West Sussex · England
Southbourne New Build Mastic
Plot mastic for developers and snagging failed sealant in new homes in Southbourne, with a 12-month guarantee on every job. Call for a quick quote.
- Kitchen sealant that has pulled off the wall
- Sealant applied over dusty or wet surfaces
- Cracked caulk along new skirting
New build mastic in Southbourne
A new build should have a neat, sound bead at every joint. Smeared, patchy or cracked sealant is worth sorting early, before water gets into the floor or walls. We are often asked to deal with messy sealant that spoils new finishes and new-build shower sealant that has already split, on kitchens, skirting & floors and windows & doors.
In smaller places like Southbourne, new homes tend to come as small developments or single plots. The sealant around baths, showers, frames and skirtings needs to be right from the start.
Whatever the size of the job, you get the same one-year guarantee in Southbourne and across West Sussex.
- Where
- Southbourne (PO10)
- Wider area
- West Sussex
- Cover
- 12 months on all our work
- Quote
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
What we can’t put right
In fairness, some problems need a different trade:
- Cracked trays, tiles or worktops
- Disputes or warranty claims with your builder
- Baths and trays that move too much for sealant to cope with
If you are not sure, just ring 0345 464 0079 or drop us an email and we’ll give you a straight answer.
What we seal
- Kitchens
- Plot handovers
- Bathrooms & en suites
- Windows & doors
- Skirting & floors
- Show homes
FAQs for Southbourne
Will you come out to Southbourne?
Yes, we do. We work across London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Can you do new build mastic in Southbourne?
Yes, Southbourne is within the area we cover. We work across London and the South East. You can ring 0345 464 0079 or email us and tell us what needs doing.
Do you work for developers?
Yes. We take on second-fix sealant work across new plots. We clean and prime joints properly to keep callbacks down.
Do the sealants smell?
Some sealants have a smell while they cure, but it fades. Opening a window helps.
Will you just run a new bead over the existing one?
No. New silicone won’t bond to old silicone, so sealing over the top fails quickly. We cut the old bead out completely.
Will the old sealant be removed?
Always. Sealing over the old bead is the commonest cause of early failure, so we never do it.
How long will you be here?
It depends on the size of the job, but as a guide it takes anything from a few hours to several days, depending on the number of plots. We will tell you when we quote.
What information do you need?
A short description and the location, plus photos if you have them. If we need more, we’ll ask.
Landlord and commercial work in Southbourne
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
Letting agents often deal with us directly. Tell us the address, the job and how access works and we’ll give you a quote.
What new build mastic looks like in Southbourne
Southbourne is within about 1 mile of the coast. Plot mastic on new homes near the coast takes more weather than it would inland, so any gaps are best picked up early. 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.
In and around Southbourne, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint. If you’ve bought a new home near Southbourne station, the sealant around baths, showers and frames is worth checking in the first year or two.
Southbourne is about 4 miles east of Havant, in West Sussex. Our applicators cover new build mastic for householders, landlords and businesses in Southbourne and nearby. Our West Sussex coverage runs to 371 places, Southbourne among them. For nearby work, see our Portsmouth page.
Postcode districts we cover here for new build mastic: PO10. We cover properties on Lodgebury Close, Manor Road and Northcote Gardens and the roads around them. Neighbouring places we cover for new build mastic include Woodmancote (1 mile north), Lumley (1 mile west), Westbourne (1 mile north-west), Emsworth (1 mile west) and Thorney Island (2 miles south-west). Further out, we also cover Bognor Regis (11 miles south-east), Chichester (6 miles east), Selsey (10 miles south-east), Portfield (6 miles east), Yapton (13 miles east) and East Wittering (6 miles south).
Landmarks near Southbourne
We work in homes and buildings around The Traveller's Joy Public House, Eames Farm and Bourne Community College, among other places. Southbourne has its own railway station: Southbourne station. Other landmarks nearby include Warblington Castle (2.5 miles west) and Emsworth Museum (1.3 miles west). Open spaces near Southbourne include Stoke Down and Brook Meadow (Emsworth).
Keeping the joints in good condition
Looking after new joints is easy, and it makes a real difference:
- Put sealant faults on your snagging list early
- Photograph failed sealant before it’s redone
- Use the extractor fan every time you shower
- Get a leaking seal dealt with right away
Wipe the sealant with warm soapy water. Keep scourers and harsh chemicals off it, which can damage the surface.
A failed seal in a new home lets water into joists, plasterboard and ceilings. Catching it early keeps the fix to the sealant and protects the rest of the house.
What affects the quote in Southbourne
The quote reflects the job in front of us. We look at:
- How much old sealant there is and how hard it is to remove
- How easy the joints are to reach
- Whether there’s mould to deal with
- The type of sealant required
What it costs depends on how much there is to do, how hard the old material is to remove and how easy the joints are to reach. We give a clear quote before we start, so you know where you stand.
What we need to know
The more you tell us, the more accurate the quote. When you get in contact, it helps to mention:
- What the problem is, such as mould, gaps, leaks or cracking
- The type of property
- Any previous sealing or DIY work
- Photos by email, if that’s easy
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints.
The process
When we arrive, we look over the joints with you first. Surfaces next to the work are protected before any work begins. Most jobs take a few hours for most snagging lists, longer for a run of plots. For a job in Southbourne, we agree the time, the access and parking before the day. If the work is outside, the weather plays a part, as sealant needs a dry surface.
- We start by going through the snagging items or plot schedule with you.
- The failed sealant is removed completely, with no layer left behind.
- 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.
How to prepare
- Let us know about stairs, lifts or work at height
- Let us know about earlier repairs to the joints
- Try not to wet indoor joints just before the visit
How to get a quote
Asking for a quote is easy: let us know the job and the location and its rough size. Photos by email help us understand the job, and we’ll come back to you with a quote.
Related advice
Also near Southbourne
What else we do in Southbourne
Why deal with it now?
The builder is normally 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. In an older home around Southbourne, damp from a failed joint can get into timber and plaster, and that is a much bigger job than renewing the sealant.
No two jobs are quite the same, 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, and we’ll explain the quote if you ask.
Why us?
- 4.9 on Google from 180+ five-star reviews
- Any old sealant cut out fully, not covered over
- You choose the colour before work begins
- Over 20 years’ experience
DIY sealant or a professional job?
If you’re set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, then guaranteed for a year.