealant out, and a clean, dry joint. If it does not work out, we can redo it.
Are you ARBOMaster approved?
Yes. Mr Mastic is an ARBOMaster approved applicator and we’re fully insured too.
Are you fully insured?
Yes. Full insurance covers our work, and we can confirm the details when we quote.
What is backing rod for?
The foam is closed-cell backing rod. It stops the sealant going in too deep and bonding to three sides.
How long does external mastic last?
There’s no fixed answer: sunny, exposed elevations and busy joints wear faster. Check them each year and reseal when they split or harden. Every job carries our 12-month guarantee.
Do you work for landlords and businesses?
Yes, we do. We work in homes, commercial premises and hotels, and we are fully insured.
Also near Swattenden
What else we do in Swattenden
What affects the quote in Swattenden
The quote reflects the job in front of us. We take into account:
- When we can work, for business premises
- Whether there’s mould to deal with
- The product the joint needs
- The old material and how stubborn it is
Leaving a failed joint generally makes the job bigger, not smaller, as water and mould keep getting in. If you’re not sure whether it needs doing, call 0345 464 0079 or send us an email for an honest opinion and a quote.
What we need to know
When you contact us, these details help:
- The problem you’ve noticed
- Whether it has been sealed before
- If it’s domestic, commercial or a hotel
- Pictures of the joints, sent by email
To get a quote, phone 0345 464 0079 or send us an email with the location and a short description of the problem. You will have a clear quote before any work starts.
Leave it or put it right?
Low-modulus sealants stretch easily, so they put less strain on the joint edges. That protects surfaces like brick, render and concrete. Too stiff a sealant can pull at the edges and break them. Where a wall is exposed, as many are in small places like Swattenden, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
The cost depends on the size of the job, how much old material has to come out and how easy the joints are to reach. We give a clear quote before we start.
Why us?
- Full insurance on every job
- A choice of colours where the product allows
- One-year guarantee on every job
- Colour picked to suit the job
Read our cost guide or what customers say.