East Sussex · England
Upper Dicker External Mastic
Specialist external mastic for Upper Dicker: careful preparation, the right product and tidy work. Ask us for a quick quote.
- Water getting into walls through failed joints
- Movement joints with cracked, split or missing sealant
- Gaps where render, brick and frames meet
When to call us in Upper Dicker
Every building moves. Brickwork grows a little over the years, blockwork and concrete shrink, and all of it moves with heat and moisture. The sealant in the movement joints takes that strain.
Most people get in touch after spotting something like this:
- Rain getting behind render or cladding at a joint
- Old sealant gone brittle and cracked
- Movement joints filled with mortar instead of sealant
- Sealant that has lost its bond to the brick or render
In the older streets around Holy Trinity, older walls, gutters and the joints where extensions meet them need a flexible sealant.
Before booking anyone
- How long the guarantee is
- Whether they seal over old material or remove it
- What the cure time is
- Is VAT in the price?
About our external mastic in Upper Dicker
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 a rigid filler would soon crack. We work on concrete & block, copings & trims and joints between brick and frames, and common reasons people get in touch are joints pointed up with cement by mistake and cracked joints where brick meets render or frames.
Older homes in small places like Upper Dicker may be stone, brick or timber-framed, often with later extensions. The joints where those materials meet are the weak points, and they need the right sealant at the right depth.
There’s a 12-month guarantee on every job.
- Place
- Upper Dicker (BN27)
- Wider area
- East Sussex
- Guarantee
- 12 months on all our work
- Quotes
- A clear price before work begins
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Nearby places to Upper Dicker
What else we do in Upper Dicker
Keeping the joints in good condition
Good habits help new joints last longer. Our tips:
- Don’t let climbing plants root in the sealant
- Avoid pressure-washing directly into sealant joints
- Check external joints each spring
- Get split or bare joints resealed while the damage is small
Make sure anyone working on the wall later knows where the movement joints are. They should be kept open and resealed, not filled.
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.
Why deal with it now?
A low-modulus sealant is chosen because it moves without pulling hard at the edges. That protects surfaces like brick, render and concrete. Too stiff a sealant can pull at the edges and break them. Older cottages and farmhouses around Upper Dicker can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
Every job is a little different, so each one gets its own quote. Size, access and the product the joint needs all play a part, and we’ll explain the quote if you ask.
Why us?
- Sealant colour chosen to suit
- Arbo and Everbuild products
- White, clear, grey or coloured to suit, where the product allows
- Anti-fungal sanitary silicone in wet areas
Walls and rooflines in Upper Dicker
With historic houses such as Michelham Priory (about 0.6 miles south-east) nearby, there’s older building stock in the area around Upper Dicker as well as newer homes. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material. The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
If you look after a building such as Bede's Prep School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s. Rented homes near Berwick (Sussex) station change hands often, and split movement joints are easy to miss on a rental until damp shows inside.
Upper Dicker is about 2 miles west of Hailsham, in East Sussex. We carry out external mastic for householders, landlords and businesses in Upper Dicker. Across East Sussex, we cover 289 places, and Upper Dicker is one of them. For nearby work, see our Brighton page.
Here we cover the BN27 postcode area for external mastic. Streets in the area include Camberlot Road, Old Forge Close and Coldharbour Road, and we cover them all. We also cover the places around Upper Dicker: Lower Dicker (1 mile north-east), Tile Hurst (1 mile east), Lower Horsebridge (2 miles north-east), Nash Street (2 miles north) and Upper Horsebridge (2 miles east). Within a short drive, we also cover Eastbourne (7 miles south-east), Bexhill-on-Sea (12 miles east), Seaford (8 miles south-west), Lewes (9 miles west), Crowborough (13 miles north) and St Leonards (15 miles east).
Near you in Upper Dicker
In Upper Dicker, that means homes and buildings near The Plough Inn, Park Mead Primary School and Hailsham Community College and the streets around them. The closest station to Upper Dicker is Berwick (Sussex) station, about 2.5 miles south-west. Well-known places in the area include Agricultural Museum (3.6 miles south) and Hellingly Hospital Railway (2.8 miles north-east). For a walk, there’s Firle Beacon.
Upper Dicker questions
Is Upper Dicker in your area for external mastic?
Yes, Upper Dicker is within the area we cover. Our work covers London and the South East. Just call 0345 464 0079 or email us with a few details of the job.
I let a flat near Berwick (Sussex) station. Can you help?
Yes. We work for letting agents and landlords as well as homeowners. You can phone 0345 464 0079 or email us with the details for a clear quote.
Which products do you use?
We choose the sealant for the joint, not the other way round. Movement, water and weather all affect the choice.
How long does the job take?
As a guide, most jobs take a few hours for a handful of joints, longer for a whole elevation. Larger jobs naturally take longer.
How do you reach high-level joints?
That depends on how high the joints are and the ground below. Ground-floor joints are simple; for higher ones, send details and we will confirm the access.
Should I point up the gap in my brickwork?
No. A mortar-filled joint cannot move, so the wall cracks somewhere else instead. Use a flexible sealant with backing rod.
Will you leave a mess?
Tidy work is part of the job. Nearby surfaces are protected.
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.
What we do, step by step
When we arrive, we start by going over the job with you, so there are no surprises. We protect the surfaces around the joints before any work begins. The work normally takes a few hours to a few days, depending on the length of joint and the access. Somewhere like Upper Dicker needs a little journey planning: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- Each joint is checked and the colour of the new sealant agreed.
- Failed sealant is removed back to clean, sound faces.
- Backing rod goes in so the sealant can stretch between the two faces.
- Primer is applied wherever the sealant needs it.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Getting ready for the visit
- Mention if the joints have been sealed before
- For indoor joints, keep the area dry beforehand if you can
- Keep children and pets away from the work area
How to get a quote
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is. Whenever you’re ready, phone 0345 464 0079 or send us an email.
Advice
For landlords and businesses
Landlords and letting agents in Upper Dicker can book us as well as homeowners. Resealing between tenancies keeps a property looking cared for.
From a single let to a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a one-year guarantee.
How the job changes by surface
Joints between dissimilar materials
Brick against render, concrete against metal, stone against timber: every change of material is a joint. A flexible sealant bridges the two so the movement is taken up.
Brickwork movement joints
Brick movement joints are often mistaken for a missing mortar line. If that’s happened, we rake it out and reseal it properly.
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.
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.