East Sussex · England
External Mastic in Barcombe Cross
We cover Barcombe Cross for sealing brickwork movement joints, render, cladding and façade joints. Old material cut out, joints cleaned and sealed neatly and a 12-month guarantee.
- Joints pointed up with cement by mistake
- Joints with sealant missing in places
- Plants rooting in failed movement joints
What affects the quote in Barcombe Cross
Every job gets its own quote. These are the things that affect it:
- Whether old sealant or filler has to be cut out
- Any mould that needs treating
- Whether the work is at height
- The type of sealant required
Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed, plus any working-time requirements on site. Call for a quick quote and we will go through it with you.
What we need to know
You don’t need to know the technical terms. Just tell us:
- Whether it has been sealed before
- If it’s domestic, commercial or a hotel
- Roughly how big the job is
- What the problem is, such as mould, gaps, leaks or cracking
We quote each job on its own, so the first step is telling us about yours. Simply ring 0345 464 0079 or drop us an email and describe the job.
External mastic in Barcombe Cross
External mastic is a job where short cuts show quickly. New sealant over old, joints packed with mortar and beads with no backing all tend to fail early. We strip the joint back and start again. Typical jobs include movement joints with cracked, split or missing sealant and sealant that has lost its bond to the brick or render, across brickwork movement joints, render & cladding joints and concrete & block.
External sealant needs dry, clean surfaces, so work around Barcombe Cross is planned for dry weather. Tell us about access to all sides of the building, including outbuildings and garages.
You are covered for a year from the day we finish. If there’s a problem with it, please ring 0345 464 0079 or send us an email.
- Where
- Barcombe Cross (BN8)
- Region
- East Sussex
- Cover
- A year, on every job
- Quotes
- A clear quote up front
- Call
- 0345 464 0079
- Updated
- 26 October 2026
The process
All our tools and materials come with us in the van, so there’s nothing for you to buy. After a quick look at the joints together, we protect the area and start. Most jobs take anything from a few hours to several days, depending on the building. Somewhere as small as Barcombe Cross, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- We start by walking round the building and agreeing the joints and the access.
- Every bit of old sealant and any mortar or debris is cut out.
- 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
- Let us know about earlier repairs to the joints
- Mention any leaks or damp you’ve noticed
- For indoor joints, keep the area dry beforehand if you can
Get a quote
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is, and we will explain how we’d tackle it. Whenever you are ready, ring 0345 464 0079 or email us.
Advice
Barcombe Cross buildings and the weather
With historic houses such as Glyndebourne (about 3.7 miles south-east) nearby, there’s older building stock in the area around Barcombe Cross 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. The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Managing a site like Barcombe Church of England Primary School? Then larger buildings have long runs of movement joint that eventually need resealing. If you live in an older home near St Francis of Assisi, older walls, gutters and the joints where extensions meet them need a flexible sealant.
Barcombe Cross is about 3 miles north of Lewes, in East Sussex. If you need external mastic in Barcombe Cross, it’s easy to get a quote: please call 0345 464 0079 or send us an email. We cover East Sussex from our Crawley base. 289 places in East Sussex are on our list, from the larger towns to small villages. There’s also a page for Brighton, roughly 9 miles from Barcombe Cross.
Postcode districts we cover here for external mastic: BN8. That includes homes and businesses on High Street, Grange Road and Weald Close and the roads around them. Close by, we work in Barcombe (1 mile south), Mount Pleasant (1 mile north-east), Barcombe Mills (1 mile south-east), Upper Wellingham (2 miles south-east) and Cooksbridge (2 miles south-west). Larger places within reach include Eastbourne (15 miles south-east), Seaford (11 miles south), Lewes (3 miles south), Hailsham (11 miles east), Crowborough (11 miles north-east) and Uckfield (5 miles north-east).
Local landmarks in Barcombe Cross
Typical jobs here are in homes near Royal Oak pub and Chailey School and the streets around them. Barcombe Cross’s nearest station is Cooksbridge station, about 1.9 miles south-west. A little further out are Museum of Agricultural Bygones (3.7 miles south-east) and Lewes Victoria Hospital (3.6 miles south). The countryside around Barcombe Cross includes Malling Down and Offham Hill.
Honest limits
We will not take on work that won’t last, so these are the limits:
- Subsidence or other structural problems
- Walls that need new movement joints cut into them
- Failed render or damaged cladding panels
If in doubt, ring 0345 464 0079 or drop us an email and we’ll say what we think.
Surfaces we seal
- Brickwork movement joints
- Copings & trims
- Concrete & block
- Joints between brick and frames
- Render & cladding joints
- Façade panels
Can I do it myself?
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and does not move well, and the joint depth matters as much as the finish.
Sealing over old silicone is the commonest DIY error. Silicone does not stick to old silicone, so it lifts and traps water and mould underneath. Everything old must be removed first.
How to look after the new joints
After the cure time, these simple habits help:
- Point out the joints to other trades
- Wash walls gently around the sealant
- Keep movement joints as flexible joints, not mortar
- Check external joints each spring
Follow the cure time we give you before the joint is knocked or disturbed. Most exterior sealants skin fast but take longer to cure right through.
Leaks behind façade panels and render often go unseen. By the time there’s a damp patch, the damage can be well established, so it’s worth resealing at the first signs.
Why act early in Barcombe Cross
Water gets in through a failed movement joint, behind render and cladding. Resealing early keeps the job to the joint itself, rather than the wall around it. Where a wall is exposed, as many are in small places like Barcombe Cross, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
Instead of a standard rate, we look at what your job involves: the amount of work, the old material and the access. The price is agreed before we begin.
Why book with us
- You choose the colour before work begins
- Old sealant always removed completely
- 180+ five-star Google reviews
- ARBOMaster approved applicator
Take a look at our cost guide or our reviews.
Towns and villages near Barcombe Cross
What else we do in Barcombe Cross
Barcombe Cross: your questions answered
I let a flat near Cooksbridge station. Can you help?
Yes, landlords and agents are among the people we work for. You can phone 0345 464 0079 or drop us an email with the details for a clear quote.
Can you do external mastic in Barcombe Cross?
Yes. Our work covers London and the South East, and Barcombe Cross is part of that. Just call 0345 464 0079 or email us with a few details of the job, and we will give you a clear quote.
Can you reach joints on upper floors?
It depends on the building. Send us pictures and a rough idea of the height, and we’ll confirm what access is needed.
Do you take out the old sealant first?
Yes. All of the old material is cut out and the joint cleaned.
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, and reseal at that point.
What colours does the sealant come in?
The sealant colour is picked to suit the wall. There’s a wide choice of exterior colours.
Can you do several jobs on one visit?
Yes. Several rooms, windows or areas can go on one quote.
How long does the job take?
Most jobs take a few hours for a handful of joints, longer for a whole elevation, including preparation and clearing up. Your quote will say how long we expect yours to take.
Signs you need external mastic in Barcombe Cross
Sunlight, wet weather and frost wear exterior sealant down. Over the years it hardens, cracks on the surface and loses its give, so the next time the wall moves, it splits or pulls away.
Keep an eye out for any of the following:
- Sealant pulling away from one side of the joint
- Weeds or debris growing in open joints
- Rigid filler in a joint that should flex
- Water getting into walls through failed joints
For landlords with property near Cooksbridge station, outside joints that have cracked can let damp into a rental, so check them between lets.
What to look for in a quote
- How the joint is cleaned and prepared
- Whether you can choose the colour
- How long to leave it before use
- Whether all the old sealant comes out first