West Sussex · England
West Thorney External Mastic
External mastic for West Thorney and the surrounding area: the right sealant, proper preparation and a neat finish. Call for a quick quote.
- Failed sealant between panels on a façade
- Brick movement joints where the sealant has split
- Rain getting behind render or cladding at a joint
About our external mastic in West Thorney
Where two different materials meet, such as brick and render or blockwork and metal, they move at different rates. A flexible exterior sealant takes up that movement where a rigid filler would soon crack. If you’re dealing with sealant pulling away from one side of the joint and cracked joints where brick meets render or frames, we can help, whatever the surface.
Outside joints can only be sealed when they’re dry, so work in West Thorney is booked around the forecast. Let us know about access to every wall, plus any garages or outbuildings.
The work is covered for a year after we finish. If anything is not right with it, call 0345 464 0079 or email us.
- Where
- West Thorney (PO10)
- Region
- West Sussex
- Guarantee
- One year on every job
- Quote
- Quoted before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
When something else is needed
We will always be straight with you, so here’s what new sealant will not do:
- Rising or penetrating damp from elsewhere in the wall
- Cracks in the bricks or render themselves, away from the joints
- Failed render or damaged cladding panels
If in doubt, phone 0345 464 0079 or email us and we will say what we think.
Joints and surfaces we work on
- Copings & trims
- Concrete & block
- Joints between brick and frames
- Render & cladding joints
- Brickwork movement joints
- Façade panels
Quotes for external mastic in West Thorney
You’ll get a clear quote before work begins. It takes into account:
- The number and length of the joints
- Working hours on commercial sites
- Whether there’s mould to deal with
- Whether the work is at height
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, any mould to treat, and whether the work is at height. We take all of that into account in your quote.
What we need to know
To make quoting easier, let us know:
- Pictures of the joints, sent by email
- What the problem is, such as mould, gaps, leaks or cracking
- The rough size of the job
- Where the job is, and your postcode
Call for a quick quote, or send an email if you’d rather. Tell us about the joints that need doing and we’ll explain what’s involved.
The process
Good joint work is mostly preparation, so that is where we spend the time. Every joint is cleaned and dried before new material goes in. All told, the work takes anything from a few hours to several days, depending on the building. Somewhere like West Thorney needs a little journey planning: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- Each joint is checked and the colour of the new sealant agreed.
- We take out the old sealant until the faces are sound.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- Primer is applied wherever the sealant needs it.
- We gun in low-modulus sealant and tool it neatly.
Getting ready for the visit
- Plan for the work area to be out of bounds to pets and children
- Clear items away from the joints we are working on
- Mention any tricky access
Ask for a quote
For external mastic in West Thorney, ring 0345 464 0079 or email us. A short description of the job and where it is helps us quote, and you will get a clear quote before work begins.
Read more
West Thorney buildings and the weather
West Thorney is within about 1 mile of the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. That’s hard on movement joints and outside wall joints, especially on the side facing the sea. The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
In the older streets around The Parish Church of St Nicholas, the joints between older walls, newer extensions and the roofline need a sealant that can move. Schools such as Thorney Island Community Primary School are buildings too, and its movement joints, gutters and trims need looking after like any other building’s.
West Thorney is about 5 miles south-east of Havant, in West Sussex. Homes, rented property, offices and hotels in West Thorney can book us for external mastic. The work is guaranteed for a year. Our area takes in 371 places across West Sussex. You can also see our page for Portsmouth, about 7 miles away.
All of PO10 is within our area for external mastic. Close by, we work in Thorney Island (1 mile north-west), Tye (2 miles west), Southbourne (2 miles north), North Hayling (2 miles west) and Northney (2 miles west). Within a short drive, we also cover Bognor Regis (10 miles east), Chichester (6 miles east), Selsey (8 miles south-east), Emsworth (3 miles north-west), Portfield (7 miles east) and Yapton (13 miles east).
Local landmarks in West Thorney
In West Thorney, that means homes and buildings near Eames Farm and Bourne Community College, among other places. For rail, the closest station is Southbourne station, roughly 2.2 miles north of the centre. Other landmarks nearby include Emsworth Museum (2.5 miles north-west) and Warblington Castle (3.1 miles north-west). Green spaces nearby include Nutborne Marshes.
What we’re called out for in West Thorney
The wrong product in a moving joint is a classic cause. A stiff, general-purpose sealant cannot cope with a joint that moves a lot, and it tears off the sides.
Any of these means the joints need attention:
- Hard, crazed mastic that has stopped moving
- Joints with sealant missing in places
- Leaking joints around cladding and façade panels
- Plants rooting in failed movement joints
Letting a property close to Southbourne station? Then failed wall and movement joints let damp in, so they’re worth checking between tenancies.
What your quote should include
- Who does the work, and how experienced they are
- What happens if the job turns out different
- Whether the sealant suits the joint
- What preparation is included
Can I do it myself?
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and doesn’t move well, and getting the depth right matters as much as the look.
Sealing over old silicone is the commonest DIY error. Silicone does not stick to old silicone, so it peels away and traps moisture behind it. All the old material has to come out first.
West Thorney: your questions answered
Is West Thorney within the area you cover?
Yes. West Thorney 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.
Do you work for landlords with property near Southbourne station?
Yes. We work for landlords and agents as well as homeowners, and several properties can be quoted together. You can phone 0345 464 0079 or send us an email with the details for a clear quote.
Can you seal over the old sealant?
No. Fresh sealant doesn’t stick to old sealant, and it traps any mould or water underneath. We remove it all first.
Will the old sealant be removed?
Yes, always, and completely. New sealant will not bond properly to old, so the joint is cleaned back first.
Where do you work from?
We work from Crawley. Our applicators cover West Thorney, along with the rest of our area.
Will you leave a mess?
Tidy work is part of the job. Nearby surfaces are protected.
Can you seal joints between two different materials?
Yes. We cut out the old sealant, prepare both faces and reseal with a flexible exterior product. We pick a colour that works with both materials.
Do you work for hotels and businesses?
Yes. We’ve worked for hotels, offices and other businesses.
Work for landlords, hotels and businesses
Failed sealant is one of the commonest items on a check-out report, and it’s quick to put right between tenancies. Several properties can go on one quote.
Water getting past a failed joint can damage the building, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance.
Places near West Thorney
What else we do in West Thorney
Keeping the joints in good condition
Aftercare is simple:
- Never let anyone fill a movement joint with mortar
- Point out the joints to other trades
- Check external joints each spring
- Keep soil, plants and ivy away from the joints
Keep pressure washers away from the sealant. A strong jet can damage the edges of the bead.
Gaps, plants or missing sealant in a joint are worth getting looked at. Earlier resealing means a smaller job and a better result.