Hampshire · England
Dunbridge New Build Mastic
Plot mastic for developers and snagging failed sealant in new homes in Dunbridge, with a 12-month guarantee on every job. Call for a quick quote.
- Internal frame sealant that has split
- Leaking shower tray seals in a new home
- Second-fix sealing on new plots
New build mastic in Dunbridge, done properly
Across Dunbridge, we work for both new-home owners and the builders handing those homes over. Whether it’s one en suite or a run of plots, the method is the same: cut out, clean, prime where needed and reseal neatly. We are often asked to deal with cracks appearing as a new home settles and gaps behind new kitchen upstands, across skirting & floors, plot handovers and bathrooms & en suites.
Older homes in small places like Dunbridge often have timber floors that move with the seasons, so skirting and threshold joints need a flexible sealant rather than a rigid filler.
You get a 12-month guarantee, the same in Dunbridge as everywhere else we work.
- Place
- Dunbridge (SO51)
- Region
- Hampshire
- Guarantee
- 12 months on all our work
- Price
- A clear price before work begins
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Common problems we fix in Dunbridge
Sealant applied onto damp surfaces does not bond well. On a busy site, joints aren’t always given time to dry.
Common reasons people contact us include:
- Cracks appearing as a new home settles
- Sealant work across a run of new homes
- Cracked sealant around new window and door frames
- Gaps between new skirting and floors
For new homes near Mottisfont & Dunbridge station, it’s worth checking the sealant early, while snags are still fresh.
What your quote should include
- What product goes in the joint
- The length of the guarantee
- When the joint can take water or movement
- What insurance they hold
Why deal with it now?
The builder is generally the first port of call while the snagging or warranty period runs. If it’s slow, or the same joint keeps failing, a proper reseal from a specialist is the next step. Older cottages and farmhouses around Dunbridge can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
Some things make a job bigger or smaller: the old material and how easily it comes out, whether mould needs treating, and whether we need extra access for height. We take all of that into account in your quote.
What you get with us
- White, clear, grey or another colour, product permitting
- Sealant colour chosen to suit
- Every job guaranteed for a year
- Old sealant always removed completely
New build mastic around Dunbridge
Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Around Dunbridge, as everywhere, new build mastic is only as good as the preparation behind it.
Dunbridge is about 4 miles north-west of Romsey, in Hampshire. From the centre of Dunbridge to the outskirts, new build mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Dunbridge is one of 683 places in Hampshire we cover for new build mastic. Southampton is on our list too, around 10 miles away.
All of SO51 is covered for new build mastic. We also cover the places around Dunbridge: Mottisfont (1 mile north-east), Kimbridge (1 mile south-east), Stonymarsh (1 mile north-east), Carter's Clay (1 mile south-west) and Lockerley (1 mile west). Further out, we also cover Winchester (10 miles east), Eastleigh (10 miles south-east), Andover (13 miles north), Totton (8 miles south), Chandler's Ford (8 miles south-east) and Hedge End (13 miles south-east).
Near you in Dunbridge
We work in homes and buildings around The Bear And Ragged Staff Public House and the streets around them. There’s a railway station in Dunbridge itself: Mottisfont & Dunbridge station. Well-known places in the area include Romsey Community Hospital (3.9 miles south-east) and King Johns House (3.5 miles south-east).
Aftercare tips
A little care helps the new joints last. Our advice:
- Resist patching a failed seal with a tube from the DIY shop
- Look at the sealant regularly in the first couple of years
- Wipe joints with warm soapy water
- Photograph failed sealant before it’s redone
Keep an eye on the joints over the first couple of years. Hairline gaps can open as timber and plaster dry.
A failed seal in a new home lets water into joists, plasterboard and ceilings. Catching it early keeps the fix to the sealant.
DIY versus a professional finish
Sealing over old silicone is the commonest DIY error. New silicone will not bond to old, so it lifts and traps water and mould underneath. All the old material has to come out first.
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and doesn’t move well, and getting the depth right matters as much as the look.
What affects the cost of new build mastic
Every job gets its own quote. This is what makes a difference:
- The number of rooms or windows
- The size of the job
- Any working-time requirements on site
- Which sealant suits the joint
We don’t show prices on the website, because the cost depends so much on the job itself. For a quick quote, please call 0345 464 0079 or email us.
Asking for a quote
You do not need to know the technical terms. It helps if you can tell us:
- How many joints, rooms or windows are involved
- If it’s domestic, commercial or a hotel
- Where the job is, and your postcode
- Photos by email, if that’s easy
We quote each job on its own. Just call 0345 464 0079 or drop us an email with the details.
Different surfaces, different methods
Windows and doors
Draughts around new frames are often a sealant gap. We check and reseal the frame edges.
Plot handovers
Send us the schedule and any sealant specification and we will quote. We seal bathrooms, kitchens, frames and floors.
Towns and villages near Dunbridge
Other services in Dunbridge
Questions from Dunbridge
Do you work for landlords with property near Mottisfont & Dunbridge station?
Yes, rental work is part of what we do. Just call 0345 464 0079 or email us and tell us about the property, and we will give you a clear quote.
Is Dunbridge in your area for new build mastic?
Yes. Our work covers London and the South East, and Dunbridge is part of that. Just call 0345 464 0079 or send us an email with a few details of the job, and we will give you a clear quote.
Do you work through snagging lists?
Yes. Photos of each sealant item help us quote. Items that need a plumber, tiler or the builder are flagged.
Do you work for developers?
Yes. We carry out plot mastic and second-fix sealing for builders and developers. Send the schedule and any specification and we’ll give you a quote.
How long will you be here?
It depends on the size of the job, but as a guide it takes a few hours for most snagging lists, longer for a run of plots. We’ll tell you when we quote.
Do you guarantee your work?
Yes. Every job comes with a one-year guarantee.
Which products do you use?
The product depends on the job: anti-fungal sanitary silicone in wet areas, and other sealants where joints move or face the weather. We use products from Arbo and Everbuild.
Can you match the sealant colour to my new kitchen or bathroom?
The colour is chosen to suit the tiles, worktop or frame. Let us know your preference when you ask for a quote.
What we do, step by step
We work through the job in order: protection first, then preparation, sealing and a tidy-up. Typically it takes anything from a few hours to several days, depending on the number of plots and we leave things clean and tidy. For a village or hamlet like Dunbridge, the journey is planned in advance: 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 going through the snagging items or plot schedule with you.
- Every bit of the old builder’s sealant is cut out down to clean surfaces.
- We clean out the dust and grit left from the build.
- We prime where needed and apply a sealant suited to each joint.
- We tool every joint neatly and tell you when each area can be used.
Preparing for the visit
- Mention any sign-in or site rules at work premises
- Try not to wet indoor joints just before the visit
- Let us know about earlier repairs to the joints
How to get a quote
To get a quote, ring 0345 464 0079 or drop us an email with the location and a short description of the problem. You’ll have a clear quote before any work starts.