West Sussex · England
Petworth External Mastic
External mastic for Petworth, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Weeds or debris growing in open joints
- Joints where the bead has come unstuck
- Rigid filler in a joint that should flex
External mastic in Petworth
Joints between dissimilar materials, like brick against render or concrete against a steel frame, see movement from both sides. A flexible exterior sealant takes up that movement. If you are dealing with leaking joints around cladding and façade panels and hard, crazed mastic that has stopped moving, we can help, on brickwork movement joints, joints between brick and frames and concrete & block alike.
Somewhere as small as Petworth, homes and farm buildings often face open ground, so walls and rooflines take the full force of wind and rain. Gutter joints and wall joints there need a sealant that can flex and stay put.
Each job carries a 12-month guarantee.
- Location
- Petworth (GU28)
- Region
- West Sussex
- Guarantee
- 12 months on all our work
- Quotes
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
What we cannot put right
It helps to know what we cannot do:
- Cracking across the wall rather than at a joint
- Rising or penetrating damp from elsewhere in the wall
- Adding movement joints to masonry that has none
Not sure which it is? You can phone 0345 464 0079 or drop us an email and we’ll tell you honestly before you book.
Where we work in Petworth
- Façade panels
- Joints between brick and frames
- Brickwork movement joints
- Render & cladding joints
- Copings & trims
- Concrete & block
For landlords and businesses
If you manage several properties in or around Petworth, jobs at different addresses can go on one quote. Just tell us the addresses and what each one needs, and photos by email help.
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements and we’ll give you a quote.
Your questions about external mastic in Petworth
Is Petworth in your area for external mastic?
Yes. Our work covers London and the South East, and Petworth is part of that. You can ring 0345 464 0079 or drop us an email and tell us what needs doing.
I let a flat near Pulborough station. Can you help?
Yes. We work for landlords and agents as well as homeowners, and several properties can go on one quote. You can call 0345 464 0079 or email us with the details for a clear quote.
Can you seal over the old sealant?
No, because it fails. We remove every bit of old sealant first, so the new sealant bonds properly.
Do you use backing rod?
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 I add another job to the visit?
Yes, and it often makes sense. Combining jobs makes good use of the visit.
How long does the job take?
It depends on the size of the job, but most jobs take a few hours for a handful of joints, longer for a whole elevation. We’ll tell you when we quote.
Do you work for hotels and businesses?
Yes. Hotels, offices and other businesses use us, and we’re fully insured.
Are you an approved applicator?
Yes. Mr Mastic is an ARBOMaster approved applicator.
Looking after it afterwards
Looking after new joints is easy:
- Walk round the building once a year and look at the joints
- Never let anyone fill a movement joint with mortar
- Fix overflowing gutters above sealed joints
- Tell anyone working on the walls about the movement joints
Keep pressure washers away from the sealant. High-pressure water can lift the edges.
Gaps, plants or missing sealant in a joint are worth getting looked at. Earlier resealing means a smaller job and a better result.
Why act early in Petworth
A failed movement joint lets water into the wall, behind render and cladding. Resealing early keeps the job to the joint itself, instead of the wall and finishes around it. Where a wall is exposed, as many are in small places like Petworth, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
Some things make a job bigger or smaller: the old material and how easily it comes out, any mould to treat, and whether the work is at height. Your quote takes all of that into account.
Why us?
- Rated 4.9 stars on Google
- An ARBOMaster approved applicator
- Domestic, commercial and hotel work
- Full insurance on every job
Take a look at how sealant jobs are priced and what customers say.
What we are called out for in Petworth
Poor preparation causes many early failures: dusty or wet faces, no primer where one was needed, or old sealant left in. The new sealant then lets go long before it should.
Signs it’s time to call us include:
- Sealant that has lost its bond to the brick or render
- Brick movement joints where the sealant has split
- Failed sealant between panels on a façade
- Cracked joints where brick meets render or frames
For site and facilities teams at buildings such as Petworth Cof E Primary School, larger buildings have long runs of movement joint that eventually need resealing.
Comparing quotes
- Who turns up on the day
- How the colour is chosen
- What the cure time is
- What guarantee comes with the work
Also near Petworth
More services for Petworth
External mastic in Petworth: local notes
The South East is one of 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 0.3 miles north) are a reminder that the area around Petworth has older buildings as well as new. Where a home is older, older brick and stone need a sealant that suits them, at the right joint depth.
If you live in an older home near Sacred Heart Church, older walls, gutters and the joints where extensions meet them need a flexible sealant. Rented homes near Pulborough station change hands often, and split movement joints are easy to miss on a rental until damp shows inside.
Petworth is about 12 miles north-east of Chichester, in West Sussex. Whether you are in the middle of Petworth or further out, we cover external mastic for every kind of property. Our West Sussex coverage runs to 371 places, and Petworth is one of them. For nearby work, see our Crawley page (20 miles or so).
Jobs for external mastic in GU28 is quoted and booked the same way as anywhere else. If you need external mastic at a property on Station Road, Back Lane and Rosemary Lane or a nearby road, we can help. Being close to the A272 and A283, Petworth is easy for our applicators to reach. If you are just outside Petworth, we cover Hampers Green (1 mile north), Haslingbourne (1 mile south-east), Tillington (1 mile west), Rotherbridge (1 mile south-west) and Upperton (1 mile north-west). We also work in nearby towns such as Horsham (14 miles north-east), Worthing (14 miles south-east), Bognor Regis (14 miles south), Chichester (12 miles south-west), Littlehampton (12 miles south) and Rustington (13 miles south).
What’s near Petworth
We work in homes and buildings around The Old Square Tavern. The nearest railway station is Pulborough station, about 4.4 miles south-east of the centre. Nearby you’ll also find Coates Castle (2.6 miles south) and Coultershaw Heritage Site (1.2 miles south). The countryside around Petworth includes The Mens.
How it works
The work is kept neat and contained to the area we’re working on. The job normally takes anything from a few hours to several days, depending on the building, and we explain the cure time before we leave. Somewhere as small as Petworth, 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.
- Failed sealant is removed back to clean, sound faces.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- We prime the faces where required.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
How to prepare
- On commercial sites, let us know about site rules
- Where the joints are inside, avoid wetting them before we arrive
- Mention any tricky access
Getting 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, and email pictures if that is easy.
Advice
What affects the quote in Petworth
For a quick quote, just ask. The main things that affect it are:
- How many rooms, windows or areas are involved
- Whether old sealant or filler has to be cut out
- The size of the job
- Access and height
What you pay reflects the work, not a rough estimate. That’s why we ask a few questions first and give you a clear price before we start.
Asking for a quote
You do not need to know the technical terms. Just tell us:
- Any previous sealing or DIY work
- Whether it’s a home or a business
- Where the job is, and your postcode
- What’s wrong with the joints now
We quote each job on its own, so the first step is telling us about yours. Just phone 0345 464 0079 or email us with the details and send pictures if you have them.