East Sussex · England
External & façade joints in South Street, East Sussex
Problem with your movement joints in South Street? We remove the old material, prepare the joints and seal them properly, and the work is guaranteed for a year.
- Water getting into walls through failed joints
- Weathered mastic that no longer stretches
- Panel joints letting water in
South Street questions
I let a flat near Plumpton station. Can you help?
Yes, rental work is part of what we do. You can call 0345 464 0079 or drop us an email with the address and a few details, and we will give you a fixed price before work begins.
Is South Street in your area for external mastic?
Yes, South Street is within the area we cover. We work across London and the South East. You can call 0345 464 0079 or email us and let us know what needs doing.
What colours does the sealant come in?
We choose a sealant colour to suit the brick, stone or render so the joint blends in. Exterior sealants come in a good range of colours.
Will it make a mess?
Very little: the area around the joints is protected first, and we tidy up before we go.
Can I do it myself?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. Most DIY failures come from sealing over old material, wet joints or too much sealant.
What is backing rod for?
The foam is closed-cell backing rod. It keeps the sealant at the right depth and bonded to the sides only so it can flex with the joint.
Do you work at height?
It depends on the building. We work on joints that can be reached safely. Tell us about the building and we will confirm what access is needed.
Why is there a gap in my brick wall?
Brickwork, render and cladding all move a little, and planned joints take up that movement. It’s closed with backing rod and a flexible sealant.
How we handle external mastic in South Street
For buildings in South Street, we reseal external joints of all kinds, from brick movement joints to cladding panels. Every joint gets the same careful preparation: clean joint faces and the right depth. We are often asked to deal with panel joints letting water in and gaps where render, brick and frames meet, across render & cladding joints, concrete & block and brickwork movement joints.
External sealant needs dry, clean surfaces, so work around South Street is planned for dry weather. Let us know about access to every wall, plus any garages or outbuildings.
You’re covered for a year from the day we finish. If there’s a problem with it, please call 0345 464 0079 or send us an email.
- Where
- South Street (BN8)
- Wider area
- East Sussex
- Cover
- 12 months on all our work
- Quotes
- Quoted before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Should I try it myself first?
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it does not work out, we can still put it right.
Also near South Street
What else we do in South Street
Why deal with it now?
Resealing a run of joints in one go is generally better than patching one at a time. Joints of the same age tend to fail together and it means sorting access once. In a small place like South Street, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
The cost depends on how much there is to do, how hard the old material is to remove and access to the work. You’ll have a clear quote before any work starts, so you know where you stand.
Why South Street clients choose us
- ARBOMaster approved applicator
- Neat joints and a tidy finish
- We agree the colour with you first
- White, clear, grey or coloured to suit, where the product allows
See our cost guide or what customers say.
What we cannot put right
We won’t take on work that won’t last, so here’s what sealant can’t put right:
- Adding movement joints to masonry that has none
- Structural movement, which needs a surveyor or engineer
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
If you’re not sure, just ring 0345 464 0079 or email us and we’ll give you a straight answer.
Where we work in South Street
- Joints between brick and frames
- Copings & trims
- Façade panels
- Brickwork movement joints
- Concrete & block
- Render & cladding joints
How to look after the new joints
After the cure time, these simple habits help:
- Deal with leaking gutters that soak the joints below
- Show decorators and builders where the movement joints are
- Keep high-pressure jets off the joints
- Look over the joints every year, ideally after winter
Do not let soil, plants or ivy build up against the new joints. Damp material against the sealant shortens its life.
Once a joint can’t move, the wall finds another way, normally as cracking in the brickwork or render nearby. Resealing it early helps prevent that.
The process
When we arrive, we look over the joints with you first. Surfaces next to the work are protected before work begins. Most jobs take anything from a few hours to several days, depending on the building. For a village or hamlet like South Street, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided 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.
- We fit closed-cell backing rod to control the depth.
- The exterior sealant is applied, tooled and checked along its length.
Before we arrive
- Tell us about any water getting in
- Keep pets and children clear of the area while we work
- Tell us about access, such as stairs, a lift or high-level joints
Get a quote
We quote each job on its own, so start by telling us what you need. Just phone 0345 464 0079 or email us with the details.
Read more
South Street buildings and the weather
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 let a flat or house near Plumpton station, outside joints that have cracked can let damp into a rental, so check them between lets. If you live in an older home near The Parish Church of St Peter, older walls, gutters and the joints where extensions meet them need a flexible sealant.
South Street is about 5 miles east of Burgess Hill, in East Sussex. Jobs in South Street get the same care as everywhere else we work: the old material taken out, joints prepared properly and a 12-month guarantee. South Street is one of 289 places in East Sussex we cover for external mastic. You can also see our page for Brighton, roughly 9 miles from South Street.
Jobs for external mastic in BN8 is quoted and booked the same way as anywhere else. Local streets include Green Lane, Markstakes Corner and St James Walk, all of which we cover. If you’re just outside South Street, we cover South Chailey (1 mile south), Chailey (1 mile north-east), North Chailey (2 miles north), Chiltington (2 miles south) and Plumpton Green (2 miles south-west). Within a short drive, we also cover Seaford (13 miles south-east), Lewes (5 miles south), Hailsham (13 miles south-east), Crowborough (11 miles north-east), Uckfield (5 miles east) and Newhaven (11 miles south).
Around South Street
Locally, jobs take us to homes and businesses close to The Five Bells Inn and Chailey St Peter's Church of England Primary School, among other places. For rail, the closest station is Plumpton station, about 2.2 miles south-west. Well-known places in the area include Princess Royal Hospital (4.3 miles north-west). Not far away are Blackcap and Malling Down.
When to call us in South Street
Weeds, moss and debris in a joint are a sign the sealant has gone. Dirt and roots then trap moisture in the joint and make things worse.
These are the problems we’re asked about most:
- Panel joints letting water in
- Movement joints with cracked, split or missing sealant
- Sealant that has lost its bond to the brick or render
- Weathered mastic that no longer stretches
Managing a site like Chailey School? Then its movement joints, gutters and trims need looking after like any other building’s.
What your quote should include
- How hidden problems are handled
- Which sealant they’ll use, and why
- When the joint can take water or movement
- Is the old sealant removed completely?
What affects the quote in South Street
Every job gets its own quote. These are the things that affect it:
- Whether the work is at height
- Any working-time requirements on site
- Whether there’s mould to deal with
- The type of sealant required
What you pay reflects the work, not a rough estimate. That’s why we ask about the job first.
What to tell us for a quote
Photos help, but a description is a good start. Please mention:
- What the problem is, such as mould, gaps, leaks or cracking
- The type of property
- The rough size of the job
- Any previous sealing or DIY work
Call for a quick quote, or email us if that’s easier. Describe what needs sealing and we will talk you through the work and send you a clear quote.