East Sussex · England
Duddleswell External Mastic
Professional external mastic in and around Duddleswell, with old sealant always removed completely and a 12-month guarantee.
- Sealant pulling away from one side of the joint
- Panel joints letting water in
- Cracked joints where brick meets render or frames
What external mastic looks like in Duddleswell
The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Around Duddleswell, as everywhere, external mastic is only as good as the preparation behind it. Letting a property close to Buxted station? Then split movement joints are easy to miss on a rental until damp shows inside.
Duddleswell is about 3 miles west of Crowborough, in East Sussex. For external mastic in and around Duddleswell, please call 0345 464 0079 or drop us an email for a quick quote. We cover East Sussex from our Crawley base, Duddleswell included. Duddleswell is one of 289 places in East Sussex we cover. Our Crawley page covers work nearby (13 miles or so).
Jobs for external mastic in TN22 works the same way as everywhere else we cover. If you’re just outside Duddleswell, we cover Nutley (2 miles west), Horney Common (2 miles south), Chelwood Gate (3 miles west), Chelwood Common (3 miles west) and Wych Cross (3 miles north-west). We also work in nearby towns such as Lewes (12 miles south), Hailsham (14 miles south-east), Crowborough (3 miles east), Uckfield (5 miles south), South Malling (12 miles south) and Heathfield (9 miles south-east).
Landmarks near Duddleswell
The closest station to Duddleswell is Buxted station, about 3.8 miles south-east. Nearby you will also find Crowborough War Memorial Hospital (3 miles east). Open spaces near Duddleswell include Brickfield Meadow.
External mastic for homes and businesses in Duddleswell
Ground-floor and low-level joints are straightforward to reach. Where joints are higher up, tell us about the building when you get in touch and we will confirm what access is needed. If you are dealing with joints with sealant missing in places and weeds or debris growing in open joints, we can help, on joints between brick and frames, façade panels and copings & trims alike.
In a village or hamlet like Duddleswell, older cottages and farm buildings often stand in the open, 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.
You get a 12-month guarantee, the same in Duddleswell as everywhere else we work.
- Where
- Duddleswell (TN22)
- Wider area
- East Sussex
- Guarantee
- 12 months on all our work
- Quotes
- A clear price before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Different surfaces, different methods
Cladding and façade panels
Metal and composite panels move a lot with temperature, so the joints work hard every day. The sealant is chosen with that in mind.
Brickwork movement joints
Brick moves with heat and moisture, and grows a little over time. That movement goes into the joint, so its sealant has to stay flexible.
For landlords and businesses
We also work for property managers and facilities teams in Duddleswell and across East Sussex. We can quote a run of properties together, and we’re fully insured.
Landlords and agents in Duddleswell can book us as well as householders. Resealing between tenancies is a simple way to keep a property in good order before the next move-in.
What we do, step by step
Every visit runs the same way: we look at the joints together, mask and protect the surrounding surfaces, carry out the job and tidy away. Most jobs take anything from a few hours to several days, depending on the building. For a village or hamlet like Duddleswell, the journey is planned in advance: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- 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.
- Primer is applied wherever the sealant needs it.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Preparing for the visit
- Mention any sign-in or site rules at work premises
- Tell us about any water getting in
- Move anything stored near the joints
Get a quote
Quotes start with a quick conversation. Describe the problem, the location and the size of the job, and we will explain how we’d tackle it. When it suits you, phone 0345 464 0079 or send us an email.
Advice
Duddleswell questions
I let a flat near Buxted station. Can you help?
Yes. We work for landlords and agents as well as homeowners. You can phone 0345 464 0079 or drop us an email with the details for a clear quote.
Will you come out to Duddleswell?
Yes, we do. We work across London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
Should I try DIY first?
That depends on the joint. 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 do you reach high-level joints?
Each building is different. Tell us the height, the number of joints and what’s below them and we will confirm how they can be reached safely.
When is the sealant fully cured?
Different products cure at different speeds, so please follow the time we give you.
Do you seal joints where cladding meets other materials?
Yes. We cut out the old sealant, prepare both faces and reseal with a flexible exterior product. The colour is chosen to suit.
Is there any odour?
Some sealants have a smell while they cure, but it fades. Opening a window helps.
Will you leave a mess?
Very little: the area around the joints is protected first, and we tidy up before we go.
DIY sealant or a professional job?
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
Also near Duddleswell
More services for Duddleswell
Why it’s worth doing now in Duddleswell
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 Duddleswell, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
Doing several joints on one visit is usually more efficient than separate visits, so tell us about everything that needs sealing. You’ll get one clear quote for the whole job.
Why us?
- White, clear, grey or coloured to suit, where the product allows
- Tidy, careful work
- An ARBOMaster approved applicator
- We never seal over old sealant
Looking after it afterwards
To keep the joints looking good and working properly:
- Have failed joints looked at early
- Fix overflowing gutters above sealed joints
- Make sure movement joints aren’t pointed over
- Leave the joints unpainted unless we’ve said otherwise
Give the sealant the cure time we tell you before anything rubs against it. The surface skins over quickly, but full cure takes longer.
Small splits are the time to act. At that stage it’s a simple cut out and reseal before water has had years to get in.
When it isn’t the sealant
Honest advice matters more to us than a booking, so here’s what new sealant will not do:
- Loose or hollow render, which needs re-rendering
- Cutting new joints into brickwork, which is building work rather than sealant work
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
If in doubt, ring 0345 464 0079 or send us an email and we’ll say what we think.
What we seal
- Render & cladding joints
- Joints between brick and frames
- Brickwork movement joints
- Concrete & block
- Façade panels
- Copings & trims