Buckinghamshire · England
Southcourt New Build Mastic
Plot mastic for developers and snagging failed sealant in new homes for homes and businesses in Southcourt and across Buckinghamshire. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- Frame joints opening as the plaster dries
- Untidy sealant flagged on a snagging list
- Gaps behind new kitchen upstands
How the job changes by surface
Kitchens
Beside the sink, the joint takes water every day. We use a sealant suited to kitchens.
Show homes
Show homes need sealant that looks right from day one. We lay neat, even beads in colours to suit the finishes.
New build mastic for homes and businesses in Southcourt
A new house keeps drying out and settling for its first couple of years. Timber shrinks, plaster dries and baths and trays bed down, and sealant applied in a hurry at handover can split. If you have gaps opening as the house dries out and settles and sealant that never bonded to the surface, we can help.
In and around Southcourt, floors range from older timber boards to tiles and newer finishes, from timber that moves with the seasons to tiles laid on concrete. Skirting and threshold joints need a sealant that suits the floor.
We guarantee the work for a year. If there’s a problem with our work within the year, let us know and we’ll sort it.
- Where
- Southcourt (HP21, HP19, HP20)
- Region
- Buckinghamshire
- Cover
- One year on every job
- Quote
- A clear price before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Can I do it myself?
A careful DIYer can reseal a simple joint, 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. Silicone does not stick to old silicone, so it peels away and traps moisture behind it. Everything old must be removed first.
Towns and villages near Southcourt
More services for Southcourt
What we’re called out for in Southcourt
New homes are full of moisture from plaster, screed and concrete, which takes a year or two to dry out. As it does, timber shrinks and joints open, and sealant that cannot keep up splits.
Look out for these signs:
- Untidy sealant flagged on a snagging list
- Internal frame sealant that has split
- Gaps opening as the house dries out and settles
- Plot mastic for developers ahead of handover
In and around Southcourt, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint.
Before booking anyone
- What happens if they find a problem under the old sealant
- Which sealant they’ll use, and why
- How the joint is cleaned and prepared
- Whether all the old sealant comes out first
What we do, step by step
There isn’t much for you to do on the day. Point us to the joints and we will get on with it. The job generally takes anything from a few hours to several days, depending on the number of plots, including the tidy-up. In a smaller place like Southcourt, parking is seldom the issue; lanes, gates and long drives are worth mentioning. For outside work, side access and the height of the joints help us plan.
- Each joint is checked for movement before work begins.
- 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.
- We check every joint and leave you with the cure times.
Getting ready for the visit
- Mention any tricky access
- Tell us about any water getting in
- Mention any sign-in or site rules at work premises
How to get a quote
We quote each job on its own, so start by telling us what you need. Just ring 0345 464 0079 or drop us an email with the details and send pictures if you have them.
Advice
Common questions in Southcourt
Is Southcourt in your area for new build mastic?
Yes, Southcourt is within the area we cover. Our work covers London and the South East. You can ring 0345 464 0079 or email us and let us know what needs doing.
Is Southcourt within the area you cover?
Yes, Southcourt is covered. We work across London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
How long does new build mastic take?
That depends on the amount of work, but most jobs take a few hours in a single home. We’ll tell you when we quote.
Can you do several jobs on one visit?
Yes, we can. Several rooms, windows or areas can go on one quote.
Can you match the sealant colour to my new kitchen or bathroom?
Most bathroom joints are white or clear, but other colours are available. We match the colour to the finish.
Is there a guarantee?
Yes, for a year. If anything isn’t right with the work within the year, let us know and we will sort it.
When is the best time to reseal in a new build?
It depends on whether water is getting through. A leaking shower or bath seal should be redone straight away, while small cosmetic gaps can wait a while.
Do you work for hotels and businesses?
Yes. Larger jobs can be planned room by room or area by area to suit the site.
Why it’s worth doing now in Southcourt
Sealant done properly at handover means fewer callbacks. Snagging visits for failed sealant cost time on every plot, and they’re avoidable with good preparation. In a smaller place like Southcourt, wherever a wall is exposed, a failed outside joint is a real source of damp. Indoors, a failed seal lets water into floors and panels as it would anywhere.
Homes and businesses are quoted the same way: how much there is to do, how we reach it and what it needs, plus any working-time requirements on site. Call for a quick quote and we’ll go through it with you.
What you get with us
- 20+ years of sealant experience
- Domestic, commercial and hotel work
- One-year guarantee on every job
- Any old sealant cut out fully, not covered over
Take a look at how sealant jobs are priced and our reviews.
What sealant work can’t fix
Some problems need a builder, plumber or other trade rather than us:
- Your warranty claim itself, which is between you and the builder
- Structural cracks in walls or ceilings
- Leaking fittings rather than failed sealant
If in doubt, phone 0345 464 0079 or email us and we will say what we think.
Where we work in Southcourt
- Skirting & floors
- Plot handovers
- Show homes
- Kitchens
- Windows & doors
- Bathrooms & en suites
Joints and finishes in Southcourt homes
The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
If you’ve bought a new home near Aylesbury station, the sealant around baths, showers and frames is worth checking in the first year or two.
Southcourt is about 1 mile south of Aylesbury, in Buckinghamshire. We provide new build mastic to homes and businesses in Southcourt and the surrounding area, as part of our work across Buckinghamshire. Southcourt is one of 263 towns and villages in Buckinghamshire where we work. We also work in Oxford, about 18 miles from Southcourt.
Every address in HP21, HP19 and HP20 is covered for new build mastic, from the main roads to the quietest streets. We cover properties on Lee Road, Tyne Road and Tees Road and the roads around them. Nearby, we also carry out new build mastic in California (1 mile north), Walton (1 mile north-east), Queens Park (1 mile north-east), Aylesbury (1 mile north) and Fairford Leys (1 mile north-west). Within a short drive, we also cover High Wycombe (12 miles south), Chesham (11 miles south-east), Buckingham (15 miles north-west), Amersham (13 miles south-east), Beaconsfield (15 miles south-east) and Princes Risborough (6 miles south). Being one of Buckinghamshire’s larger places, Southcourt has homes, rented property and businesses of every kind.
Around Southcourt
Around Southcourt, our work takes us to homes and buildings near The Aristocrat pub, Pebble Brook School and Mandeville Upper School, among other places. For rail, the closest station is Aylesbury station, roughly 0.7 miles north. Other landmarks nearby include Friars Square (0.8 miles north) and Dinton Castle (3.2 miles west). Not far away are Beacon Hill.
Landlord and commercial work in Southcourt
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements.
Failed sealant is one of the commonest items on a check-out report, and it’s easy to sort out between tenants. Several properties can go on one quote.