West Sussex · England
Avisford External Mastic
Sealing brickwork movement joints, render, cladding and façade joints for homes and businesses in Avisford and across West Sussex. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- Movement joints filled with mortar instead of sealant
- Sealant that has lost its bond to the brick or render
- Weathered mastic that no longer stretches
Avisford: your questions answered
Do you work for landlords with property near Barnham station?
Yes, rental work is part of what we do. Just ring 0345 464 0079 or email us and tell us about the property, and we’ll give you a clear price.
Is Avisford within the area you cover?
Yes. Avisford 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.
What do you put in the joint?
Quality sealants from brands including Arbo and Everbuild, chosen to suit the joint. We will tell you what we are using and why.
How long does external mastic last?
That depends on the wall, the weather and the movement. Look for splits, hardening or edges coming away.
What information do you need?
The location, the problem and the rough size of the job. Photos by email help too.
Do you seal joints where cladding meets other materials?
Yes. Different materials move at different rates, so a flexible sealant is needed where they meet. The sealant is matched to both sides.
Will there be a smell?
Possibly a little. Any smell clears as the sealant cures.
Where are you based?
We’re a Crawley-based firm, with over 20 years’ experience. We work across South East England, London and Scotland.
How we handle external mastic in Avisford
External mastic is a job where short cuts show quickly. Overfilled joints, missing backing rod and sealant laid over old sealant rarely last long. We strip the joint back and start again. If you have rain getting behind render or cladding at a joint and brick movement joints where the sealant has split, we can put it right.
In a village or hamlet like Avisford, older cottages and farm buildings often stand in the open, where walls and rooflines take the weather head on. Joints on those walls need a sealant that moves with the building and stays in place.
All our work comes with our 12-month guarantee, wherever you are in West Sussex.
- Where
- Avisford (BN18)
- Region
- West Sussex
- Guarantee
- 12 months on all our work
- Quote
- A clear price before we start
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Should I try it myself first?
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, 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.
For landlords and businesses
For anyone letting property in or around Avisford, jobs at different addresses can go on one quote. Send us the addresses and the work at each.
We work for landlords and letting agents as well as householders. Resealing between tenancies keeps a property looking cared for.
What happens on the day
When we get to you, we check the joints match what you told us. If we find something unexpected, we talk it through with you first. After that, the work takes a few hours for a handful of joints, longer for a whole elevation. Somewhere as small as Avisford, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We look at every joint and agree a colour to suit the wall.
- We take out the old sealant until the faces are sound.
- Backing rod goes in so the sealant can stretch between the two faces.
- Primer is applied wherever the sealant needs it.
- We gun in low-modulus sealant and tool it neatly.
Before we arrive
- Move anything stored near the joints
- On commercial sites, let us know about site rules
- Plan for the work area to be out of bounds to pets and children
Get a quote
For a quick quote, get us on the phone, or email us if that’s easier. Tell us about the joints that need doing and we’ll explain what’s involved and give you a clear quote.
Read more
Aftercare tips
Looking after new joints is easy:
- Do not let climbing plants root in the sealant
- Look over the joints every year, ideally after winter
- Make sure movement joints are not pointed over
- Point out the joints to other trades
Only paint over the joint if we have confirmed the sealant can take paint. Paint can crack on a flexible joint.
Gaps, plants or missing sealant in a joint are worth getting looked at. Earlier resealing means a smaller job and a better result.
Avisford buildings and the weather
London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
For landlords with property near Barnham station, failed wall and movement joints let damp in, so they’re worth checking between tenancies. In the older streets around Church of St Mary, an extension built onto an older house moves differently, and the joint between them takes the strain.
Avisford is about 4 miles north-west of Littlehampton, in West Sussex. From the centre of Avisford to the outskirts, external mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Avisford is one of 371 towns and villages in West Sussex where we work for external mastic. For nearby work, see our Portsmouth page, about 20 miles away.
All of BN18 is covered for external mastic. If you are just outside Avisford, we cover Binsted (1 mile east), Walberton (1 mile south-west), Slindon Common (1 mile north-west), Slindon (1 mile north-west) and West Barnham (2 miles south-west). Larger places within reach include Worthing (9 miles east), Bognor Regis (5 miles south-west), Chichester (7 miles west), Selsey (11 miles south-west), Littlehampton (4 miles south-east) and Shoreham-by-Sea (15 miles east).
What’s near Avisford
In Avisford, that means homes and buildings near St Philip Howard Catholic High School, among other places. The closest station to Avisford is Barnham station, roughly 1.7 miles south-west of the centre. Nearby you’ll also find Arundel Castle (2.6 miles east) and Arundel and District Hospital (2.1 miles east). Green spaces nearby include Bignor Hill and WWT Arundel.
Do you need external mastic in Avisford?
UV, rain and frost all age exterior sealant. 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.
Common reasons people contact us include:
- Leaking joints around cladding and façade panels
- Hard, crazed mastic that has stopped moving
- Moss and dirt in joints with no sealant left
- Joints where the bead has come unstuck
For site and facilities teams at buildings such as Walberton and Binsted CofE Primary School, larger buildings have long runs of movement joint that eventually need resealing.
Comparing quotes
- Whether VAT is included
- Which sealant they’ll use, and why
- Whether all the old sealant comes out first
- Who does the work, and how experienced they are
How we quote for external mastic
Jobs vary more than people expect. The main factors:
- Mould in or behind the old joints
- The number and length of the joints
- Which sealant suits the joint
- Access and height
Some things make a job bigger or smaller: the old material and how easily it comes out, any mould to treat, and whether we need extra access for height. We take all of that into account in your quote.
Asking for a quote
To make quoting easier, let us know:
- What the problem is, such as mould, gaps, leaks or cracking
- If someone has resealed it before
- Roughly how big the job is
- The address or postcode of the job
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is, and add photos by email if you can.
Towns and villages near Avisford
What else we do in Avisford
Leave it or put it right?
A failed movement joint lets water into the wall. Dealing with it early keeps the repair to the joint, rather than the wall around it. Around Avisford, older homes often have timber in their 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 how easy the joints are to reach. You will have a clear quote before any work starts, so you know where you stand.
Why Avisford clients choose us
- Experience in homes, commercial sites and hotels
- We are fully insured
- Over 20 years’ experience
- Rated 4.9 stars on Google
Take a look at what affects the cost or our reviews.