West Sussex · England
External & façade joints in East Dean, West Sussex
Movement joints in East Dean need attention? We cut out the old, prepare the joints and apply the right sealant, and the work is guaranteed for a year.
- Hard, crazed mastic that has stopped moving
- Plants rooting in failed movement joints
- Rain getting behind render or cladding at a joint
Work for landlords, hotels and businesses
Letting agents and landlords in East Dean can book us as well as homeowners. Sealant work between tenants keeps a property looking cared for before the next move-in.
If you manage several properties in or around East Dean, jobs at different addresses can go on one quote. Send us the addresses and the work at each.
External mastic in East Dean, done properly
On houses, flats and commercial buildings across East Dean, we reseal joints in brickwork, render, cladding and façade panels. Every joint gets the same careful preparation: clean joint faces and the right depth. If you’re dealing with water getting into walls through failed joints and movement joints with cracked, split or missing sealant, we can help, whatever the surface.
Outside joints can only be sealed when they’re dry, so work in East Dean is booked around the forecast. Let us know about access to every wall, plus any garages or outbuildings.
A one-year guarantee comes with the work, just as it does everywhere we cover.
- Place
- East Dean (PO18)
- Wider area
- West Sussex
- Cover
- 12 months on all our work
- Quotes
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
What happens on the day
Before we leave, we go over the finished joints with you. The visit itself generally takes a few hours for a handful of joints, longer for a whole elevation, depending on how much there is to do. For a village or hamlet like East Dean, the journey is planned in advance: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- We start by walking round the building and agreeing the joints and the access.
- We cut out the old mastic and rake out anything in the joint.
- Joint faces are cleaned back and primed if the sealant needs it.
- Backing rod sized to the joint goes in to set the depth.
- The exterior sealant is applied, tooled and checked along its length.
Preparing for the visit
- Where the joints are inside, avoid wetting them before we arrive
- Clear the area around the work
- Mention any leaks or damp you’ve noticed
Ask for a quote
Getting a quote is simple: let us know the job and the location. A few photos by email make the job easier to understand.
Related advice
Quotes for external mastic in East Dean
Some jobs are bigger than they look, and some smaller. The main factors:
- When we can work, for business premises
- How much there is to do
- Whether there’s mould to deal with
- The number of rooms or windows
A few things move the cost up or down: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether the work is at height. We take all of that into account in your quote.
Asking for a quote
Photos help, but a description is a good start. Try to tell us:
- The rough size of the job
- The problem you’ve noticed
- Whether it’s a home or a business
- Any previous sealing or DIY work
We don’t publish a price list, because every job is different. Instead, your job gets its own clear quote. To get started, ring 0345 464 0079 or drop us an email.
Why deal with it now?
An open joint keeps letting water into the wall with every downpour. Wet masonry is more easily damaged by frost, so the damage spreads beyond the joint. Where a wall is exposed, as many are in small places like East Dean, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
Homes and businesses are quoted the same way: the amount of work, the access and the products needed, along with when we can work on site. Ask us for a quote and we’ll explain what it covers.
Why us?
- A 12-month guarantee on all work
- 4.9 on Google from 180+ five-star reviews
- Homes, businesses and hotels
- More than 20 years in sealant work
See our cost guide or customer reviews.
Common problems we fix in East Dean
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.
The most common problems we see are:
- Plants rooting in failed movement joints
- Rain getting behind render or cladding at a joint
- Joints with sealant missing in places
- Old sealant gone brittle and cracked
For an older house near a landmark such as The Parish Church of All Saints, 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
- What product goes in the joint
- What the cure time is
- How the joint is cleaned and prepared
East Dean: your questions answered
Is East Dean in your area for external mastic?
Yes, East Dean is within the area we cover. Our work covers London and the South East. Just phone 0345 464 0079 or send us an email with a few details of the job.
What guarantee comes with external mastic in East Dean?
All our work, in East Dean and everywhere else, comes with a 12-month guarantee. We are fully insured, and an ARBOMaster approved applicator.
How long does external mastic last?
That varies with the weather the wall faces, how much it moves and the sealant used. Sealant is a maintenance item, so check the joints once a year and renew it when it starts to fail.
Do you work at height?
It depends on the building. Where joints can be reached safely, we’ll do them. Give us some details and we will confirm the access.
What should I tell you?
Where the job is, what the problem is and roughly how big it is. Photos by email help too.
Can a movement joint be filled with mortar?
No. A mortar-filled joint can’t move, so the wall cracks somewhere else instead. Use a flexible sealant with backing rod.
How long before the joint can be used?
It depends on the product and the conditions. Before we leave, we’ll tell you the cure time.
Should I try DIY first?
It depends on the job. High-level, external movement and fire-rated joints are professional jobs, while a short indoor joint may be within reach.
What else we do in East Dean
What external mastic looks like in East Dean
Historic houses like West Dean House (about 2.6 miles west) are a reminder that the area around East Dean 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. 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.
Around East Dean, as everywhere, external mastic is only as good as the preparation behind it.
East Dean is about 6 miles north-east of Chichester, in West Sussex. Wherever you are in the PO18 postcode area, our applicators can take on external mastic. Our area takes in 371 places across West Sussex, large and small. We also work in Portsmouth, about 17 miles from East Dean.
Every address in PO18 is covered for external mastic, from the main roads to the quietest streets. If you need external mastic at a property on Main Road, Chapel Row and Charlton Road or anywhere close by, our applicators can take on the job. We also cover the places around East Dean: Charlton (1 mile west), Singleton (2 miles west), West Dean (3 miles west), Heyshott (3 miles north) and Cocking (3 miles north-west). Further out, we also cover Worthing (15 miles south-east), Bognor Regis (8 miles south), Chichester (6 miles south-west), Selsey (13 miles south), Littlehampton (11 miles south-east) and Emsworth (10 miles south-west).
Landmarks near East Dean
In East Dean, that means homes and buildings near The Star And Garter Public House and the streets around them. A little further out are Weald and Downland Gridshell (1.8 miles west) and Chichester Centre (5 miles south-west). Open spaces near East Dean include Graffham Common and Levin Down.
When it is not the sealant
Sealant isn’t the answer to every problem, and we’d rather say so up front. It won’t solve:
- Adding movement joints to masonry that has none
- Structural movement, which needs a surveyor or engineer
- Damp that is not coming from the joint
If you are not sure, just ring 0345 464 0079 or send us an email and we’ll give you a straight answer.
Surfaces we seal
- Brickwork movement joints
- Concrete & block
- Render & cladding joints
- Joints between brick and frames
- Façade panels
- Copings & trims
Aftercare tips
A little care helps the new joints last. Our advice:
- Make sure movement joints aren’t pointed over
- Keep soil, plants and ivy away from the joints
- Have failed joints looked at early
- Ask before painting over external sealant
Make sure anyone working on the wall later knows where the movement joints are. They should be kept open and resealed, not filled.
Gaps, plants or missing sealant in a joint are worth getting looked at. Earlier resealing means a smaller job and a better result.