Hampshire · England
New Build Mastic in Dean
New build mastic across Dean and nearby, with every bit of old sealant taken out first and a one-year guarantee.
- Sealant that never bonded to the surface
- Cracked sealant around new window and door frames
- Gaps opening as the house dries out and settles
Should I try it myself first?
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
New build mastic in Dean
For builders and developers, we work through plots to the schedule you give us. We seal bathrooms, kitchens, windows, doors and skirting so plots are ready to hand over. We work on plot handovers, skirting & floors and kitchens, and people most often call us about leaking shower tray seals in a new home and cracks appearing as a new home settles.
For a small place like Dean, the journey and access are planned in advance, and once on site, the job is the same as anywhere.
Your job is guaranteed for a year, as with all our work.
- Where
- Dean (SO32)
- Wider area
- Hampshire
- Cover
- A year, on every job
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
The process
Every visit runs the same way: we check the joints, protect the area around them, carry out the job and tidy away. It generally takes a few hours for most snagging lists, longer for a run of plots. Somewhere like Dean 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.
- We start by agreeing which joints are on the list, from the snagging sheet or plot schedule.
- Failed or untidy sealant is cut out completely.
- Each joint is cleaned of dust and grit, then primed if required.
- A sealant chosen for each area goes in and is tooled smooth.
- Each area is checked and left with its cure time.
Getting ready for the visit
- Mention any leaks or damp you’ve noticed
- Clear items away from the joints we are working on
- Tell us if parking is tricky
Getting a quote
We quote each job on its own, so the first step is telling us about yours. Simply ring 0345 464 0079 or drop us an email and describe the job, and photos are welcome.
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Also in Dean
Signs you need new build mastic in Dean
Not every new-build joint gets the right sealant: decorators’ caulk in a wet area, or a stiff sealant where there’s movement. Neither lasts long.
Any of these means the joints need attention:
- Worktop and upstand sealant coming away
- Internal frame sealant that has split
- Skirting joints opening in the first winter
- Cracks appearing as a new home settles
In and around Dean, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint.
Before you book anyone
- Who turns up on the day
- What happens if the job turns out different
- Whether all the old sealant comes out first
- What the quote includes, VAT included or not
New build mastic around Dean
The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
For new homes near Botley station, it’s worth checking the sealant early, while snags are still fresh.
Dean is about 6 miles north-east of Hedge End, in Hampshire. We carry out new build mastic for homes and businesses in Dean, as part of our work across Hampshire. 683 places in Hampshire are on our list. Southampton is on our list too, around 9 miles away.
Our applicators cover all of SO32 for new build mastic. We cover properties on Dean Lane, Little Ashton Lane and Limekiln Lane and the roads around them. If you’re just outside Dean, we cover The Hangers (1 mile east), Upper Swanmore (2 miles south-east), Swanmore (2 miles south), Hill Grove (2 miles south-east) and Droxford (3 miles east). We also work in nearby towns such as Winchester (8 miles north-west), Gosport (12 miles south), Havant (12 miles south-east), Eastleigh (6 miles west), Fareham (8 miles south) and Horndean (9 miles south-east).
What’s near Dean
We work in homes and buildings around Swanmore College of Technology and the streets around them. The nearest railway station is Botley station, roughly 4.6 miles south-west of the centre. Other landmarks nearby include Bishop's Waltham Museum (1.4 miles south-west). The countryside around Dean includes Bishops Waltham Branch LNR and Beacon Hill.
Surface by surface
Show homes
Tired or marked sealant in a show home can be renewed. We cut it out and reseal neatly.
Skirting and floors
New homes often develop a gap between skirting and floor. A flexible sealant closes it without cracking like caulk.
What sealant work cannot fix
It helps to know what we cannot do:
- Movement caused by a poorly fitted tray or bath
- Broken tiles or a split tray
- Settlement cracks that need a surveyor
If in doubt, ring 0345 464 0079 or send us an email and we will say what we think before booking.
Where we work in Dean
- Show homes
- Kitchens
- Bathrooms & en suites
- Plot handovers
- Windows & doors
- Skirting & floors
Landlord and commercial work in Dean
Water getting past a failed joint can damage the building, which matters even more when someone else lives there. Resealing at the right time is simple maintenance.
Whether it’s one flat or a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a one-year guarantee.
Keeping the joints in good condition
Aftercare is simple, and it makes a real difference:
- Don’t seal over failed sealant yourself
- Use the extractor fan every time you shower
- Raise failed sealant with the developer while you are covered
- Keep water off fresh sealant until it has cured
Watch the joints as the house settles. Hairline gaps can open as timber and plaster dry and can be resealed later.
Leave a failed new-build seal and water can reach the floor and the ceiling below. Early resealing keeps the job small and the new finishes intact.
Your questions about new build mastic in Dean
Is Dean in your area for new build mastic?
Yes, Dean is within the area we cover. We work across London and the South East. You can call 0345 464 0079 or email us and let us know what needs doing, and we will give you a clear price.
Will you come out to Dean?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
What do you put in the joint?
Quality sealants from brands including Arbo and Everbuild, chosen to suit the joint. We explain the product when we quote.
Where are you based?
Our base is in Crawley, and we work across South East England, London and Scotland.
I rent my home. Can I book you?
Yes. Ask your landlord first, and we can send them the quote if that helps.
Will there be a smell?
That depends on the sealant. Some smell for a while, some hardly at all.
Do you take out the old sealant first?
Yes. We cut out all the old sealant and clean the joint before applying anything new.
How long should I leave it?
Different products cure at different speeds, so please follow the time we give you when we finish.