West Sussex · England
Duncton New Build Mastic
Plot mastic for developers and snagging failed sealant in new homes for homeowners, landlords and businesses in Duncton. Fully insured, ARBOMaster approved and guaranteed for a year.
- Cracked sealant around new window and door frames
- Sealant that never bonded to the surface
- Worktop and upstand sealant coming away
About our new build mastic in Duncton
Failed shower seals, gaps along the skirting and messy beads are common items on a new-home snagging list. While the builder’s snagging or warranty period runs, report it to them first, and if it isn’t put right, get in touch with us. We work on bathrooms & en suites, show homes and windows & doors, and common reasons people get in touch are new-build shower sealant that has already split and joints pulling apart as timber shrinks.
Around Duncton, older homes often have timber floors that move through the year, so skirting and threshold joints need a flexible sealant rather than a rigid filler.
A 12-month guarantee comes as standard, so you are not left on your own once the job is done.
- Location
- Duncton (GU28)
- Region
- West Sussex
- Guarantee
- One year on every job
- Quotes
- A clear quote up front
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
New homes and floors in Duncton
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.
Around Duncton, as everywhere, new build mastic is only as good as the preparation behind it.
Duncton is about 10 miles north-east of Chichester, in West Sussex. From the centre of Duncton to the outskirts, new build mastic is available for homes and businesses alike, from flats and houses to offices and hotels. 371 places in West Sussex are on our list, large and small. Our Crawley page covers work nearby.
Postcode districts we cover here for new build mastic: GU28. Whether your property is on Duncton High Street and Willett Close or a nearby road, we can help. We also cover the places around Duncton: East Lavington (1 mile south-west), Sutton (2 miles south-east), Rotherbridge (2 miles north), Graffham (2 miles west) and Haslingbourne (2 miles north-east). Larger places within reach include Worthing (13 miles south-east), Bognor Regis (11 miles south), Chichester (10 miles south-west), Littlehampton (10 miles south-east), Emsworth (15 miles south-west) and Rustington (11 miles south-east).
Landmarks near Duncton
We work in homes and buildings around The Parish Church of St Peter, among other places. Other landmarks nearby include Midhurst Community Hospital (5.4 miles north-west) and Coultershaw Heritage Site (1.6 miles north-east). Not far away are Bignor Hill and Graffham Common.
Surface by surface
Kitchens
New-kitchen sealant is often applied in a rush. We remove it and reseal with a kitchen-suitable sealant.
Bathrooms and en suites
Baths, showers, basins and trays in new bathrooms are the most common new-build reseal. We cut out the failed bead, clean and prime, and reseal with anti-fungal sanitary silicone.
How to look after the new joints
So the new joints stay in good condition:
- Wait for the cure time before using a resealed shower
- Get a leaking seal dealt with right away
- Resist patching a failed seal with a tube from the DIY shop
- Keep photos and emails about snagging items
Keep an eye on the joints over the first couple of years. Small gaps can appear as the house dries and can be resealed later.
Do not let the snagging period run out with sealant problems unreported. After that, putting it right may fall to you, so raise it early.
Landlord and commercial work in Duncton
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements.
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
When something else is needed
We will always be straight with you, so here’s what sealant can’t fix:
- Leaks from pipes, valves or wastes, which need a plumber
- Cracked trays, tiles or worktops
- Structural cracks in walls or ceilings
Not sure which it is? You can call 0345 464 0079 or send us an email and we will tell you honestly before booking.
Where we work in Duncton
- Windows & doors
- Plot handovers
- Skirting & floors
- Bathrooms & en suites
- Kitchens
- Show homes
Quotes for new build mastic in Duncton
Some jobs are bigger than they look, and some smaller. The main factors:
- The product the joint needs
- Access and height
- Working hours on commercial sites
- Any mould that needs treating
Every job is a little different, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all play a part.
What we need to know
You don’t need to know the technical terms. Just tell us:
- The type of property
- Pictures of the joints, sent by email
- Any access issues, like height or stairs
- What the problem is, such as mould, gaps, leaks or cracking
For new build mastic in Duncton, phone 0345 464 0079 or drop us an email. A short description of the job and where it is helps us quote, and you’ll get a clear quote before we start.
When to call us in Duncton
Later trades and the final clean can damage fresh sealant. If it’s disturbed before curing, the joint can be left weak, and the problem shows up after you move in.
Any of these means the joints need attention:
- Joints pulling apart as timber shrinks
- Cracked caulk along new skirting
- Internal frame sealant that has split
- Sealant applied over dusty or wet surfaces
Whether the job is in Duncton itself or nearby, the right material for each joint matters as much as a neat finish.
What to look for in a quote
- Is the old sealant removed completely?
- Which sealant they’ll use, and why
- Are they insured?
- What the cure time is
What happens on the day
We work through the job in order: protect, prepare, seal, tidy. Typically it takes anything from a few hours to several days, depending on the number of plots and we leave things clean and tidy. Somewhere like Duncton needs a little journey planning: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- Each joint is checked for movement before work begins.
- Old sealant is cut out and the joints cleaned.
- Joints are dried and primed where the product calls for it.
- New sealant goes in, with baths filled first so they’re at their heaviest.
- We check every joint and leave you with the cure times.
How to prepare
- Mention any parking rules near the property
- Tell us about access, such as stairs, a lift or high-level joints
- Let us know if you’ve seen damp or leaks
How to get a quote
It all starts with a short chat. Describe the problem, the location and the size of the job. When it suits you, phone 0345 464 0079 or email us.
Related advice
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Common questions in Duncton
Is there a guarantee on new build mastic in Duncton?
All our work, in Duncton and everywhere else, comes with a 12-month guarantee. We are also fully insured and ARBOMaster approved.
Will you come out to Duncton?
Yes. Duncton is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
How long will you be here?
That depends on how much there is to do, but as a guide it takes anything from a few hours to several days, depending on the number of plots. We’ll tell you when we quote.
Is it worth resealing while the house is still settling?
It depends on whether water is getting through. A leaking shower or bath seal should be redone straight away, while small cosmetic gaps can wait a while.
Can tenants book the work?
Yes, though it’s best to check with your landlord first. Many landlords are glad to have it sorted.
Will you just run a new bead over the existing one?
No. Fresh silicone does not stick to the old layer, so sealing over the top fails quickly. The old sealant always comes out first.
Do you use white or clear sealant?
Most bathroom joints are white or clear, but other colours are available. We match the colour to the finish and agree it with you.
What information do you need?
Only a few details: where it is, what you’ve noticed and how we reach it. After that, simply call 0345 464 0079 or email us.