Brighton and Hove · England
External Mastic in East Saltdean
Movement joints in East Saltdean need attention? We remove the old material, prepare the joints and seal them properly.
- Weathered mastic that no longer stretches
- Damp patches traced to an open external joint
- Joints with sealant missing in places
About our external mastic in East Saltdean
We cut out failed sealant, set the joint depth with closed-cell backing rod and reseal with a low-modulus exterior sealant. We pick a colour that sits well with the wall so the joint does not stand out. We are often asked to deal with rain getting behind render or cladding at a joint and leaking joints around cladding and façade panels, across copings & trims, render & cladding joints and façade panels.
Around East Saltdean, garages, outbuildings and extensions all add to the joints on the outside of a home. Leaks normally start at a gutter end, a garage door frame or where an extension meets the house.
Whatever the size of the job, it’s backed by our one-year guarantee.
- Location
- East Saltdean (BN2)
- Region
- Brighton and Hove
- Cover
- 12 months on all our work
- Quote
- A clear price before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Leave it or put it right?
Done well, a resealed joint is a neat, straight line that suits the wall. A rushed bead with no backing looks untidy and does not last so it’s worth doing right. In a smaller place like East Saltdean, wherever a wall is exposed, a failed outside joint is a real source of damp. Indoors, a failed seal lets water into floors and panels as it would anywhere.
What it costs depends on the size of the job, how hard the old material is to remove and how easy the joints are to reach. You will have a clear quote before any work starts.
What you get with us
- Experience in homes, commercial sites and hotels
- Sealant colour chosen to suit
- We leave the area clean and tidy
- You choose the colour before work begins
See our cost guide and what customers say.
East Saltdean: your questions answered
Do you work for landlords with property near Southease station?
Yes, rental work is part of what we do. You can call 0345 464 0079 or send us an email with the address and a few details, and we will give you a fixed price before we start.
Does living near the coast affect external mastic in East Saltdean?
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 new sealant go over the old?
No, because it fails. We remove every bit of old sealant first.
Why is there a gap in my brick wall?
Walls move with heat, cold and moisture, so long walls have planned gaps to take that movement. The gap is sealed with a flexible sealant over backing rod.
Where is Mr Mastic based?
Our base is in Crawley, and we cover South East England, London and all of Scotland.
Is it OK to fill a movement joint with cement?
No, not where the gap is a movement joint. Pointing it stops it working and can lead to cracking. A flexible sealant is the right fill.
When is the sealant fully cured?
Many sealants skin over quickly but take longer to cure fully. We will tell you how long to leave the joint before we leave.
What does external mastic cost?
We don’t publish prices, because the cost depends on the job: how much there is, what’s there now, how we reach it and what it needs. We agree the price before any work begins.
How the visit works
When we get to you, we check the joints match what you told us. If anything is different, we explain it before carrying on. Most jobs then take a few hours to a few days, depending on the length of joint and the access. In a smaller place like East Saltdean, parking is seldom the issue; lanes, gates and long drives are worth mentioning. If the job is outside, tell us about side access and how high the joints are.
- 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.
- We gun in low-modulus sealant and tool it neatly.
How to prepare
- Let us know about stairs, lifts or work at height
- Mention any sign-in or site rules at work premises
- Plan for the work area to be out of bounds to pets and children
How to get a quote
Every job is quoted individually, so the first step is telling us about yours. Simply ring 0345 464 0079 or send us an email and describe the job.
Related advice
DIY sealant or a professional job?
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions.
If you’ve already had a go yourself, that’s fine. We cut it out and start again.
Outside joints around East Saltdean
East Saltdean 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. Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Managing a site like Saltdean Primary School? Then its movement joints, gutters and trims need looking after like any other building’s. Homes close to St Nicholas include some older properties, and old and new materials meet at the roofline and walls, which is where sealant earns its keep. For landlords with property near Southease station, failed wall and movement joints let damp in, so they’re worth checking between tenancies.
East Saltdean is about 4 miles west of Newhaven, in Brighton and Hove. From the centre of East Saltdean to the outskirts, external mastic is available for homes and businesses alike, from flats and houses to offices and hotels. We cover 30 towns and villages across Brighton and Hove, large and small.
We work across the BN2 postcode area for external mastic. We cover properties on Wicklands Avenue, Oaklands Avenue and Brambletyne Avenue and the roads around them. If you’re just outside East Saltdean, we cover Saltdean (1 mile west), Telscombe (1 mile east), Rottingdean (2 miles north-west), Ovingdean (2 miles north-west) and Rodmell (3 miles north-east). Further out, we also cover Brighton (5 miles north-west), Brighton and Hove (7 miles west), Hove (7 miles west), Carlton Hill (5 miles west), Hanover (5 miles north-west) and West Hill (5 miles west).
Local landmarks in East Saltdean
Typical jobs here are in homes near Beacon Hill, Smugglers Rest pub and Peacehaven Community School and the streets around them. East Saltdean’s nearest station is Southease station, roughly 3.3 miles north-east of the centre. A little further out are French Convalescent Home (3.5 miles west) and Planet Earth Museum (3.7 miles east). Green spaces nearby include Newmarket Hill and Beacon Hill Local Nature Reserve.
Also near East Saltdean
More services for East Saltdean
When something else is needed
We’d rather tell you now than do work that won’t last, so here’s what sealant cannot put right:
- Structural movement, which needs a surveyor or engineer
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
- Render that is blown, hollow or coming away
Not sure which it is? You can phone 0345 464 0079 or send us an email and we’ll tell you honestly before booking.
Joints and surfaces we work on
- Render & cladding joints
- Brickwork movement joints
- Concrete & block
- Façade panels
- Copings & trims
- Joints between brick and frames
Looking after it afterwards
Simple care keeps the joints in good condition. We recommend:
- Fix overflowing gutters above sealed joints
- Check external joints each spring
- Get split or bare joints resealed while the damage is small
- Tell anyone working on the walls about the movement joints
Follow the cure time we give you before the joint is knocked or disturbed. The surface skins over quickly, but full cure takes longer.
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.
For landlords and businesses
A neglected joint can let water reach the structure, which matters even more when someone else lives there. Resealing at the right time is simple maintenance.
If you manage several properties in or around East Saltdean, several properties can go on one quote. Just tell us the addresses and what each one needs, and photos by email help.
How we quote for external mastic
Jobs vary more than people expect. What affects the quote:
- Mould in or behind the old joints
- Whether old sealant or filler has to be cut out
- Working hours on commercial sites
- How easy the joints are to reach
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, any mould to treat, and whether we need extra access for height. We take all of that into account in your quote.
What we need to know
When you call or email, it’s useful to know:
- The type of property
- Access, such as stairs, a lift or height
- If someone has resealed it before
- Where the property is
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.