West Sussex · England
Slindon Common External Mastic
External mastic for Slindon Common, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Leaking joints around cladding and façade panels
- Old sealant gone brittle and cracked
- Rain getting behind render or cladding at a joint
Slindon Common buildings and the weather
Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. Historic houses like Bignor Roman Villa (about 4.6 miles north) are a reminder that the area around Slindon Common has older buildings as well as new. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material.
Rented homes near Barnham station change hands often, and split movement joints are easy to miss on a rental until damp shows inside. For an older house near a landmark such as The Parish Church of St Mary, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Slindon Common is about 5 miles north-west of Littlehampton, in West Sussex. Every kind of property in Slindon Common is covered for external mastic. The work is guaranteed for a year. Slindon Common is one of 371 towns and villages in West Sussex where we work. Portsmouth is on our list too, around 20 miles away.
Postcode districts we cover here for external mastic: BN18. Whether your property is on Sunnybox Lane, Bridle Lane and Shellbridge Road or anywhere close by, we can help. Close by, we work in Slindon (1 mile north-west), Avisford (1 mile south-east), Binsted (1 mile south-east), Walberton (1 mile south) and Fontwell (1 mile west). Further out, we also cover Worthing (10 miles east), Bognor Regis (6 miles south-west), Chichester (7 miles west), Selsey (11 miles south-west), Littlehampton (5 miles south-east) and Shoreham-by-Sea (15 miles east).
Landmarks near Slindon Common
Around Slindon Common, our work takes us to homes and buildings near The Spur Public House and St Philip Howard Catholic High School. Slindon Common’s nearest station is Barnham station, about 2.1 miles south of the centre. Other landmarks nearby include Arundel Castle (3 miles east) and Arundel and District Hospital (2.5 miles east). Open spaces near Slindon Common include Bignor Hill and WWT Arundel.
About our external mastic in Slindon Common
As ARBOMaster approved applicators, we choose exterior sealants to suit the joint and the surfaces. Porous or awkward surfaces are primed where the sealant needs it and we use one wherever it does. Typical jobs include damp patches traced to an open external joint and weeds or debris growing in open joints, across joints between brick and frames, brickwork movement joints and façade panels.
Somewhere as small as Slindon Common, 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.
The work is guaranteed for twelve months. If there’s a problem with our work within the year, let us know and we’ll sort it.
- Location
- Slindon Common (BN18)
- Region
- West Sussex
- Guarantee
- A year, on every job
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
What affects the quote in Slindon Common
Your quote is based on your job. We take into account:
- The old material and how stubborn it is
- Mould in or behind the old joints
- Any working-time requirements on site
- How many areas need sealing
Leaving a failed joint generally makes the job bigger, not smaller, as water and mould keep getting in. If you’re not sure whether it needs doing, call 0345 464 0079 or email us for an honest opinion and a quote.
What to tell us for a quote
You don’t need to know the technical terms. It helps if you can tell us:
- Where the property is
- Whether it’s a home or a business
- Access, such as stairs, a lift or height
- The problem you’ve noticed
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints, and email pictures if that’s easy.
What we’re called out for in Slindon Common
Poor preparation causes many early failures: dusty or wet faces, no primer where one was needed, or old sealant left in. The sealant never bonds properly.
Signs it’s time to call us include:
- Panel joints letting water in
- Movement joints filled with mortar instead of sealant
- Hard, crazed mastic that has stopped moving
- Brick movement joints where the sealant has split
For site and facilities teams at buildings such as Slindon CofE Primary School, larger buildings have long runs of movement joint that eventually need resealing.
Before you book anyone
- Is VAT in the price?
- Whether the sealant suits the joint
- How the surfaces are prepared before sealing
- Which colour the sealant will be
What the job involves on each surface
Render joints
The face of render can be soft, so a sealant that stretches easily protects the edges. Priming is done where the sealant calls for it.
Joints between dissimilar materials
Wherever two materials meet, they move differently. We seal the joint with a flexible exterior sealant so the movement is taken up.
When it isn’t the sealant
It helps to know what we can’t do too:
- Cracking across the wall rather than at a joint
- Rising or penetrating damp from elsewhere in the wall
- Cutting new joints into brickwork, which is building work rather than sealant work
If in doubt, call 0345 464 0079 or email us and we will say what we think before you book.
Joints and surfaces we work on
- Copings & trims
- Concrete & block
- Façade panels
- Joints between brick and frames
- Brickwork movement joints
- Render & cladding joints
Looking after it afterwards
Joint life depends on how it’s used and looked after. Here’s what we suggest:
- Keep soil, plants and ivy away from the joints
- Point out the joints to other trades
- Check the sealant is paintable before painting near it
- Fix overflowing gutters above sealed joints
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.
Once a joint cannot move, the wall finds another way, often as cracks near the joint. Resealing it early helps prevent that.
How the visit works
On the day, we start by going over the job with you, so there are no surprises. Surfaces next to the work are protected before any work begins. The work normally takes a few hours to a few days, depending on the length of joint and the access. Somewhere like Slindon Common needs a little journey planning: 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.
Getting ready for the visit
- Tell us about any previous sealing or DIY attempts
- Tell us if parking is tricky
- Clear the area around the work
How to get a quote
If you are in Slindon Common and need external mastic, phone 0345 464 0079 or email us. Tell us what the problem is and where, and you will get a clear quote before we start.
Related advice
Also near Slindon Common
Also in Slindon Common
Why act early in Slindon Common
A failed movement joint lets water into the wall. Resealing early keeps the job to the joint itself, instead of the wall and finishes around it. Older cottages and farmhouses around Slindon Common can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
The cost 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 any work starts.
Why Slindon Common customers choose us
- Quality sealants from Arbo and Everbuild
- Old sealant always removed completely
- 20+ years of sealant experience
- We leave the area clean and tidy
Take a look at how sealant jobs are priced and our reviews.
Slindon Common questions
Will you come out to Slindon Common?
Yes, Slindon Common is covered. Our work covers London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
I let a flat near Barnham station. Can you help?
Yes, landlords and agents are among the people we work for. You can ring 0345 464 0079 or send us an email with the details for a clear quote.
How often do external joints need resealing?
It depends on the exposure, the movement and the product. Treat it as a maintenance item and look at it yearly.
Do you seal joints where cladding meets other materials?
Yes. Different materials move at different rates, so the joint between them must be flexible. We choose one that suits both surfaces.
Are you ARBOMaster approved?
Yes. We are ARBOMaster approved, the scheme for applicators of Arbo sealants.
Can you do several jobs on one visit?
Of course. Doing several areas at once is generally more efficient, so mention them when you ask for a quote.
Can you reach joints on upper floors?
That depends on the building and the joints. We work on joints that can be reached safely. Tell us about the building and we will confirm what access is needed.
Is there a guarantee?
Yes. Every job comes with a 12-month guarantee.