West Sussex · England
External & façade joints in Upperton, West Sussex
External mastic across Upperton and nearby, with old sealant always removed completely and a 12-month guarantee.
- Moss and dirt in joints with no sealant left
- Cracked joints where brick meets render or frames
- Rigid filler in a joint that should flex
External mastic for homes and businesses in Upperton
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 hard, crazed mastic that has stopped moving and weeds or debris growing in open joints, we can help, on copings & trims, joints between brick and frames and concrete & block alike.
Outside joints can only be sealed when they’re dry, so work in Upperton is booked around the forecast. Tell us about access to all sides of the building, including outbuildings and garages.
Whatever the size of the job, it’s backed by our 12-month guarantee.
- Location
- Upperton (GU28)
- Region
- West Sussex
- Cover
- A year, on every job
- Quotes
- A clear quote up front
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Common problems we fix in Upperton
Poor preparation causes many early failures: joint faces that were dusty or damp, unprimed where they needed it, or still carrying old sealant. The new sealant then lets go long before it should.
Signs it’s time to call us include:
- Weeds or debris growing in open joints
- Water getting into walls through failed joints
- Failed seals between different materials
- Sealant pulling away from one side of the joint
In the older streets around The Parish Church of All Hallows, an extension built onto an older house moves differently, and the joint between them takes the strain.
Before booking anyone
- What the quote includes, VAT included or not
- Whether the sealant suits the joint
- What the cure time is
- Whether they seal over old material or remove it
Towns and villages near Upperton
More services for Upperton
What we do, step by step
On the day, there’s very little for you to do. Show us the job and we will take it from there. The job generally takes anything from a few hours to several days, depending on the building from start to finish. Somewhere like Upperton needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- We inspect the joints and agree which need resealing and how they’ll be reached.
- The old mastic and anything lodged in the joint is removed.
- We clean both faces of the joint and prime them where the product calls for it.
- We push in closed-cell backing rod so the sealant is the right depth and bonds to the sides only.
- A flexible exterior sealant is applied and tooled in a colour to suit the wall.
Preparing for the visit
- Where the joints are inside, avoid wetting them before we arrive
- Mention any sign-in or site rules at work premises
- Mention if the joints have been sealed before
Ask for a quote
Call for a quick quote, or email us if that’s easier. Describe what needs sealing and we’ll talk you through the work.
Related advice
Walls and rooflines in Upperton
London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. Historic houses like Petworth House (about 1.2 miles south-east) are a reminder that the area around Upperton has older buildings as well as new. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth.
In and around Upperton, as anywhere, good external mastic starts with a clean, dry, properly prepared joint.
Upperton is about 12 miles north-east of Chichester, in West Sussex. Jobs in Upperton get the same care as everywhere else we work: the old material taken out, joints prepared properly and a 12-month guarantee. Across West Sussex, we cover 371 places, Upperton among them. Crawley is on our list too, around 21 miles away.
Jobs for external mastic in GU28 works the same way as everywhere else we cover. If you’re just outside Upperton, we cover Tillington (1 mile south-east), Hampers Green (1 mile east), River (1 mile west), Petworth (1 mile south-east) and Rotherbridge (2 miles south). Further out, we also cover Horsham (14 miles east), Bognor Regis (14 miles south), Chichester (12 miles south-west), Littlehampton (14 miles south), Rustington (14 miles south-east) and Storrington (10 miles south-east).
What’s near Upperton
A little further out are Midhurst Community Hospital (4.3 miles west) and Coultershaw Heritage Site (2.2 miles south). The countryside around Upperton includes Graffham Common and Blackdown.
What affects the cost of external mastic
There’s no set price list, because no two jobs are the same. The quote depends on:
- Working hours on commercial sites
- Whether the work is at height
- How many areas need sealing
- Mould in or behind the old joints
Doing several joints on one visit generally makes better use of the time than several visits, so it’s worth mentioning everything you’d like done. We will give you a clear price for the lot.
Asking for a quote
There’s no need for technical detail. Just tell us:
- Where the job is, and your postcode
- Roughly how big the job is
- Whether it has been sealed before
- Pictures of the joints, sent by email
We quote each job on its own, so start by telling us what you need. Simply call 0345 464 0079 or email us and describe the job, and photos are welcome.
Honest limits
To be straight with you, there are a few things sealant will not fix:
- Adding movement joints to masonry that has none
- Render that’s blown, hollow or coming away
- Cracks in the bricks or render themselves, away from the joints
If you’re not sure, just call 0345 464 0079 or send us an email and we’ll give you a straight answer before booking.
Where we work in Upperton
- Façade panels
- Brickwork movement joints
- Joints between brick and frames
- Concrete & block
- Render & cladding joints
- Copings & trims
Should I try it myself first?
If you’ve already had a go yourself, that’s fine. We remove it and do the joint properly, so tell us about it when you ask for a quote.
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, and the work is guaranteed for a year.
Questions from Upperton
Will you come out to Upperton?
Yes. Upperton is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Is external mastic in Upperton guaranteed?
Every job comes with our 12-month guarantee, wherever it is. We are also fully insured and ARBOMaster approved.
Should I try DIY first?
It depends on the job. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional, while a short indoor joint may be within reach.
How long does external mastic take?
A typical job takes anything from a few hours to several days, depending on the building, including preparation and clearing up. We will confirm how long when we quote.
What does external mastic cost?
The cost depends on the size of the job, access and how much old sealant has to come out. Ask us for a quote.
Will the old sealant be removed?
Yes. Sealing over the old bead is the commonest cause of early failure, and it’s something we never do.
Where do you work from?
Our base is Crawley. Our area covers South East England, London and Scotland.
Will you leave a mess?
No. We protect the surfaces around the joints, and we clear up the old sealant and our materials before we leave.
How the job changes by surface
Brickwork movement joints
Vertical joints in long brick walls let the brickwork expand without cracking. We reseal them with a low-modulus sealant over backing rod coloured to suit the wall.
Concrete and blockwork
Concrete faces can be dusty and porous, so preparation is key. We prime where the sealant needs it before sealing.
What happens if it’s left?
Sealing over the top of old mastic doesn’t hold for long. The new layer cannot bond properly to old, weathered material, so we always take the old sealant out. Older cottages and farmhouses around Upperton can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
Leaving a failed joint normally makes the job bigger, not smaller, because water and mould keep working on it. If you’re unsure, ring 0345 464 0079 or send us an email for an honest opinion and a quote.
Why book with us
- 20+ years of sealant experience
- Any old sealant cut out fully, not covered over
- We leave the area clean and tidy
- 4.9 on Google from 180+ five-star reviews
Take a look at our cost guide or what customers say.