West Sussex · England
External & façade joints in Heyshott Green, West Sussex
Problem with your movement joints in Heyshott Green? We remove the old material, prepare the joints and seal them properly.
- Panel joints letting water in
- Sealant pulling away from one side of the joint
- Water getting into walls through failed joints
How the visit works
We keep the work tidy and contained to the area we’re working on. Expect the work to take a few hours to a few days, depending on the length of joint and the access, and we tell you how long to leave it before we go. Somewhere as small as Heyshott Green, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We start by checking each joint, agreeing the ones to redo and how we’ll reach them.
- Old sealant and any debris are cut and raked out.
- We clean both faces of the joint and prime them where the product calls for it.
- We push in closed-cell backing rod so the sealant is the right depth and bonds to the sides only.
- A flexible exterior sealant is applied and tooled in a colour to suit the wall.
Preparing for the visit
- Tell us if parking is tricky
- For business premises, tell us about site rules or sign-in
- Clear items away from the joints we’re working on
Get a quote
If you are in Heyshott Green and need external mastic, call 0345 464 0079 or send us an email. Tell us what the problem is and where, and you’ll get a clear quote before any work starts.
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External mastic in Heyshott Green
External mastic is a job where short cuts show quickly. Overfilled joints, missing backing rod and sealant laid over old sealant all tend to fail early. We take the old material out and do it properly. We are often asked to deal with brick movement joints where the sealant has split and sealant pulling away from one side of the joint, on render & cladding joints, copings & trims and joints between brick and frames.
Somewhere as small as Heyshott Green, 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.
There’s a 12-month guarantee on every job, large or small.
- Where
- Heyshott Green (GU29)
- Region
- West Sussex
- Guarantee
- 12 months on all our work
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Updated
- 26 October 2026
When it isn’t the sealant
Some problems need a builder, plumber or other trade rather than us:
- Damp that isn’t coming from the joint
- Walls that need new movement joints cut into them
- Render that’s blown, hollow or coming away
Not sure which it is? You can call 0345 464 0079 or drop us an email and we’ll tell you honestly before booking.
Joints and surfaces we work on
- Copings & trims
- Joints between brick and frames
- Concrete & block
- Brickwork movement joints
- Façade panels
- Render & cladding joints
Looking after it afterwards
A little care helps the new joints last. We recommend:
- Tell anyone working on the walls about the movement joints
- Leave the joints unpainted unless we have said otherwise
- Walk round the building once a year and look at the joints
- Keep soil, plants and ivy away from the joints
Only paint over the joint if we’ve confirmed the sealant can take paint. Paint can crack on a flexible joint.
A joint that has stopped moving pushes the movement elsewhere, often as cracks near the joint. Resealing it early helps prevent that.
What the job involves on each surface
Joints between dissimilar materials
Each side of the joint may need its own preparation. We prepare both faces so the sealant bonds properly.
Concrete and blockwork
Wide joints in concrete need the depth controlling carefully. Backing rod sized to the joint sets it and keep the sealant to the right depth.
FAQs for Heyshott Green
Is external mastic in Heyshott Green guaranteed?
Every job comes with our 12-month guarantee, wherever it is. We’re fully insured, and an ARBOMaster approved applicator.
Is Heyshott Green within the area you cover?
Yes. Heyshott Green is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
Can you quote for more than one area?
Yes. Several rooms, windows or areas can go on one quote.
I’m a tenant. Can you help?
Yes, though it’s best to check with your landlord first. Many landlords are glad to have it sorted.
Are you an approved applicator?
Yes. We are an ARBOMaster approved applicator, the approved applicator scheme for Arbo sealants.
Are you insured?
Yes. Full insurance covers our work.
When is the sealant fully cured?
Many sealants skin over quickly but take longer to cure fully. We’ll give you the cure time for the product we used.
Do you work for landlords and businesses?
Yes. As well as homeowners, we work for landlords, agents, businesses and hotels in Heyshott Green.
Work for landlords, hotels and businesses
A neglected joint can let water reach the structure, which matters even more when someone else lives there. Resealing at the right time is simple maintenance.
Letting agents often deal with us directly. Tell us the address, the job and how access works.
What we’re called out for in Heyshott Green
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.
Most people get in touch after spotting something like this:
- Gaps where render, brick and frames meet
- Rigid filler in a joint that should flex
- Old sealant gone brittle and cracked
- Panel joints letting water in
Homes close to The Parish Church of St James include some older properties, and the joints between older walls, newer extensions and the roofline need a sealant that can move.
What your quote should include
- Are they insured?
- Which sealant they’ll use, and why
- How long to leave it before use
- Whether VAT is included
What affects the cost of external mastic
For a quick quote, just ask. The main things that affect it are:
- The product the joint needs
- How many areas need sealing
- Access and height
- The size of the job
No two jobs are quite the same, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all play a part, and we’ll explain the quote if you ask.
What to tell us for a quote
To help us quote quickly, please include:
- If it’s domestic, commercial or a hotel
- Any access issues, like height or stairs
- Roughly how big the job is
- The problem you’ve noticed
To get a quote, ring 0345 464 0079 or email us and tell us where the job is and what the problem looks like. We’ll give you a clear price before any work starts.
What external mastic looks like in Heyshott Green
The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. With historic houses such as Cowdray House (about 1.9 miles north) nearby, there’s older building stock in the area around Heyshott Green as well as newer homes. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material.
If you look after a building such as Midhurst Rother College, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Heyshott Green is about 9 miles north of Chichester, in West Sussex. Anywhere in GU29, we can carry out external mastic at your property. 371 places in West Sussex are on our list, from the larger towns to small villages. There’s also a page for Portsmouth, about 19 miles away.
Every address in GU29 is covered for external mastic, from the main roads to the quietest streets. Nearby, we also carry out external mastic in Heyshott (1 mile south-east), Hoyle (1 mile east), Cocking Causeway (1 mile north-west), Cocking (1 mile south-west) and West Lavington (1 mile north). We also work in nearby towns such as Bognor Regis (12 miles south), Chichester (9 miles south), Littlehampton (13 miles south-east), Emsworth (12 miles south-west), Rustington (14 miles south-east) and Storrington (12 miles east).
Local landmarks in Heyshott Green
Locally, jobs take us to homes and businesses close to Unicorn Inn. Well-known places in the area include Midhurst Community Hospital (2.3 miles north) and Midhurst Museum (1.9 miles north). Not far away are Graffham Common and Levin Down.