East Sussex · England
Window Mastic in Dukes Green
Problem with your window and door frames in Dukes Green? We cut out the old, prepare the joints and apply the right sealant.
- Water coming in at the bottom corners of a door
- Gaps between the frame and the inside reveal
- Cracked or shrunken mastic around the frame
Window mastic for homes and businesses in Dukes Green
Mr Mastic’s applicators have more than 20 years’ experience with window and door sealants. We’re ARBOMaster approved and fully insured, and every job is covered by a 12-month guarantee. Typical jobs include water coming in at the bottom corners of a door and draughts coming in around windows and doors, across window sills, timber windows & doors and uPVC windows.
Outdoor sealant needs dry, clean surfaces, so work on frames around Dukes Green is planned for dry weather. Tell us about access to every side of the house, including upper-floor windows.
The work is guaranteed for twelve months. If there’s a problem with our work within the year, let us know and we will sort it.
- Location
- Dukes Green (BN26)
- Wider area
- East Sussex
- Guarantee
- A year, on every job
- Quote
- A clear price before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Looking after it afterwards
Looking after new joints is easy, and it makes a real difference:
- Air rooms to keep condensation down around windows
- Look round the frames every year or so
- Wash the frames with mild soapy water
- Avoid harsh chemicals near the mastic
Timber frames need their paint kept up, since wood that gets wet swells and shrinks more. Paint up to the joint, not over the silicone.
Look out for the warning signs: cracks in the mastic, gaps you can see light through, damp on the reveal or mould around the inside of the frame. If you notice one, it’s time to get the joint looked at.
What happens if it’s left?
The work is quick compared with the damage it prevents: the visit takes anything from an hour or two to a full day, depending on how many frames there are. Wait for damp to appear and there may be plaster and decorating to sort out too. Older cottages and farmhouses around Dukes Green can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
Homes and businesses are quoted the same way: the amount of work, the access and the products needed. Call for a quick quote and we will explain what it covers.
Why choose Mr Mastic in Dukes Green
- Full insurance on every job
- 20+ years of sealant experience
- A 12-month guarantee on all work
- Domestic, commercial and hotel work
Read our cost guide and what customers say.
Should I try it myself first?
A DIY attempt does not rule out a professional job. We remove it and do the joint properly, so just mention it when you contact us.
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.
Places near Dukes Green
Other services in Dukes Green
The process
We keep the work tidy and contained to the joints we are treating, so you can carry on as normal. The job usually takes a morning for a couple of windows and a door, and we explain the cure time before we leave. Somewhere like Dukes Green needs a little journey planning: 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.
- Each frame is looked over and we agree which ones need resealing.
- We remove the old mastic and clean the frame edge and wall.
- Where the gap is deep, backing rod goes in first.
- The new sealant goes on in white, brown, anthracite grey, black or clear to suit.
- Every joint is tooled smooth and checked before we leave.
How to prepare
- Mention if the joints have been sealed before
- Tell us if parking is tricky
- Mention any sign-in or site rules at work premises
Getting a quote
Asking for a quote is easy: let us know the job and the location. A few photos by email make the job easier to understand.
Advice
How the job changes by surface
Composite doors
If the door itself is draughty, the issue may be the door seals or hinges rather than the frame mastic. We will tell you if that is what we find.
Timber windows & doors
Soft or rotten wood can’t be sealed successfully. If we find rot, we’ll tell you before going ahead, as that is a job for a joiner.
Dukes Green questions
Do you cover smaller places like Dukes Green?
Yes, we do. Our work covers London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Do you work for landlords with property near Berwick (Sussex) station?
Yes, rental work is part of what we do. Just call 0345 464 0079 or email us and tell us about the property, and we will send you a clear quote.
Is there any odour?
Sometimes, a little. It fades as the sealant cures.
Do you take out the old sealant first?
Yes. All of the old material is cut out and the joint cleaned before resealing.
Is the work guaranteed?
Yes. Every job comes with our one-year guarantee, and we’re ARBOMaster approved applicators.
Does someone need to be in?
It depends on the job. For work indoors, someone needs to let us in.
Is the new sealant paintable?
Not if it’s silicone. We choose the product with your decorating in mind, so mention it when you book.
Can you reach windows above the ground floor?
Normally, yes. We plan safe access before the job.
Landlord and commercial work in Dukes Green
In hotels, rooms out of use cost money, so we plan the work room by room. We’ve worked in hotels as well as homes and businesses.
We regularly work with letting and managing agents. Tell us the address, the job and how access works and we will quote.
Dukes Green homes and the weather
Dukes Green is close to the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. Both are hard on the mastic around window and door frames, which can dry out and crack sooner where a building faces the weather. Historic houses like Alfriston Clergy House (about 0.5 miles north-east) are a reminder that the area around Dukes Green has older buildings as well as new. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window.
For site and facilities teams at buildings such as Alfriston School, the mastic around its windows and doors needs looking after like any other building’s. Letting a property close to Berwick (Sussex) station? Then sound mastic around windows and doors keeps out the draughts and damp that tenants notice first.
Dukes Green is about 3 miles north-east of Seaford, in East Sussex. Dukes Green gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a 12-month guarantee. We cover 289 towns and villages across East Sussex, large and small. You can also see our page for Brighton, about 13 miles away.
We cover every part of the BN26 postcode area for window mastic and the streets around it. Other places close to Dukes Green include Lullington (1 mile north-east), Alfriston (1 mile north), Winton (1 mile north), Milton Street (1 mile north-east) and Alciston (2 miles north). Further out, we also cover Eastbourne (6 miles east), Bexhill-on-Sea (14 miles east), Seaford (3 miles south-west), Lewes (8 miles north-west), Hailsham (6 miles north-east) and Uckfield (12 miles north).
Local landmarks in Dukes Green
In Dukes Green, that means homes and buildings near Dean's Place Hotel and the streets around them. The nearest railway station is Berwick (Sussex) station, about 2.8 miles north of the centre. Nearby you will also find Chailey Heritage Marine Hospital (3.8 miles west) and Arlington Castle (1.2 miles north-east). The countryside around Dukes Green includes Firle Beacon.
Signs you need window mastic in Dukes Green
Sun, frost and rain wear sealant out. UV light hardens the outside of the bead, until it loses its stretch and starts to crack.
Any of these means the joints need attention:
- Cracked internal joints between frame and plaster
- Whistling draughts around closed windows
- A bead that doesn’t match the frame
- Gaps left after new windows were fitted
In the older streets around The Parish Church of St Michael the Archangel, the joint between an old wall and a newer frame is generally the first place rain gets in.
Questions to ask before booking
- How the surfaces are prepared before sealing
- Is the old sealant removed completely?
- How long to leave it before use
- Whether you can choose the colour