West Sussex · England
External Mastic in Bosham Hoe
External mastic in Bosham Hoe from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Leaking joints around cladding and façade panels
- Old sealant gone brittle and cracked
- Joints with sealant missing in places
Leave it or put it right?
Running new sealant over the old bead rarely lasts. The new layer cannot bond properly to old, weathered material, so we always take the old sealant out. Older cottages and farmhouses around Bosham Hoe can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
What it costs depends on the size of the job, how much old material has to come out and access to the work. We give a clear quote before work begins.
Why Bosham Hoe customers choose us
- Approved under the ARBOMaster scheme
- Any old sealant cut out fully, not covered over
- 4.9 on Google from 180+ five-star reviews
- Tidy, careful work
Take a look at what affects the cost or customer reviews.
External mastic in Bosham Hoe
We’re ARBOMaster approved applicators, and each external joint gets a sealant suited to it. Some surfaces need a primer before sealing and we use one wherever it does. If you are dealing with sealant that has lost its bond to the brick or render and movement joints with cracked, split or missing sealant, we can put it right, on render & cladding joints, façade panels and concrete & block alike.
In a village or hamlet like Bosham Hoe, older cottages and farm buildings often stand in the open, so walls and rooflines take the full force of wind and rain. Joints on those walls need a sealant that moves with the building and stays in place.
You are covered for a year from the day we finish. If there’s a problem with it, please ring 0345 464 0079 or email us.
- Location
- Bosham Hoe (PO18)
- Region
- West Sussex
- Cover
- A year, on every job
- Quote
- A clear quote up front
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
How the visit works
We bring everything the job needs with us, so you do not need to buy or prepare anything. Once we’ve agreed what’s being done, we protect the area and start. It normally takes a few hours to a few days, depending on the length of joint and the access. In a small place like Bosham Hoe, access is generally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- 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.
How to prepare
- For business premises, tell us about site rules or sign-in
- Clear items away from the joints we’re working on
- Mention if the joints have been sealed before
Ask for a quote
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints.
Related advice
Nearby places to Bosham Hoe
Also in Bosham Hoe
Looking after it afterwards
A little care helps the new joints last. We recommend:
- Have failed joints looked at early
- Do not let climbing plants root in the sealant
- Point out the joints to other trades
- Look over the joints every year, ideally after winter
If you have more work done on the wall, such as new render, cladding or an opening, show the contractor the movement joints. They should be kept open and resealed, not filled.
Gaps, plants or missing sealant in a joint are worth getting looked at. Early work is quicker and leaves a better finish.
Outside joints around Bosham Hoe
Bosham Hoe is within about 1 mile 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. Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
If you live in an older home near The Parish Church of the Holy Trinity, an extension built onto an older house moves differently, and the joint between them takes the strain.
Bosham Hoe is about 3 miles south-west of Chichester, in West Sussex. For external mastic in and around Bosham Hoe, please phone 0345 464 0079 or send us an email for a quick quote. We are based in Crawley and cover West Sussex, Bosham Hoe included. We cover 371 towns and villages across West Sussex, from the larger towns to small villages. There’s also a page for Portsmouth, roughly 10 miles from Bosham Hoe.
Every address in PO18 is covered for external mastic. That includes homes and businesses on Hoe Lane and Smuggler's Lane. Nearby, we also carry out external mastic in Bosham (1 mile north), West Itchenor (1 mile south-west), Broadbridge (2 miles north), Chidham (2 miles north-west) and Apuldram (2 miles east). We also work in nearby towns such as Bognor Regis (7 miles east), Chichester (3 miles north-east), Selsey (6 miles south-east), Littlehampton (14 miles east), Emsworth (5 miles north-west) and Rustington (15 miles east).
Landmarks near Bosham Hoe
The nearest railway station is Bosham station, roughly 1.9 miles north of the centre. Nearby you’ll also find Chichester Cathedral Treasury (3.1 miles north-east) and St Richard's Hospital (3.8 miles north-east). The countryside around Bosham Hoe includes Stoke Down and Nutborne Marshes.
Landlords, agents and businesses in Bosham Hoe
In hotels, rooms out of use cost money, so we plan the work room by room. Hotel work is part of what we do, alongside homes and businesses.
From a single let to a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a one-year guarantee.
Common problems we fix in Bosham Hoe
Buildings move more than people expect. Clay bricks expand slightly over their life, concrete and block shrink, and everything moves with temperature and wet. All of that ends up in the joint sealant.
The most common problems we see are:
- Hard, crazed mastic that has stopped moving
- Leaking joints around cladding and façade panels
- Sealant pulling away from one side of the joint
- Cracked joints where brick meets render or frames
Letting a property close to Bosham station? Then outside joints that have cracked can let damp into a rental, so check them between lets.
Before you book anyone
- Whether they seal over old material or remove it
- What happens if they find a problem under the old sealant
- What preparation is included
- Is VAT in the price?
What affects the cost of external mastic
We do not publish a price list. The quote depends on:
- How many rooms, windows or areas are involved
- How much old sealant there is and how hard it is to remove
- Any mould that needs treating
- Access and height
Combining jobs into one visit generally makes better use of the time than several visits, so it’s worth mentioning everything you’d like done. We’ll send you a clear quote for the lot.
Asking for a quote
What to tell us when you ask for a quote:
- Access, such as stairs, a lift or height
- Where the property is
- If someone has resealed it before
- How many joints, rooms or windows are involved
For external mastic in Bosham Hoe, ring 0345 464 0079 or drop us an email. Tell us what the problem is and where, and we will agree the price before any work begins.
What we cannot put right
To be straight with you, there are a few things sealant won’t fix:
- Cracked brickwork or render that needs a builder or plasterer
- Rising or penetrating damp from elsewhere in the wall
- Structural movement, which needs a surveyor or engineer
If in doubt, phone 0345 464 0079 or send us an email and we’ll say what we think.
Where we work in Bosham Hoe
- Copings & trims
- Brickwork movement joints
- Façade panels
- Render & cladding joints
- Joints between brick and frames
- Concrete & block
Your questions about external mastic in Bosham Hoe
Does the coastal weather in Bosham Hoe affect outside sealant?
Coastal homes put outside sealant through more weather than inland ones, so the choice of sealant and the preparation matter even more. Walls facing the sea are generally the first to need attention.
Is Bosham Hoe within the area you cover?
Yes, we do. We work across London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Does someone need to be in?
Access is agreed with you when the job is booked. For inside work, that normally means someone being in.
What is backing rod for?
We fit closed-cell backing rod wherever the joint depth needs controlling. It sets the sealant depth and prevents three-sided bonding.
Do you remove the old sealant?
Always. Sealing over old sealant is the main reason resealing fails early, so we never do it.
How do you reach high-level joints?
It depends on the building. Send us pictures and a rough idea of the height, and we’ll confirm what access is needed.
Can you quote for more than one area?
Yes. More than one area can go on one quote.
Is it worth trying it myself?
That depends on the joint. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional.