East Sussex · England
Sand mastic for sash & case windows in Dukes Green, East Sussex
Sand mastic for Dukes Green and the surrounding area: careful preparation, the right product and tidy work. Call for a quick quote.
- Draughts and rain around sash boxes
- Open joints round the window box
- Mastic dropping out of the joint
How we handle sand mastic in Dukes Green
On many period windows, sand mastic looks right and suits the building. On modern frames we’d normally use a flexible sealant, and we’ll talk through which suits your home. Common call-outs are for gaps where the frame meets the masonry and mastic worn away on windows facing the weather, across tenement windows, period & listed homes and brick reveals.
Homes in small places like Dukes Green often stand in the open, with little to shelter their windows from wind and rain. That exposure dries out and cracks the mastic around frames and sills faster.
We stand behind the work with a 12-month guarantee.
- Location
- Dukes Green (BN26)
- Region
- East Sussex
- Guarantee
- A year, on every job
- Price
- A clear quote up front
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
How the visit works
Most of a good job is in the preparation, and we do not rush it. Every joint is cleaned and dried before new material goes in. All told, the work takes anything from a few hours to a full day, depending on how many windows. In a small place like Dukes Green, access is generally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- Each surround is checked first.
- The joint is raked out and cleaned.
- We fill deep gaps so the new mastic isn’t too thick.
- New sand mastic is applied and shaped by hand.
- The finish is dressed neatly.
How to prepare
- Move anything stored near the joints
- Tell us about any water getting in
- Mention any tricky access
Get a quote
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is, and we’ll explain how we’d tackle it. Whenever you’re ready, ring 0345 464 0079 or send us an email.
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Landlord and commercial work in Dukes Green
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
From a single let to a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a one-year guarantee.
Towns and villages near Dukes Green
More services for Dukes Green
Why deal with it now?
A silicone bead can be quicker, but on period stone or brick it often looks out of place. Sand mastic suits the building and blends with the stone or brick. Where a wall is exposed, as many are in small places like Dukes Green, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
Every job is a little different, so each one gets its own quote. Size, access and the product the joint needs all make a difference.
Why Dukes Green clients choose us
- More than 20 years in sealant work
- Anti-fungal silicone where joints get wet
- 180+ five-star Google reviews
- An ARBOMaster approved applicator
Take a look at what affects the cost or customer reviews.
Should I try it myself first?
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is, then guaranteed for a year.
Your questions about sand mastic in Dukes Green
Will you come out to Dukes Green?
Yes, Dukes Green is covered. We work across London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Does the coastal weather in Dukes Green affect outside sealant?
Coastal weather is harder on outside sealant: there’s more wind-driven rain and, closer to the shore, salt in the air. Choosing the right sealant for the frame and wall, laid at the right depth, helps it last.
Which products do you use?
It depends on the joint: anti-fungal sanitary silicone in wet areas, and other sealants where joints move or face the weather. Brands we use include Arbo and Everbuild.
Which is right for my windows, sand mastic or modern sealant?
It depends on the window. On many period windows, sand mastic looks right and suits the building, while modern frames normally get a flexible sealant.
Is consent needed for window work on a listed home?
Speak to your local planning authority before work starts. Like-for-like sand mastic is often the preferred finish but the decision is theirs.
Can I paint the new mastic?
Traditional guidance is not to paint over sand mastic. Ask us before you decorate around it and we’ll talk you through it.
Are you insured?
Yes. We are fully insured.
Can I choose the sealant colour?
Yes. Sealants come in white, clear, grey and other colours for many products, and we agree the colour with you before we start.
What sand mastic looks like in Dukes Green
Dukes Green is close to the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. That’s hard on the mastic around older windows and doors, especially on the side facing the sea. Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Schools such as Alfriston School are buildings too, and its window and door frames need their mastic kept sound, just like a home’s. For an older house near a landmark such as The Parish Church of St Michael the Archangel, frames set in older brick or stone need a sealant that suits the wall as well as the frame. Rented homes near Berwick (Sussex) station change hands often, and cracked sand mastic around sash windows lets in the draughts tenants complain about.
Dukes Green is about 3 miles north-east of Seaford, in East Sussex. If you need sand mastic in Dukes Green, please ring 0345 464 0079 or drop us an email for a quick quote. We’re based in Crawley and cover East Sussex, Dukes Green included. Across East Sussex, we cover 289 places, Dukes Green among them. For nearby work, see our Brighton page.
We work across BN26 for sand mastic. 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). Within a short drive, 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).
Landmarks near Dukes Green
Locally, jobs take us to homes and businesses close to Dean's Place Hotel and the streets around them. Dukes Green’s nearest station is Berwick (Sussex) station, about 2.8 miles north of the centre. Other landmarks nearby include Chailey Heritage Marine Hospital (3.8 miles west) and Arlington Castle (1.2 miles north-east). For a walk, there’s Firle Beacon.
When something else is needed
We’d rather tell you now than do work that won’t last, so these are the limits:
- Sashes that rattle, stick or will not open
- Broken panes
- Masonry that needs repairing
Not sure which it is? You can ring 0345 464 0079 or drop us an email and we will tell you honestly before you book.
Joints and surfaces we work on
- Tenement windows
- Period & listed homes
- Sash and case windows
- Timber door frames
- Stone surrounds
- Brick reveals
What affects the quote in Dukes Green
Call for a quick quote. What matters most is:
- How many areas need sealing
- The type of sealant required
- Mould in or behind the old joints
- How much old sealant there is and how hard it is to remove
Commercial jobs are quoted on the same basis as homes: the amount of work, how we reach it and what it needs, plus any working-time requirements on site. Call for a quick quote and we will go through it with you.
What to tell us for a quote
What to tell us when you ask for a quote:
- What’s wrong with the joints now
- Access, such as stairs, a lift or height
- The rough size of the job
- The type of property
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints.
Aftercare tips
Good habits help new joints last longer. Our tips:
- Avoid patching sand mastic with silicone
- Look over the window mastic once a year
- Renew mastic before redecorating the windows
- Go gently near the mastic when preparing windows
Leave the new mastic unpainted, as traditional guidance advises. If you are redecorating, ask us first.
Fine cracks show the mastic is starting to fail. It’s easier to renew it before it drops out.