Brighton and Hove · England
Prestonville External Mastic
Problem with your movement joints in Prestonville? We remove the old material, prepare the joints and seal them properly, with a 12-month guarantee.
- Rain getting behind render or cladding at a joint
- Leaking joints around cladding and façade panels
- Joints pointed up with cement by mistake
Leave it or put it right?
Water gets in through a failed movement joint, behind render and cladding. Dealing with it early keeps the repair to the joint, rather than the wall around it. Around Prestonville, water from a failed joint in an older home can soak into timber and plaster, and that’s a much bigger job than renewing the sealant.
Rather than a set price list, we price the job in front of us: the amount of work, the old material and the access. You’ll know the price before we begin.
Why us?
- Experience in homes, commercial sites and hotels
- Colour agreed with you before work begins
- 4.9 on Google from 180+ five-star reviews
- Anti-fungal silicone where joints get wet
See how sealant jobs are priced and our reviews.
How we handle external mastic in Prestonville
A movement joint is only as good as its depth. Closed-cell backing rod sets the depth and stops the sealant sticking to the back, leaving it bonded to two faces so it can move with the wall. Typical jobs include sealant pulling away from one side of the joint and movement joints filled with mortar instead of sealant, across render & cladding joints, joints between brick and frames and copings & trims.
In and around Prestonville, older properties sit alongside newer ones, each with its own outside joints. Older gutters and trims need their joints resealed; newer brick and render need their movement joints kept sound.
A 12-month guarantee comes with the work, just as it does everywhere we cover.
- Location
- Prestonville (BN1, BN3, BN88)
- Wider area
- Brighton and Hove
- Cover
- 12 months on all our work
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Prestonville buildings and the weather
Prestonville is within about 1 mile of 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. With historic houses such as Preston Manor & Gardens (about 0.4 miles north) nearby, there’s older building stock in the area around Prestonville as well as newer homes. Where a home is older, older brick and stone need a sealant that suits them, at the right joint depth.
For site and facilities teams at buildings such as Stanford Infant School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s. In the older streets around St Luke's Church Prestonville, older walls, gutters and the joints where extensions meet them need a flexible sealant.
Prestonville is about 1 mile west of Brighton, in Brighton and Hove. Prestonville gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a 12-month guarantee. Prestonville is one of 30 towns and villages in Brighton and Hove we cover for external mastic.
Postcode districts we cover here for external mastic: BN1, BN3 and BN88. Whether your property is on Dyke Road, Home Road and Lloyd Road or a nearby road, our applicators can take on the job. You’ll find Prestonville on the A23, which makes it straightforward to reach. We also cover the places around Prestonville: Seven Dials (1 mile south), Preston (1 mile north), West Hill (1 mile south-east), Brunswick (1 mile south) and Withdean (1 mile north). We also work in nearby towns such as Saltdean (5 miles south-east), East Saltdean (6 miles south-east), Roedean (3 miles south-east), Rottingdean (4 miles east) and Ovingdean (4 miles south-east).
Around Prestonville
We work in homes and buildings around Preston Park, The Drive Prep School and Milligan House and the streets around them. Prestonville’s nearest station is Preston Park station, about 0.6 miles north. Nearby you will also find Clayton Castle (5 miles north) and Churchill Square (1 mile south). The countryside around Prestonville includes Whitehawk Hill and Newmarket Hill.
What else we do in Prestonville
How to look after the new joints
To keep the joints looking good and working properly:
- Leave the joints unpainted unless we’ve said otherwise
- Clear growth from the base of walls and joints
- Keep water from gutters off the wall
- Never let anyone fill a movement joint with mortar
Do not paint over the new sealant unless we’ve said the product is paintable. Paint can crack on a flexible joint, and paint can crack as the joint moves.
Act while the splits are small. At that stage it’s a simple cut out and reseal.
FAQs for Prestonville
Does living near the coast affect external mastic in Prestonville?
Near the coast, wind-driven rain and, nearer the shore, salt air make outside sealant work harder. The right product, a clean joint and the right depth all help it cope.
Can you help a landlord with a rental near Preston Park station?
Yes, landlords and agents are among the people we work for. You can ring 0345 464 0079 or email us with the details for a clear quote.
Do you work for hotels and businesses?
Yes. Commercial and hotel work is a large part of what we do. Working times can be discussed when we quote.
Do you cover Prestonville?
Yes. We cover Prestonville and the rest of Brighton and Hove, as part of our work across South East England, London and Scotland. To book, ring 0345 464 0079 or email us.
Is it messy?
Very little: the area around the joints is protected first, and we clear up the old sealant and our materials before we leave.
Can you seal joints between render and window frames?
Yes. Joints between dissimilar materials are a big part of external work. The sealant is chosen to bond to both sides with primer where required.
How often do external joints need resealing?
It varies with how exposed the wall is and how much the joint moves. Signs to watch for are cracking, hardening and gaps at the edges.
What’s an expansion joint in brickwork?
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.
What we’re called out for in Prestonville
Every building moves. Clay bricks expand slightly over their life, concrete and block shrink, and everything moves with temperature and wet. All of that ends up in the joint sealant.
The most common problems we see are:
- Panel joints letting water in
- Joints with sealant missing in places
- Weeds or debris growing in open joints
- Joints pointed up with cement by mistake
If you let a flat or house near Preston Park station, failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Questions to ask before booking
- Whether they seal over old material or remove it
- How long to leave it before use
- What insurance they hold
- Is VAT in the price?
How it works
A visit follows a simple pattern: we look at the joints together, protect the area around them, do the work and tidy away. It generally takes a few hours to a few days, depending on the length of joint and the access. A visit to Prestonville is planned like any other: the time, the access and where to park are agreed in advance. If the work is outside, the weather plays a part, as sealant needs a dry surface.
- 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.
- 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
- Where the joints are inside, avoid wetting them before we arrive
- Keep children and pets away from the work area
- Let us know about stairs, lifts or work at height
Getting a quote
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is, and we’ll talk you through what we’d do. When it suits you, ring 0345 464 0079 or send us an email.
Advice
When something else is needed
Sealant is not the answer to every problem, and we will tell you before any work starts. Sealant won’t put right:
- Cutting new joints into brickwork, which is building work rather than sealant work
- Structural movement, which needs a surveyor or engineer
- Loose or hollow render, which needs re-rendering
If you are not sure, just call 0345 464 0079 or email us and we will give you a straight answer before booking.
What we seal
- Brickwork movement joints
- Façade panels
- Render & cladding joints
- Copings & trims
- Joints between brick and frames
- Concrete & block
Should I try it myself first?
The biggest DIY mistake is sealing over old sealant. Silicone doesn’t stick to old silicone, so it lifts and traps water and mould underneath. All the old material has to come out first.
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions.
Different surfaces, different methods
Concrete and blockwork
Wide joints in concrete need the depth controlling carefully. Backing rod sized to the joint sets it and keep the sealant to the right depth.
Cladding and façade panels
If the façade has a specified sealant, that is what we use. Send us any details you have about the façade.