West Sussex · England
Runcton New Build Mastic
Plot mastic for developers and snagging failed sealant in new homes for homes and businesses in Runcton and across West Sussex. Fully insured, ARBOMaster approved and guaranteed for a year.
- Frame joints opening as the plaster dries
- Messy sealant that spoils new finishes
- Skirting joints opening in the first winter
Do you need new build mastic in Runcton?
Baths and trays settle under load once the home is lived in. A bath sealed empty drops slightly when filled, straining the joint.
These are the problems we’re asked about most:
- Sealant that never bonded to the surface
- Second-fix sealing on new plots
- Messy sealant that spoils new finishes
- Cracked sealant around new window and door frames
Around Runcton, as everywhere, new build mastic is only as good as the preparation behind it.
What your quote should include
- Whether you can choose the colour
- Whether they’re fully insured
- Who turns up on the day
- Is the old sealant removed completely?
New build mastic in Runcton, done properly
A new house keeps drying out and settling for its first couple of years. Timber dries and shrinks, and baths and trays settle, and sealant applied in a hurry at handover can split. We work on plot handovers, windows & doors and show homes, and common reasons people get in touch are sealant that never bonded to the surface and gaps opening as the house dries out and settles.
Somewhere as small as Runcton, new homes tend to be conversions, self-builds or a few houses rather than an estate. Every one needs its sealant and floor joints done properly, whatever the size of the site.
A one-year guarantee comes with the work, just as it does everywhere we cover.
- Where
- Runcton (PO20)
- Wider area
- West Sussex
- Cover
- A year, on every job
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
How we quote for new build mastic
For a quick quote, just ask. What matters most is:
- The product the joint needs
- Working hours on commercial sites
- Whether the work is at height
- How much old sealant there is and how hard it is to remove
Homes and businesses are quoted the same way: how much there is to do, how we reach it and what it needs, along with when we can work on site. Ask us for a quote and we’ll explain what it covers.
Asking for a quote
To help us quote quickly, let us know:
- If it’s domestic, commercial or a hotel
- Any access issues, like height or stairs
- What’s wrong with the joints now
- The address or postcode of the job
To get a quote, ring 0345 464 0079 or email us and tell us where the job is and what the problem looks like. You’ll have a clear quote before any work starts.
Work for landlords, hotels and businesses
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
We also work for property managers and facilities teams in Runcton and across West Sussex. Several sites can go on one quote, and we’re fully insured for the work.
Places near Runcton
Other services in Runcton
Should I try it myself first?
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.
The biggest DIY mistake is sealing over old sealant. New silicone won’t bond to old, so it lifts and traps water and mould underneath. Everything old must be removed first.
New build mastic around Runcton
Runcton is within about 3 miles of the coast. New homes near the sea put their outside mastic to work from day one, so it’s worth checking at snagging. Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
For new homes near Chichester station, it’s worth checking the sealant early, while snags are still fresh.
Runcton is about 2 miles south-east of Chichester, in West Sussex. Anywhere in PO20, we cover new build mastic for homes and businesses. We cover 371 towns and villages across West Sussex. Our Portsmouth page covers work nearby.
Work in PO20 works the same way as everywhere else we cover. Whether your property is on Goodwood Gardens, Brookside and Lagness Road or anywhere close by, we can help. We also cover the places around Runcton: North Mundham (1 mile west), Merston (1 mile north-east), Lagness (1 mile south-east), Hunston (1 mile west) and Portfield (2 miles north). Further out, we also cover Worthing (15 miles east), Bognor Regis (3 miles south-east), Selsey (6 miles south), Littlehampton (9 miles east), Emsworth (9 miles west) and Rustington (10 miles east).
Around Runcton
Locally, jobs take us to homes and businesses close to Chichester High School For Girls and the streets around them. For rail, the closest station is Chichester station, about 1.9 miles north-west. Nearby you’ll also find Chichester Castle (2.1 miles north-west) and The Chichester City Museum (2 miles north-west).
Runcton questions
Do you cover Runcton for new build mastic?
Yes. We work across London and the South East, and Runcton is part of that. Just ring 0345 464 0079 or send us an email with a few details of the job, and we will send you a clear quote.
Do you cover smaller places like Runcton?
Yes, smaller places are covered as well as towns. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Are you ARBOMaster approved?
Yes. We are approved under the ARBOMaster scheme, which is run for the Arbo sealant brand.
Is it worth trying it myself?
Sometimes. Preparation is everything: all the old sealant out, and a clean, dry joint. If it doesn’t work out, we can redo it.
Do you take on second-fix sealing for builders?
Yes. We take on second-fix sealant work across new plots. Good preparation keeps snagging to a minimum.
Can I send you my snagging list?
Yes. Snagging lists are a common starting point for us. We agree the sealant items with you before any work starts.
Do the sealants smell?
Some sealants have a smell while they cure, which fades as it sets. Opening a window helps.
How long should I leave it?
Most sealants are touch-dry well before they’re fully cured. We will give you the cure time for the product we used before we leave.
Different surfaces, different methods
Show homes
We seal show-home bathrooms, kitchens and frames ready for viewings. Tell us when the home is open so we can plan around it.
Plot handovers
Taking time over preparation reduces return visits. We clean out building dust before sealing and primer used where needed.
How the visit works
On the day, there’s very little for you to do. Point us to the joints and we will get on with it. The job generally takes a few hours in a single home. Somewhere like Runcton 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 any work starts.
- 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.
- The finished joints are checked and the cure times given.
How to prepare
- Tell us if parking is tricky
- For business premises, tell us about site rules or sign-in
- Tell us about any water getting in
How to 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 talk you through what we’d do. Whenever you’re ready, call 0345 464 0079 or email us.
Related advice
Keeping the joints in good condition
To keep the joints looking good and working properly:
- Keep photos and emails about snagging items
- Ventilate bathrooms well, especially in the first year
- Report sealant problems to your builder during the snagging period
- Wait for the cure time before using a resealed shower
Watch the joints as the house settles. Hairline gaps can open as timber and plaster dry, and they’re simple to reseal once movement has slowed.
The sooner you deal with untidy or cracking sealant, the less there is to put right. Small faults turn into leaks if left in a busy bathroom.