West Sussex · England
Chidham External Mastic
External mastic across Chidham and nearby, with old sealant always removed completely and a one-year guarantee.
- Failed seals between different materials
- Damp patches traced to an open external joint
- Weathered mastic that no longer stretches
How we handle external mastic in Chidham
Ground-floor and low-level joints are straightforward to reach. Where joints are higher up, tell us about the building when you get in touch and we will confirm what access is needed. We work on concrete & block, joints between brick and frames and brickwork movement joints, and the jobs we see most are failed sealant between panels on a façade and gaps where render, brick and frames meet.
External sealant needs dry, clean surfaces, so work around Chidham is planned for dry weather. Tell us about access to all sides of the building, including outbuildings and garages.
Our work is backed for twelve months.
- Location
- Chidham (PO18)
- Wider area
- West Sussex
- Guarantee
- A year, on every job
- Price
- A clear price before we start
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Your questions about external mastic in Chidham
Do you work for landlords with property near Nutbourne station?
Yes, we work for landlords and agents. Just ring 0345 464 0079 or send us an email and tell us about the property, and we will send you a clear quote.
Is Chidham within the area you cover?
Yes, smaller places are covered as well as towns. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
How long should I leave it?
Cure times vary by product and the temperature. Before we leave, we’ll tell you the cure time.
Are you insured?
Yes. We are fully insured, and we can confirm the details when we quote.
How long does the job take?
It depends on the size of the job, but most jobs take a few hours for a handful of joints, longer for a whole elevation. We’ll tell you when we quote.
How do you reach high-level joints?
That depends on the building and the joints. Where joints can be reached safely, we will do them. Tell us about the building and we will confirm what access is needed.
Will there be a smell?
Some sealants have a smell while they cure. Ventilation helps.
Can you do several jobs on one visit?
Yes, and it often makes sense. Combining jobs makes good use of the visit, so mention them when you ask for a quote.
Also near Chidham
What else we do in Chidham
External mastic in Chidham: local notes
Chidham 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. With historic houses such as Warblington Castle (about 4.1 miles west) nearby, there’s older building stock in the area around Chidham as well as newer homes. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth.
If you live in an older home near The Parish Church of St Mary, old and new materials meet at the roofline and walls, which is where sealant earns its keep. Managing a site like Chidham Parochial Primary School? Then its movement joints, gutters and trims need looking after like any other building’s.
Chidham is about 4 miles west of Chichester, in West Sussex. Across the PO18 area, we cover external mastic for homes and businesses. We cover 371 towns and villages across West Sussex, from the larger towns to small villages. There’s also a page for Portsmouth, roughly 9 miles from Chidham.
Work in PO18 works the same way as everywhere else we cover. Whether your property is on Chidham Lane, Harbour Way and Cot Lane or a nearby road, we can help. If you are just outside Chidham, we cover Nutbourne (1 mile north-west), Bosham (1 mile east), Broadbridge (1 mile east), Hambrook (1 mile north) and Bosham Hoe (2 miles south-east). Within a short drive, we also cover Bognor Regis (9 miles east), Chichester (4 miles east), Selsey (8 miles south-east), Littlehampton (15 miles east), Emsworth (3 miles north-west) and Portfield (5 miles east).
Local landmarks in Chidham
Typical jobs here are in homes near Bourne Community College, among other places. For rail, the closest station is Nutbourne station, roughly 1 mile north-west. Well-known places in the area include Warblington Castle (4.1 miles west) and St Richard's Hospital (4.6 miles east). Open spaces near Chidham include Nutborne Marshes and Stoke Down.
When to call us in Chidham
Poor preparation causes many early failures: dusty or wet faces, no primer where one was needed, or old sealant left in. The new sealant then lets go long before it should.
Any of these means the joints need attention:
- Rain getting behind render or cladding at a joint
- Weeds or debris growing in open joints
- Hard, crazed mastic that has stopped moving
- Sealant pulling away from one side of the joint
If you let a flat or house near Nutbourne station, split movement joints are easy to miss on a rental until damp shows inside.
What your quote should include
- Whether they’re fully insured
- Which sealant they’ll use, and why
- What the cure time is
- Whether all the old sealant comes out first
Why act early in Chidham
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 Chidham can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
Combining jobs into one visit is usually more efficient than separate visits, so tell us about everything that needs sealing. We will give you a clear price for the lot.
Why choose Mr Mastic in Chidham
- Domestic, commercial and hotel work
- Over 20 years’ experience
- Fully insured
- You choose the colour before work begins
Take a look at how sealant jobs are priced or what customers say.
What we do, step by step
A visit follows a simple pattern: we check the joints, protect the area around them, carry out the job and tidy away. Most jobs take a few hours for a handful of joints, longer for a whole elevation. For a village or hamlet like Chidham, 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 start by walking round the building and agreeing the joints and the access.
- We cut out the old mastic and rake out anything in the joint.
- The faces are brushed clean and primed where the product requires it.
- Backing rod sized to the joint goes in to set the depth.
- We apply the sealant, tool it and check the whole run.
Preparing for the visit
- Tell us about any previous sealing or DIY attempts
- Tell us about access, such as stairs, a lift or high-level joints
- Mention any leaks or damp you’ve noticed
Ask for a quote
Want a quote for external mastic? Please call 0345 464 0079 or drop us an email and tell us about the job. We’ll explain what we’d do and send you a clear quote before we start.
Related advice
DIY versus a professional finish
The biggest DIY mistake is sealing over old sealant. New silicone will not bond to old, so it peels away and traps moisture behind it. All the old material has to come out first.
A DIY attempt doesn’t rule out a professional job. We remove it and do the joint properly, so tell us about it when you ask for a quote.
Keeping the joints in good condition
So the new joints stay in good condition:
- Do not let climbing plants root in the sealant
- Deal with leaking gutters that soak the joints below
- Ask before painting over external sealant
- Look over the joints every year, ideally after winter
Avoid pressure-washing straight into the joints. A strong jet can damage the edges of the bead.
An open movement joint lets rain into the wall every time it pours. That can lead to damp patches, staining and frost damage which cost more to put right than the joint.
What we can’t put right
Before booking, it’s worth knowing the limits too:
- Structural movement, which needs a surveyor or engineer
- Cracked brickwork or render that needs a builder or plasterer
- Walls that need new movement joints cut into them
Not sure which it is? You can call 0345 464 0079 or drop us an email and we will tell you honestly before you book.
What we seal
- Façade panels
- Concrete & block
- Copings & trims
- Render & cladding joints
- Brickwork movement joints
- Joints between brick and frames
Work for landlords, hotels and businesses
Housing providers, facilities teams and property managers book us too in Chidham and across West Sussex. Several sites can be quoted together, and we’re fully insured for the work.
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance.