East Sussex · England
Westham External Mastic
Problem with your movement joints in Westham? We cut out the old, prepare the joints and apply the right sealant, with a one-year guarantee.
- Cracked joints where brick meets render or frames
- Brick movement joints where the sealant has split
- Panel joints letting water in
The process
On the day, we look over the joints with you first, so there are no surprises. We protect the surfaces around the joints before any work begins. The work normally takes a few hours for a handful of joints, longer for a whole elevation. For a village or hamlet like Westham, 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.
- Backing rod sized to the joint goes in to set the depth.
- We apply the sealant, tool it and check the whole run.
Getting ready for the visit
- Try not to wet indoor joints just before the visit
- Let us know about stairs, lifts or work at height
- Let us know about earlier repairs to the joints
How to get a quote
Want a quote for external mastic? Please ring 0345 464 0079 or drop us an email with a few details. You will know what we plan to do, and what it will cost, before any work begins.
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External mastic for homes and businesses in Westham
Short cuts in external joints show up within a season or two. Overfilled joints, missing backing rod and sealant laid over old sealant all tend to fail early. We take the old material out and do it properly. We’re often asked to deal with panel joints letting water in and movement joints filled with mortar instead of sealant, across render & cladding joints, façade panels and concrete & block.
External sealant needs dry, clean surfaces, so work around Westham is planned for dry weather. Tell us about access to all sides of the building, including outbuildings and garages.
Big or small, you get the same one-year guarantee in Westham and across East Sussex.
- Place
- Westham (BN24)
- Wider area
- East Sussex
- Cover
- A year, on every job
- Quotes
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
What affects the cost of external mastic
There’s no set price list, because jobs vary so much. The quote depends on:
- The number of rooms or windows
- The product the joint needs
- Mould in or behind the old joints
- How much old sealant there is and how hard it is to remove
There are no prices on our website, because each job is priced on what it involves. Call for a quick quote.
Helping us quote
To help us quote quickly, please include:
- The rough size of the job
- What’s wrong with the joints now
- Any previous sealing or DIY work
- Access, such as stairs, a lift or height
It all starts with a short chat. Describe the problem, the location and the size of the job, and we’ll talk you through what we’d do. When it suits you, ring 0345 464 0079 or send us an email.
Do you need external mastic in Westham?
If plants are growing out of a joint, the sealant has usually failed or was never there. Dirt and roots then trap moisture in the joint.
Any of these means the joints need attention:
- Old sealant gone brittle and cracked
- Sealant that has lost its bond to the brick or render
- Rigid filler in a joint that should flex
- Moss and dirt in joints with no sealant left
Homes close to St Mary's Church include some older properties, and old and new materials meet at the roofline and walls, which is where sealant earns its keep.
What your quote should include
- What insurance they hold
- What the quote includes, VAT included or not
- Who does the work, and how experienced they are
- What the cure time is
Should I try it myself first?
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
If you are set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it does not work out, we can still put it right.
What happens if it’s left?
An open joint keeps letting water into the wall with every downpour. Wet masonry is more easily damaged by frost near the open joint, so the problem grows beyond the joint itself. Where a wall is exposed, as many are in small places like Westham, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
Combining jobs into one visit is generally more efficient than separate visits, so tell us about everything that needs sealing. You’ll get one clear quote for the whole job.
Why book with us
- Trusted Arbo and Everbuild sealants
- Approved under the ARBOMaster scheme
- Colour agreed with you before we start
- A 12-month guarantee on all work
Read our cost guide or customer reviews.
Questions from Westham
Do you work for landlords with property near Pevensey & Westham station?
Yes, landlords and agents are among the people we work for, 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.
Does the coastal weather in Westham affect outside sealant?
Near the sea, outside joints face more wind, rain and salt than they would inland, so preparation and the right sealant matter all the more. It’s worth checking the walls that face the sea first.
Do you hold any approvals?
Yes. Mr Mastic is an ARBOMaster approved applicator and we are fully insured too.
Will the new joint stand out?
We aim for a joint that suits the wall rather than one that jumps out. We’ll talk through colour options before any work starts.
How long does the job take?
That depends on how much there is to do, but most jobs take a few hours to a few days, depending on the length of joint and the access. We’ll give you a better idea when we quote.
Can you reach joints on upper floors?
That depends on the building and the joints. Where joints can be reached safely, we’ll do them. Give us some details and we’ll confirm the access.
Can I add another job to the visit?
Yes. Tell us about everything you’d like done and you will get one quote.
Can you seal over the old sealant?
No, it won’t last. It can look neat for a few weeks, but the new layer lifts away from the old one. Removing the old sealant completely is the only lasting way.
What external mastic looks like in Westham
Westham is close to the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. That’s hard on movement joints and outside wall joints, especially on the side facing the sea. The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Rented homes near Pevensey & Westham station change hands often, and failed wall and movement joints let damp in, so they’re worth checking between tenancies. If you look after a building such as Pevensey and Westham CofE Primary School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Westham is about 3 miles north-east of Eastbourne, in East Sussex. If you need external mastic in Westham, it’s easy to get a quote: please call 0345 464 0079 or send us an email. We’re based in Crawley and cover East Sussex, Westham included. Across East Sussex, we cover 289 places, and Westham is one of them. You can also see our page for Brighton, about 20 miles away.
Work in BN24 is quoted and booked the same way as anywhere else. We cover properties on High Street, Linkway and Rattle Road and the roads around them. Close by, we work in Jenkins' Green (1 mile north-west), Pevensey (1 mile east), Langney (1 mile south), Pevensey Bay (2 miles east) and Wartling (3 miles north-east). Within a short drive, we also cover Eastbourne (3 miles south-west), Hastings (11 miles east), Bexhill-on-Sea (7 miles east), Seaford (10 miles west), Lewes (14 miles west) and Hailsham (4 miles north-west).
Near you in Westham
We work in homes and buildings around Bishop Bell School and The Heron pub and the streets around them. There’s a railway station in Westham itself: Pevensey & Westham station. Nearby you’ll also find Pevensey Castle (0.6 miles east) and Eastbourne District General Hospital (3.1 miles south-west). Not far away are Combe Hill.
What we can’t put right
We’d rather tell you now than do work that will not last, so here’s what sealant can’t put right:
- Movement that’s more than a sealant joint can take
- Cutting new joints into brickwork, which is building work rather than sealant work
- Rising or penetrating damp from elsewhere in the wall
If in doubt, call 0345 464 0079 or drop us an email and we’ll say what we think.
Surfaces we seal
- Joints between brick and frames
- Concrete & block
- Façade panels
- Brickwork movement joints
- Copings & trims
- Render & cladding joints
Aftercare tips
No joint lasts for ever, but care makes a real difference. A few tips:
- Have failed joints looked at early
- Wash walls gently around the sealant
- Make sure movement joints are not pointed over
- Keep soil, plants and ivy away from the joints
Give the sealant the cure time we tell you before anything rubs against it. Most exterior sealants skin fast but take longer to cure right through.
Leave a failed movement joint and water keeps getting into the wall. That can lead to damp patches, staining and frost damage which cost more to put right than the joint.