West Sussex · England
External & façade joints in Ashurst, West Sussex
Movement joints in Ashurst need attention? We cut out the old, prepare the joints and apply the right sealant.
- Movement joints with cracked, split or missing sealant
- Weeds or debris growing in open joints
- Gaps where render, brick and frames meet
External mastic for homes and businesses in Ashurst
Many failed façade joints only get noticed once there’s a stain or a damp patch inside. We inspect them, agree which need doing and reseal with a weatherproof, flexible sealant in a colour to suit. If you have weathered mastic that no longer stretches and failed sealant between panels on a façade, we can help.
Outside joints can only be sealed when they’re dry, so work in Ashurst is booked around the forecast. Tell us about access to all sides of the building, including outbuildings and garages.
All our work is covered by our one-year guarantee.
- Place
- Ashurst (BN44)
- Wider area
- West Sussex
- Guarantee
- A year, on every job
- Quotes
- A clear quote up front
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
How it works
On the day, there’s very little for you to do. Point us to the joints and we’ll get on with it. The work itself takes a few hours to a few days, depending on the length of joint and the access. In a small place like Ashurst, access is usually the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- First, the joints are inspected and the access agreed.
- Every bit of old sealant and any mortar or debris is cut out.
- Joint faces are cleaned back and primed if the sealant needs it.
- We fit closed-cell backing rod to control the depth.
- We apply the sealant, tool it and check the whole run.
Getting ready for the visit
- Move anything stored near the joints
- Tell us about any water getting in
- On commercial sites, let us know about site rules
Get a quote
For a quote, call 0345 464 0079 or send us an email and tell us where the job is and what the problem looks like. We’ll give you a clear price before any work starts.
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External mastic in Ashurst: local notes
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.
Homes close to The Parish Church of St James include some older properties, and older walls, gutters and the joints where extensions meet them need a flexible sealant.
Ashurst is about 7 miles north of Shoreham-by-Sea, in West Sussex. Ashurst gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a one-year guarantee. Ashurst is one of 371 places in West Sussex we cover. There’s also a page for Brighton, about 11 miles away.
All of BN44 is within our area for external mastic, from the main roads to the quietest streets. That includes homes and businesses on Church Lane and School Lane. Close by, we work in Partridge Green (2 miles north-east), Dial Post (2 miles north-west), Wiston (2 miles south-west), Littleworth (3 miles north) and Ashington (3 miles west). We also work in nearby towns such as Crawley (14 miles north-east), Horsham (9 miles north), Worthing (8 miles south-west), Haywards Heath (11 miles north-east), Burgess Hill (9 miles east) and Littlehampton (12 miles south-west).
Landmarks near Ashurst
We work in homes and buildings around Fountain Inn, among other places. A little further out are Steyning Museum (3.1 miles south). For a walk, there’s Chanctonbury Hill and Knepp Wildland.
Why act early in Ashurst
The longer a joint stays open, the more water the wall takes in. In cold weather, frost can damage wet brick and render, so the problem grows beyond the joint itself. In a small place like Ashurst, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
What you pay reflects the work, not a rough estimate. That is why we ask a few questions first and give you a clear quote before any work starts.
Why choose Mr Mastic in Ashurst
- 180+ five-star Google reviews
- A choice of colours where the product allows
- A 12-month guarantee on all work
- Approved under the ARBOMaster scheme
Take a look at how sealant jobs are priced or our reviews.
Your questions about external mastic in Ashurst
Do you cover Ashurst for external mastic?
Yes, Ashurst is within the area we cover. Our work covers London and the South East. Just call 0345 464 0079 or send us an email with a few details of the job.
Is there a guarantee on external mastic in Ashurst?
All our work, in Ashurst and everywhere else, comes with a 12-month guarantee. We are fully insured, and an ARBOMaster approved applicator.
Do you seal joints where cladding meets other materials?
Yes. Different materials move at different rates, so the joint between them must be flexible. The sealant is matched to both sides.
Can you reach joints on upper floors?
It depends on the building. Send us pictures and a rough idea of the height, and we’ll confirm what access is needed.
What do you need from me for a quote?
Let us know what needs doing and where, with photos by email if possible. We’ll ask anything else we need to know.
What is backing rod for?
Backing rod controls the sealant depth and keeps it off the back of the joint. That way it bonds to the two sides only and can stretch.
Can you match the colour of my brickwork?
There’s a good range of exterior colours, including greys, browns, whites and stone tones. We pick the one that suits your wall best so the joint doesn’t draw the eye.
How long before the joint can be used?
That depends on the sealant used, so please follow the time we give you.
Work for landlords, hotels and businesses
Housing providers, facilities teams and property managers book us too. Several sites can go on one quote, and we are fully insured.
For anyone letting property in or around Ashurst, jobs at different addresses can go on one quote. Send us the addresses and the work at each.
Can I do it myself?
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
If you are set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it fails, we can still redo it.
Aftercare tips
How long the joints last depends on use and care. We suggest:
- Never let anyone fill a movement joint with mortar
- Do not let climbing plants root in the sealant
- Have failed joints looked at early
- Ask before painting over external sealant
Do not let soil, plants or ivy build up against the new joints. Damp material against the sealant shortens its life.
A joint that has stopped moving pushes the movement elsewhere, generally as cracking in the brickwork or render nearby. Catch it early and you reduce the risk.
Signs you need external mastic in Ashurst
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.
Keep an eye out for any of the following:
- Weeds or debris growing in open joints
- Movement joints with cracked, split or missing sealant
- Panel joints letting water in
- Water getting into walls through failed joints
If you look after a building such as Ashurst CofE Primary School, its movement joints, gutters and trims need looking after like any other building’s.
What to look for in a quote
- Who does the work, and how experienced they are
- What insurance they hold
- Which sealant they’ll use, and why
- Is the old sealant removed completely?
How we quote for external mastic
We quote each job individually. These are the things that affect it:
- Any working-time requirements on site
- Access and height
- The type of sealant required
- Mould in or behind the old joints
Combining jobs into one visit usually makes better use of the time than several visits, so tell us about everything that needs sealing. We’ll give you a clear quote for the lot.
What we need to know
A few details help us give you an accurate quote. When you ask for a quote, tell us:
- Where the job is, and your postcode
- What the problem is, such as mould, gaps, leaks or cracking
- Photos by email, if that’s easy
- If someone has resealed it before
If you are in Ashurst and need external mastic, call 0345 464 0079 or drop us an email. A short description of the job and where it is helps us quote, and you will get a clear quote before any work starts.