West Sussex · England
External & façade joints in Colworth, West Sussex
External mastic for Colworth and the surrounding area: careful preparation, the right product and tidy work. Call for a quick quote.
- Movement joints filled with mortar instead of sealant
- Sealant that has lost its bond to the brick or render
- Failed seals between different materials
Looking after it afterwards
Joint life depends on how it’s used and looked after. We suggest:
- Point out the joints to other trades
- Leave the joints unpainted unless we’ve said otherwise
- Get split or bare joints resealed while the damage is small
- Don’t let climbing plants root in the sealant
Make sure anyone working on the wall later knows where the movement joints are. They must stay as flexible joints, never rendered or pointed over.
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.
About our external mastic in Colworth
We cut out failed sealant, set the joint depth with closed-cell backing rod and reseal with a low-modulus exterior sealant. The colour is chosen to suit the brick or render. If you have damp patches traced to an open external joint and weathered mastic that no longer stretches, we can put it right, whatever the surface.
Around Colworth, older buildings can be stone, brick or timber-framed, many with extensions added later. The joints where those materials meet are the weak points.
Each job carries a 12-month guarantee.
- Where
- Colworth (PO20)
- Region
- West Sussex
- Cover
- A year, on every job
- Price
- A clear price before we start
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Do you need external mastic in Colworth?
The wrong product in a moving joint is a classic cause. A high-modulus or general-purpose sealant can be too rigid for a busy joint, so it pulls away from the edges.
People generally contact us when they notice something like this:
- Cracked joints where brick meets render or frames
- Sealant that has lost its bond to the brick or render
- Weeds or debris growing in open joints
- Joints with sealant missing in places
Goodwood House, about 4 miles north-west, is one of the historic houses in the wider area around Colworth.
Questions to ask before you book
- When the joint can take water or movement
- What product goes in the joint
- What preparation is included
- Is the old sealant removed completely?
Landlord and commercial work in Colworth
We regularly work with letting and managing agents. Tell us the address, the job and how access works and we’ll quote.
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
How the job changes by surface
Cladding and façade panels
Where a cladding system has its own specified sealant, we follow it. Send us any details you have about the façade.
Copings and trims
Metal and stone copings both move with temperature, so a flexible sealant suits them best in all weathers.
Also in Colworth
How it works
You do not need to clear the whole room or building before we come, only the area right around the joints. Everything nearby is protected, and the job takes anything from a few hours to several days, depending on the building in most cases. For a village or hamlet like Colworth, 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 inspect the joints and agree which need resealing and how they’ll be reached.
- The old mastic and anything lodged in the joint is removed.
- The joint faces are cleaned and primed where the sealant needs it.
- Closed-cell backing rod is fitted to set the depth and stop three-sided bonding.
- A flexible exterior sealant is applied and tooled in a colour to suit the wall.
Before we arrive
- Mention any parking rules near the property
- Where the joints are inside, avoid wetting them before we arrive
- Let us know if you’ve seen damp or leaks
Getting a quote
Getting a quote is simple: let us know the job and the location and its rough size. A few photos by email make the job easier to understand, and we’ll take it from there.
Related advice
What affects the quote in Colworth
Call for a quick quote. What matters most is:
- Access and height
- Any working-time requirements on site
- The product the joint needs
- The old material and how stubborn it is
Rather than a set price list, we look at what your job involves: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
What we need to know
You don’t need to know the technical terms. It helps if you can tell us:
- If someone has resealed it before
- A few pictures by email, if you can
- Whether it’s a home or a business
- Access, such as stairs, a lift or height
Want a quote for external mastic? Please ring 0345 464 0079 or email us and tell us about the job. You’ll know what we plan to do, and what it will cost, before any work begins.
What external mastic looks like in Colworth
Colworth is close to 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. Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Letting a property close to Bognor Regis station? Then outside joints that have cracked can let damp into a rental, so check them between lets. Schools such as Bartons Primary School are buildings too, and its movement joints, gutters and trims need looking after like any other building’s.
Colworth is about 2 miles north of Bognor Regis, in West Sussex. Anywhere in PO20, we can carry out external mastic at your property. 371 places in West Sussex are on our list. We also work in Portsmouth, about 16 miles from Colworth.
Here we cover the PO20 postcode area for external mastic. If you are just outside Colworth, we cover Merston (1 mile west), Oving (2 miles north-west), Lagness (2 miles south-west), Runcton (2 miles west) and Shopwyke (2 miles north-west). Further out, we also cover Worthing (13 miles east), Chichester (4 miles north-west), Selsey (7 miles south-west), Littlehampton (8 miles east), Emsworth (10 miles west) and Rustington (9 miles east).
What’s near Colworth
We work in homes and buildings around The Regis School and The Brooks Local Nature Reserve, among other places. The closest station to Colworth is Bognor Regis station, about 2.5 miles south-east. Nearby you will also find Bognor Regis Museum (2.7 miles south-east) and Tote Copse Castle (1.3 miles north-east).
Your questions about external mastic in Colworth
Can you help a landlord with a rental near Bognor Regis station?
Yes, we work for landlords and letting agents. Just phone 0345 464 0079 or drop us an email and tell us about the property, and we will give you a clear price.
Does living near the coast affect external mastic in Colworth?
Near the sea, outside joints face more wind, rain and salt than they would inland, so the choice of sealant and the preparation matter even more. It’s worth checking the walls that face the sea first.
Do you seal joints where cladding meets other materials?
Yes. Different materials move at different rates, so the joint between them must be flexible. The sealant is matched to both sides.
Are you an approved applicator?
Yes. ARBOMaster is the approved applicator scheme for Arbo sealants, and we’re part of it.
Will the old sealant be removed?
Always. Sealing over the old bead is the commonest cause of early failure, and it’s something we never do.
When will the joints need doing again?
It varies from wall to wall: joints on exposed walls or with a lot of movement age sooner. A yearly look will tell you when they need doing. Our work comes with a 12-month guarantee.
Which products do you use?
We choose the sealant for the joint, not the other way round. Where it moves, gets wet or faces the weather makes a difference, and we will tell you what we are using.
Do you work at height?
That depends on how high the joints are and the ground below. Ground-floor joints are simple; for higher work, tell us about the building and we’ll confirm what’s needed.
When something else is needed
We’d rather tell you now than do work that won’t last, so these are the limits:
- Cutting new joints into brickwork, which is building work rather than sealant work
- Cracked brickwork or render that needs a builder or plasterer
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
If in doubt, phone 0345 464 0079 or drop us an email and we will say what we think before you book.
Where we work in Colworth
- Façade panels
- Concrete & block
- Copings & trims
- Brickwork movement joints
- Render & cladding joints
- Joints between brick and frames