Kent · England
External Mastic in Seaton
Movement joints in Seaton need attention? We remove the old material, prepare the joints and seal them properly, with a 12-month guarantee.
- Gaps where render, brick and frames meet
- Plants rooting in failed movement joints
- Rain getting behind render or cladding at a joint
External mastic for homes and businesses in Seaton
Joints between dissimilar materials, like brick against render or concrete against a steel frame, see movement from both sides. A flexible exterior sealant takes up that movement where mortar or filler would crack. We are often asked to deal with rain getting behind render or cladding at a joint and panel joints letting water in, across copings & trims, concrete & block and render & cladding joints.
Around Seaton, older buildings can be stone, brick or timber-framed, many with extensions added later. Where one material meets another is where water generally gets in.
Each job carries a 12-month guarantee.
- Location
- Seaton (CT3)
- Wider area
- Kent
- Guarantee
- 12 months on all our work
- Price
- Quoted before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
What affects the quote in Seaton
You will get a clear quote before any work starts. It takes into account:
- Whether there’s mould to deal with
- The number of rooms or windows
- Which sealant suits the joint
- The amount of work
Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed, plus any working-time requirements on site. Call for a quick quote and we will explain what it covers.
Asking for a quote
There’s no need for technical detail. Just tell us:
- Roughly how big the job is
- Whether it has been sealed before
- Access, such as stairs, a lift or height
- Pictures of the joints, sent by email
We quote each job on its own. Simply ring 0345 464 0079 or email us and describe the job, and photos are welcome.
Also in Seaton
Your questions about external mastic in Seaton
Will you come out to Seaton?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Can you do external mastic in Seaton?
Yes, Seaton is within the area we cover. Our work covers London and the South East. You can call 0345 464 0079 or email us and tell us what needs doing, and we’ll give you a clear price.
Is there any odour?
There can be a smell while the sealant cures. Opening a window helps.
How long does the job take?
That depends on the amount of work, but as a guide it takes anything from a few hours to several days, depending on the building. We will tell you when we quote.
Do you do commercial work?
Yes. Larger jobs can be planned room by room or area by area.
Which products do you use?
The product depends on the job: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. Brands we use include Arbo and Everbuild.
What colours does the sealant come in?
The aim is a neat, even joint in a colour that suits the wall. Colour is agreed with you before we begin from the range available.
Should I try DIY first?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
Why deal with it now?
The longer a joint stays open, the more water the wall takes in. Wet masonry is more easily damaged by frost around the joint, so the problem grows beyond the joint itself. Where a wall is exposed, as many are in small places like Seaton, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
Leaving a failed joint generally makes the job bigger, not smaller. If you are not sure whether it needs doing, phone 0345 464 0079 or email us for an honest opinion and a quote.
Why us?
- Old sealant always removed completely
- 180+ five-star Google reviews
- We leave the area clean and tidy
- Anti-fungal sanitary silicone in wet areas
Surface by surface
Render joints
The face of render can be soft, so a sealant that stretches easily protects the edges. Priming is done where the sealant calls for it.
Brickwork movement joints
Brick movement joints are often mistaken for a missing mortar line. Where one has been mortared, we cut it out and reseal it with sealant if the joint can be cleared.
How it works
The work is kept neat and contained to the joints we are treating. The job usually takes anything from a few hours to several days, depending on the building, and we explain the cure time before we leave. For a village or hamlet like Seaton, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- First, the joints are inspected and the access agreed.
- Every bit of old sealant and any mortar or debris is cut out.
- The faces are brushed clean and primed where the product requires it.
- We fit closed-cell backing rod to control the depth.
- The exterior sealant is applied, tooled and checked along its length.
Getting ready for the visit
- Clear the area around the work
- Keep children and pets away from the work area
- On commercial sites, let us know about site rules
Ask for a quote
It all starts with a short chat. Describe the problem, the location and the size of the job. Whenever you are ready, ring 0345 464 0079 or send us an email.
Advice
Keeping the joints in good condition
How long the joints last depends on use and care. We suggest:
- Clear growth from the base of walls and joints
- Leave the joints unpainted unless we have said otherwise
- Check external joints each spring
- Deal with leaking gutters that soak the joints below
Keep the joints clear of soil, plants and climbing growth. Damp material against the sealant shortens its life.
If you can see gaps, plants or bare sections in a joint, have it checked. Early work is quicker and leaves a better finish.
Signs you need external mastic in Seaton
Sunlight, wet weather and frost wear exterior sealant down. In time it goes hard, crazes on the surface and stops stretching, so the joint eventually tears or comes away from one side.
These are the problems we are asked about most:
- Failed sealant between panels on a façade
- Joints pointed up with cement by mistake
- Brick movement joints where the sealant has split
- Water getting into walls through failed joints
For an older house near a landmark such as Church of St Andrew, an extension built onto an older house moves differently, and the joint between them takes the strain.
What to look for in a quote
- Who turns up on the day
- Which sealant they’ll use, and why
- Which colour the sealant will be
- What the quote includes, VAT included or not
Outside joints around Seaton
The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. Historic houses like Goodnestone Park (about 3.2 miles south-east) are a reminder that the area around Seaton 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.
For landlords with property near Bekesbourne station, split movement joints are easy to miss on a rental until damp shows inside. If you look after a building such as Wickhambreaux Church of England Primary School, larger buildings have long runs of movement joint that eventually need resealing.
Seaton is about 5 miles east of Canterbury, in Kent. Wherever you are in the CT3 postcode area, we cover external mastic for homes and businesses. Seaton is one of 922 places in Kent we cover. For nearby work, see our Chelmsford page.
Postcode districts we cover here for external mastic: CT3. Close by, we work in Wickhambreaux (1 mile west), Ickham (1 mile south-west), Bramling (1 mile south), Littlebourne (1 mile south-west) and Bekesbourne (3 miles south-west). Within a short drive, we also cover Canterbury (5 miles west), Margate (11 miles north-east), Dover (11 miles south-east), Folkestone (14 miles south), Ramsgate (10 miles east) and Broadstairs (12 miles north-east).
What’s near Seaton
Typical jobs here are in homes near The Rose Inn, among other places. The closest station to Seaton is Bekesbourne station, about 2.8 miles south-west of the centre. Well-known places in the area include St Martins Hospital (3.6 miles west).
Should I try it myself first?
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
If you’ve already had a go yourself, that is fine. We cut it out and start again, so tell us about it when you ask for a quote.