Kent · England
Chislet External Mastic
Sealing brickwork movement joints, render, cladding and façade joints for homeowners, landlords and businesses in Chislet. Fully insured, ARBOMaster approved and guaranteed for a year.
- Old sealant gone brittle and cracked
- Damp patches traced to an open external joint
- Leaking joints around cladding and façade panels
About our external mastic in Chislet
Where two different materials meet, such as brick and render or blockwork and metal, they move at different rates. A flexible exterior sealant takes up that movement where mortar or filler would crack. We work on façade panels, copings & trims and concrete & block, and the jobs we see most are joints pointed up with cement by mistake and moss and dirt in joints with no sealant left.
Around Chislet, older buildings can be stone, brick or timber-framed, many with extensions added later. The joints where those materials meet are the weak points.
Each job carries a 12-month guarantee.
- Place
- Chislet (CT3)
- Wider area
- Kent
- Cover
- A year, on every job
- Quote
- A clear quote up front
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
What affects the cost of external mastic
We do not publish a price list. What we look at:
- Whether there’s mould to deal with
- Which sealant suits the joint
- The number of rooms or windows
- When we can work, for business premises
What you pay reflects the work, not guesswork. That’s why we ask about the job first and agree the price before starting.
What to tell us for a quote
Photos help, but a description is a good start. Try to tell us:
- Any previous sealing or DIY work
- If it’s domestic, commercial or a hotel
- What’s wrong with the joints now
- Roughly how big the job is
It all starts with a short chat. Describe the problem, the location and the size of the job. Whenever you are ready, phone 0345 464 0079 or send us an email.
Towns and villages near Chislet
Also in Chislet
What the job involves on each surface
Copings and trims
Coping and trim joints face rain and sun head on. We reseal them with an exterior sealant suited to the material.
Cladding and façade panels
Where a cladding system has its own specified sealant, we follow it or an approved alternative. Tell us what the building has when you get in touch.
What external mastic looks like in Chislet
Chislet is close to the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. Both are hard on movement joints and outside wall joints, which can dry out and crack sooner where a building faces the weather. London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Managing a site like Chislet Church of England Primary School? Then larger buildings have long runs of movement joint that eventually need resealing. Homes close to Church of St Mary the Virgin include some older properties, and old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Chislet is about 3 miles south-east of Herne Bay, in Kent. Whether you’re in the middle of Chislet or further out, external mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Chislet is one of 922 towns and villages in Kent where we work for external mastic. Chelmsford is on our list too, about 41 miles from Chislet.
We cover every part of CT3 for external mastic. Other places close to Chislet include Hollow Street (1 mile south-west), Chitty (1 mile east), Boyden Gate (1 mile north), Old Tree (1 mile west) and Hoath (1 mile west). Within a short drive, we also cover Canterbury (6 miles south-west), Margate (9 miles east), Dover (14 miles south), Ramsgate (10 miles east), Broadstairs (10 miles east) and Whitstable (7 miles west).
Local landmarks in Chislet
We work in homes and buildings around Grove Ferry Picnic Area, among other places. The nearest railway station is Herne Bay station, roughly 3.7 miles north-west of the centre. A little further out are St Martins Hospital (5.5 miles south-west). The countryside around Chislet includes West Blean and Thornden Woods.
What happens if it’s left?
A low-modulus sealant is chosen because it moves without pulling hard at the edges. That matters on brick, render and concrete, which can be weaker at the face. Too stiff a sealant can pull at the edges and break them. Older cottages and farmhouses around Chislet can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
Every job is a little different, so each one gets its own quote. Size, access and the product the joint needs all play a part, and we’ll explain the quote if you ask.
What you get with us
- We agree the colour with you first
- 20+ years of sealant experience
- Approved under the ARBOMaster scheme
- Arbo and Everbuild products
Take a look at how sealant jobs are priced and customer reviews.
Aftercare tips
So the new joints stay in good condition:
- Look over the joints every year, ideally after winter
- Do not let climbing plants root in the sealant
- Keep water from gutters off the wall
- Tell anyone working on the walls about the movement joints
Only paint over the joint if we have confirmed the sealant can take paint. Paint can crack on a flexible joint and spoil the finish.
A joint that has stopped moving pushes the movement elsewhere, normally as cracking in the brickwork or render nearby. Resealing it early helps prevent that.
Your questions about external mastic in Chislet
Does the coastal weather in Chislet affect outside sealant?
Near the sea, outside joints face more wind, rain and salt than they would inland, so the choice of sealant and the preparation matter even more. It’s worth checking the walls that face the sea first.
Can you help a landlord with a rental near Herne Bay station?
Yes, rental work is part of what we do. Just phone 0345 464 0079 or drop us an email and tell us about the property, and we’ll give you a clear quote.
Can I do it myself?
Some simple jobs can be done by a careful DIYer. Most DIY failures come from sealing over old material, wet joints or too much sealant.
What information do you need?
A short description and the location. If we need more, we will ask.
How long does the job take?
It depends on the size of the job, but most jobs take a few hours to a few days, depending on the length of joint and the access. We’ll tell you when we quote.
Why do you put foam in the joint first?
The foam is closed-cell backing rod. It keeps the sealant at the right depth and bonded to the sides only so it can flex with the joint.
Is the work guaranteed?
Yes. Each job is guaranteed for twelve months, large or small.
Do I need to be at home?
That depends on where the joints are. For work indoors, someone needs to let us in, while outside work can sometimes be arranged differently.
Honest limits
A few problems are outside what sealant work can do:
- Cracking across the wall rather than at a joint
- Adding movement joints to masonry that has none
- Subsidence or other structural problems
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.
Joints and surfaces we work on
- Render & cladding joints
- Brickwork movement joints
- Façade panels
- Copings & trims
- Concrete & block
- Joints between brick and frames
What we’re called out for in Chislet
Some movement joints have been pointed up with mortar by mistake. The joint cannot move, so the wall cracks somewhere else instead.
Signs it’s time to call us include:
- Failed seals between different materials
- Joints with sealant missing in places
- Rain getting behind render or cladding at a joint
- Hard, crazed mastic that has stopped moving
Rented homes near Herne Bay station change hands often, and outside joints that have cracked can let damp into a rental, so check them between lets.
What to look for in a quote
- The length of the guarantee
- How hidden problems are handled
- Who turns up on the day
- Whether all the old sealant comes out first
How it works
There’s no need to move everything out, only the area right around the joints. Everything nearby is protected, and the work takes anything from a few hours to several days, depending on the building in most cases. Somewhere as small as Chislet, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- 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.
- The joint faces are cleaned and primed where the sealant needs it.
- Backing rod goes in next, setting the depth and keeping the sealant off the back of the joint.
- The new sealant, chosen to suit the brick or render, is applied and tooled to a neat finish.
How to prepare
- Mention any tricky access
- For indoor joints, keep the area dry beforehand if you can
- For business premises, tell us about site rules or sign-in
Ask for a quote
We quote each job on its own, so the first step is telling us about yours. Just call 0345 464 0079 or send us an email with the details and send photos if you have them.