West Sussex · England
Hunston New Build Mastic
Problem with your new-build sealant joints in Hunston? We remove the old material, prepare the joints and seal them properly, and the work is guaranteed for a year.
- Gaps opening as the house dries out and settles
- Sealant applied over dusty or wet surfaces
- Cracked caulk along new skirting
DIY versus a professional finish
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.
New build mastic in Hunston, done properly
Some new-home owners let the house settle before resealing. That makes sense for small gaps that are just cosmetic, but a failed shower or bath seal shouldn’t wait. If you have beads laid onto grit and dust from the build and worktop and upstand sealant coming away, we can help, on bathrooms & en suites, show homes and skirting & floors alike.
Around Hunston, older homes often have timber floors that move through the year, which is why skirting and threshold joints need a flexible sealant, not filler.
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
- Hunston (PO20)
- Region
- West Sussex
- Guarantee
- A year, on every job
- Price
- A clear quote up front
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Work for landlords, hotels and businesses
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance.
Housing providers, facilities teams and property managers book us too. Several sites can be quoted together, and we’re fully insured.
How it works
Once we are on site, we check the joints match what you told us. If anything is different, we explain it before carrying on. After that, the work takes anything from a few hours to several days, depending on the number of plots. Somewhere as small as Hunston, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- 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.
- Baths are filled with water, then the new sealant is applied.
- We check every joint and leave you with the cure times.
Before we arrive
- For indoor joints, keep the area dry beforehand if you can
- Tell us about any previous sealing or DIY attempts
- Mention any tricky access
How to get a quote
We quote each job on its own, so the first step is telling us about yours. Just phone 0345 464 0079 or send us an email with the details, and photos are welcome.
Advice
When it is not the sealant
In fairness, there are a few things sealant will not fix:
- Cracking that points to a structural problem
- Disputes or warranty claims with your builder
- A tray or bath that is not properly supported, until it’s fixed
If you’re not sure, just phone 0345 464 0079 or email us and we will give you a straight answer before booking.
Joints and surfaces we work on
- Windows & doors
- Bathrooms & en suites
- Show homes
- Kitchens
- Plot handovers
- Skirting & floors
Looking after it afterwards
Aftercare is simple:
- Avoid running a DIY bead over the old one
- Follow the cure time we give you
- Photograph failed sealant before it’s redone
- Act quickly if a seal starts to leak
Ventilation matters in a new home, which is still drying out. Use the extractor fan or open a window after showers so moisture doesn’t sit on the sealant.
Leave a failed new-build seal and water can reach the floor and the ceiling below. Early resealing keeps the job small and protects the rest of the house.
Places near Hunston
Other services in Hunston
New build mastic in Hunston: local notes
Hunston is close to the coast. New homes near the sea put their outside mastic to work from day one, so any gaps are best picked up early. 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.
If you’ve bought a new home near Chichester station, the sealant around baths, showers and frames is worth checking in the first year or two.
Hunston is about 2 miles south of Chichester, in West Sussex. Anywhere in PO20, we cover new build mastic for homes and businesses. Hunston is one of 371 places in West Sussex where we work for new build mastic. For nearby work, see our Portsmouth page (13 miles or so).
We work across PO20 for new build mastic. Whether your property is on Heath Close, Westlands Road and St Leodegars Way or a nearby road, we can help. Other places close to Hunston include Donnington (1 mile west), North Mundham (1 mile east), Runcton (1 mile east), Portfield (2 miles north) and Chichester (2 miles north). Further out, we also cover Bognor Regis (4 miles east), Selsey (5 miles south), Littlehampton (11 miles east), Emsworth (8 miles west), Rustington (12 miles east) and Angmering (13 miles east).
Local landmarks in Hunston
In Hunston, that means homes and buildings near Chichester High School For Girls and The Spotted Cow Public House and the streets around them. The closest station to Hunston is Chichester station, roughly 1.5 miles north of the centre. Well-known places in the area include St Richard's Hospital (2.3 miles north) and Chichester Castle (2 miles north).
Do you need new build mastic in Hunston?
Once people move in, baths and trays take weight and bed down. If a bath wasn’t filled when it was sealed, the bead is stretched the first time it’s used and the sealant may split.
These are the problems we are asked about most:
- Beads laid onto grit and dust from the build
- Skirting joints opening in the first winter
- Leaking shower tray seals in a new home
- Gaps behind new kitchen upstands
Around Hunston, as everywhere, new build mastic is only as good as the preparation behind it.
What your quote should include
- How long the guarantee is
- Whether the sealant suits the joint
- Whether all the old sealant comes out first
- Whether VAT is included
Questions from Hunston
Can you help a landlord with a rental near Chichester station?
Yes, we work for landlords and agents. Just phone 0345 464 0079 or send us an email and tell us about the property, and we will send you a clear quote.
Is Hunston within the area you cover?
Yes, smaller places are covered as well as towns. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
How much does new build mastic cost in Hunston?
Size, access and the old material all affect the cost. Call for a quick quote.
Is it messy?
No. We protect the surfaces around the joints, and we tidy up before we go.
Why does sealant fail so quickly in new builds?
There are normally two causes: the house moving as it dries, and sealant that never bonded properly. Cutting it out and resealing properly fixes both.
Are you ARBOMaster approved?
Yes. We’re an ARBOMaster approved applicator, the approved applicator scheme for Arbo sealants.
What sealant do you use?
Quality sealants from brands including Arbo and Everbuild, picked for each joint. We explain the product when we quote.
Should I go to my builder first?
While the snagging or warranty period runs, the builder should be your first contact. If it isn’t sorted, or keeps failing, get in touch with us.
Surface by surface
Windows and doors
Draughts around new frames are often a sealant gap. We check and reseal the frame edges.
Kitchens
Worktops in new homes can move slightly as the house dries, opening gaps behind the upstand. We reseal them with a flexible sealant.