West Sussex · England
External Mastic in Cote
Our applicators work in Cote on sealing brickwork movement joints, render, cladding and façade joints. Old material cut out, joints cleaned and sealed neatly and every job guaranteed for a year.
- Failed sealant between panels on a façade
- Rain getting behind render or cladding at a joint
- Movement joints with cracked, split or missing sealant
External mastic in Cote
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 mortar or filler would crack. We work on copings & trims, render & cladding joints and façade panels, and people most often call us about sealant that has lost its bond to the brick or render and rain getting behind render or cladding at a joint.
Somewhere as small as Cote, homes and farm buildings often face open ground, where walls and rooflines take the weather head on. Gutter joints and wall joints there need a sealant that can flex and stay put.
The work is covered for a year after we finish. If anything isn’t right with it, call 0345 464 0079 or send us an email.
- Where
- Cote (BN13)
- Wider area
- West Sussex
- Cover
- 12 months on all our work
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Why act early in Cote
The longer a joint stays open, the more water the wall takes in. In cold weather, frost can damage wet brick and render, so the problem grows beyond the joint itself. Where a wall is exposed, as many are in small places like Cote, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
Doing several joints on one visit normally makes better use of the time than several visits. You will get one clear quote for the whole job.
Why us?
- Neat joints and a tidy finish
- 180+ five-star Google reviews
- Experience in homes, commercial sites and hotels
- Fully insured
Honest limits
In fairness, some problems need a different trade:
- Subsidence or other structural problems
- Render that is blown, hollow or coming away
- Cutting new joints into brickwork, which is building work rather than sealant work
If you’re not sure, just call 0345 464 0079 or send us an email and we will give you a straight answer.
What we seal
- Brickwork movement joints
- Copings & trims
- Render & cladding joints
- Concrete & block
- Joints between brick and frames
- Façade panels
How to look after the new joints
A little care helps the new joints last. Our advice:
- Get split or bare joints resealed while the damage is small
- Check the sealant is paintable before painting near it
- Look over the joints every year, ideally after winter
- Avoid pressure-washing directly into sealant joints
Make sure anyone working on the wall later knows where the movement joints are. They should be kept open and resealed, not filled.
An open movement joint lets rain into the wall every time it pours. Over time it can mean damp inside, stained render or frost-damaged brick, all bigger jobs than a reseal.
Also in Cote
Cote: your questions answered
Can you help a landlord with a rental near Durrington-On-Sea station?
Yes, we work for landlords and letting agents. Just call 0345 464 0079 or email us and tell us about the property, and we’ll give you a clear price.
Will you come out to Cote?
Yes, we do. Our work covers London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
How long before the joint can be used?
Most sealants are touch-dry well before they’re fully cured. We will give you the cure time for the product we used.
Do you guarantee your work?
Yes. There’s a 12-month guarantee on every job.
What is a movement joint?
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 often do external joints need resealing?
There’s no fixed answer: joints on exposed walls or with a lot of movement age sooner. Check them each year and reseal when they split or harden. Our work comes with a 12-month guarantee.
Can I do it myself?
You can, for simple jobs. The key is preparation: remove all the old material and work on a clean, dry joint. We can always put it right if it fails.
Do you take out the old sealant first?
Yes. We cut out all the old sealant and clean the joint before applying anything new.
DIY sealant or a professional job?
A DIY attempt does not rule out a professional job. We remove it and do the joint properly.
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.
What affects the cost of external mastic
You will get a clear quote before work begins. It’s based on:
- Any mould that needs treating
- The type of sealant required
- How much there is to do
- Any working-time requirements on site
The cost reflects the work involved, not guesswork. That’s why we ask a few questions first.
What we need to know
When you contact us, these details help:
- Any access issues, like height or stairs
- The rough size of the job
- What the problem is, such as mould, gaps, leaks or cracking
- The type of property
There’s no standard price list, as no two jobs are quite the same. Instead, we send you a clear quote for your job. To get started, ring 0345 464 0079 or drop us an email.
What we’re called out for in Cote
Weeds, moss and debris in a joint are a sign the sealant has gone. Roots and dirt hold water against the wall.
The most common problems we see are:
- Failed sealant between panels on a façade
- Joints pointed up with cement by mistake
- Damp patches traced to an open external joint
- Weathered mastic that no longer stretches
Letting a property close to Durrington-On-Sea station? Then split movement joints are easy to miss on a rental until damp shows inside.
Questions to ask before you book
- How long the guarantee is
- Whether the sealant suits the joint
- Are they insured?
- How the surfaces are prepared before sealing
Cote buildings and the weather
Cote is within about 3 miles of the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. Both are hard on movement joints and outside wall joints, which can dry out and crack sooner where a building faces the weather. Historic houses like Ecclesden Manor (about 2.5 miles south-west) are a reminder that the area around Cote has older buildings as well as new. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material.
Schools such as Durrington Junior School are buildings too, and movement joints, cladding joints and gutters on larger buildings need the same care as a house’s. Homes close to St Symphorian's Church include some older properties, and older walls, gutters and the joints where extensions meet them need a flexible sealant.
Cote is about 2 miles north-west of Worthing, in West Sussex. Whether you are in the middle of Cote or further out, external mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Our area takes in 371 places across West Sussex, from the larger towns to small villages. Our Brighton page covers work nearby, about 13 miles away.
Jobs for external mastic in BN13 is quoted and booked the same way as anywhere else. Other places close to Cote include Durrington (1 mile south-east), High Salvington (1 mile north-east), Clapham (1 mile west), Patching (2 miles west) and Findon (2 miles north). Further out, we also cover Bognor Regis (12 miles west), Burgess Hill (15 miles north-east), Littlehampton (5 miles south-west), Shoreham-by-Sea (7 miles east), Lancing (4 miles east) and Rustington (4 miles south-west).
What’s near Cote
Around Cote, our work takes us to homes and buildings near Durrington High School, Clapham Wood and Palatine Primary School and the streets around them. Cote’s nearest station is Durrington-On-Sea station, about 1.8 miles south of the centre. A little further out are The Acre (2.8 miles south-east) and Old Castle (1.7 miles south-east). Green spaces nearby include Highdown Hill.
The process
You don’t need to clear the whole room or building, just the space around the work. Everything nearby is protected, and the job takes a few hours to a few days, depending on the length of joint and the access in most cases. For a village or hamlet like Cote, 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.
- We look at every joint and agree a colour to suit the wall.
- Failed sealant is removed back to clean, sound faces.
- Backing rod goes in so the sealant can stretch between the two faces.
- We prime the faces where required.
- We gun in low-modulus sealant and tool it neatly.
How to prepare
- Tell us if parking is tricky
- Plan for the work area to be out of bounds to pets and children
- For indoor joints, keep the area dry beforehand if you can
How to get a quote
For external mastic in Cote, ring 0345 464 0079 or send us an email. Tell us what the problem is and where, and we’ll agree the price before any work begins.