East Sussex · England
External Mastic in Piddinghoe
External mastic in Piddinghoe from a team with over 20 years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Failed sealant between panels on a façade
- Hard, crazed mastic that has stopped moving
- Movement joints with cracked, split or missing sealant
External mastic for homes and businesses in Piddinghoe
We’re ARBOMaster approved applicators, and each external joint gets a sealant suited to it. Some surfaces need a primer before sealing, and we do not skip that step. Typical jobs include joints pointed up with cement by mistake and movement joints with cracked, split or missing sealant, across façade panels, joints between brick and frames and render & cladding joints.
Somewhere as small as Piddinghoe, 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.
Every job comes with a one-year guarantee, wherever you are in East Sussex.
- Place
- Piddinghoe (BN9)
- Wider area
- East Sussex
- Cover
- A year, on every job
- Quotes
- A clear price before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Piddinghoe buildings and the weather
Piddinghoe is within about 2 miles of the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. Both are hard on movement joints and outside wall joints, which can dry out and crack sooner where a building faces 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.
In the older streets around The Parish Church of St John, an extension built onto an older house moves differently, and the joint between them takes the strain. If you let a flat or house near Newhaven Town station, split movement joints are easy to miss on a rental until damp shows inside.
Piddinghoe is about 1 mile north-west of Newhaven, in East Sussex. Jobs in Piddinghoe get the same care as everywhere else we work: old sealant removed completely, careful preparation and a 12-month guarantee. We cover 289 towns and villages across East Sussex, large and small. Our Brighton page covers work nearby (7 miles or so).
We cover every part of the BN9 postcode area for external mastic and the streets around it. You’ll find streets such as Brookside and Lewes Road, and we cover them all. If you’re just outside Piddinghoe, we cover South Heighton (1 mile east), Denton (1 mile east), Telscombe (2 miles west), Rodmell (2 miles north-west) and Northease (3 miles north-west). Larger places within reach include Eastbourne (11 miles east), Seaford (4 miles south-east), Lewes (5 miles north), Hailsham (10 miles east), Uckfield (11 miles north) and Polegate (9 miles east).
What’s near Piddinghoe
In Piddinghoe, that means homes and buildings near The Jolly Boatman pub, UTC@Harbourside and Castle Hill and the streets around them. The closest station to Piddinghoe is Newhaven Town station, about 1.2 miles south-east of the centre. Other landmarks nearby include Planet Earth Museum (0.8 miles south-east) and Lewes Castle (4.7 miles north). Green spaces nearby include Itford Hill and Southerham Farm.
How we quote for external mastic
Every job gets its own quote. These are the things that affect it:
- Any mould that needs treating
- Working hours on commercial sites
- Whether the work is at height
- The product the joint needs
What you pay reflects the work, not a rough estimate. That is why we ask a few questions first and agree the price before starting.
What to tell us for a quote
There’s no need for technical detail. Just tell us:
- Roughly how big the job is
- Whether it has been sealed before
- The address or postcode of the job
- Any access issues, like height or stairs
We quote each job on its own, so the first step is telling us about yours. Just phone 0345 464 0079 or drop us an email with the details.
When it is not the sealant
Some problems need a builder, plumber or other trade rather than us:
- Structural movement, which needs a surveyor or engineer
- Cracking across the wall rather than at a joint
- Failed render or damaged cladding panels
If you are not sure, just ring 0345 464 0079 or email us and we’ll give you a straight answer before you book.
What we seal
- Copings & trims
- Render & cladding joints
- Concrete & block
- Brickwork movement joints
- Façade panels
- Joints between brick and frames
Aftercare tips
To keep the joints looking good and working properly:
- Leave the joints unpainted unless we’ve said otherwise
- Look over the joints every year, ideally after winter
- Tell anyone working on the walls about the movement joints
- Keep soil, plants and ivy away from the joints
Only paint over the joint if we’ve confirmed the sealant can take paint. Paint can crack on a flexible joint.
An open movement joint lets rain into the wall every time it pours. That can lead to damp patches, staining and frost damage which cost more to put right than the joint.
Also near Piddinghoe
Other services in Piddinghoe
What the job involves on each surface
Brickwork movement joints
Clay brickwork grows slightly over its life and moves with the weather. That movement goes into the joint, so the sealant in it must stay soft and stretchy.
Joints between dissimilar materials
Different materials may need different primers. Both surfaces are cleaned and primed as the product requires.
Why it’s worth doing now in Piddinghoe
An open joint keeps letting water into the wall with every downpour. In cold weather, frost can damage wet brick and render, so the problem grows beyond the joint itself. Around Piddinghoe, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed, plus any working-time requirements on site. Call for a quick quote and we will explain what it covers.
Why choose Mr Mastic in Piddinghoe
- White, clear, grey or another colour, product permitting
- An ARBOMaster approved applicator
- Every job guaranteed for a year
- Full insurance on every job
How the visit works
Good joint work is mostly preparation, so that’s where we spend the time. Every joint is cleaned and dried before new material goes in. In total, it generally takes a few hours to a few days, depending on the length of joint and the access. For a village or hamlet like Piddinghoe, the journey is planned in advance: 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.
- First we look over the joints with you, agree which to renew and talk through access.
- Old sealant and any debris are cut and raked out.
- We clean both faces of the joint and prime them where the product calls for it.
- Backing rod goes in next, setting the depth and keeping the sealant off the back of the joint.
- The new sealant, chosen to suit the brick or render, is applied and tooled to a neat finish.
Before we arrive
- Let us know if you’ve seen damp or leaks
- Clear the area around the work
- On commercial sites, let us know about site rules
Get a quote
Want a quote for external mastic? Please phone 0345 464 0079 or drop us an email and tell us about the job. We’ll explain what we’d do and give you a clear price before any work starts.
Related advice
What we’re called out for in Piddinghoe
Poor preparation causes many early failures: joint faces that were dusty or damp, unprimed where they needed it, or still carrying old sealant. The sealant never bonds properly.
These are the problems we’re asked about most:
- Rigid filler in a joint that should flex
- Water getting into walls through failed joints
- Weeds or debris growing in open joints
- Joints where the bead has come unstuck
Managing a site like Breakwater Academy? Then its movement joints, gutters and trims need looking after like any other building’s.
Comparing quotes
- What happens if the job turns out different
- What the cure time is
- What guarantee comes with the work
- Whether you can choose the colour
Questions from Piddinghoe
Do you cover smaller places like Piddinghoe?
Yes, we do. Our work covers London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
I let a flat near Newhaven Town station. Can you help?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. Just ring 0345 464 0079 or send us an email with the address and what needs doing, and we will give you a clear quote.
Do you hold any approvals?
Yes. We’re approved under the ARBOMaster scheme.
How long does the job take?
It depends on the size of the job, but as a guide it takes anything from a few hours to several days, depending on the building. We will give you a better idea when we quote.
Does someone need to be in?
That depends on where the joints are. For work indoors, someone needs to let us in, while outside work can sometimes be arranged differently.
Do you seal joints where cladding meets other materials?
Yes. Materials like render, brick, metal and uPVC all move differently, so the joint between them must be flexible. The sealant is matched to both sides.
What do you put in the joint?
The product depends on the job: anti-fungal sanitary silicone in wet areas, and other sealants where joints move or face the weather. We use products from Arbo and Everbuild.
Where is Mr Mastic based?
We work from Crawley. We cover Piddinghoe and the rest of East Sussex, along with the rest of our area.