Brighton and Hove · England
New-build mastic & snagging in Seven Dials, Brighton and Hove
New build mastic for Seven Dials, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Internal frame sealant that has split
- Gaps behind new kitchen upstands
- Cracked caulk along new skirting
For landlords and businesses
Mouldy or split sealant often shows up at the end of a tenancy, and it’s quick to put right between tenancies. Several properties can be quoted together.
For anyone letting property in or around Seven Dials, jobs at different addresses can be quoted together. Send us the addresses and the work at each, and photos by email help.
How we handle new build mastic in Seven Dials
A new house keeps drying out and settling for its first couple of years. Timber dries and shrinks, and baths and trays settle, and sealant applied in a hurry at handover can split. Common call-outs are for plot mastic for developers ahead of handover and kitchen sealant that has pulled off the wall, on plot handovers, kitchens and skirting & floors.
For a new home in or near Seven Dials, it’s worth checking the sealant early. Common snags include open skirting joints, lifting shower seals and gaps around frames.
Every job comes with a one-year guarantee, wherever you are in Brighton and Hove.
- Where
- Seven Dials (BN1, BN3, BN50)
- Wider area
- Brighton and Hove
- Cover
- One year on every job
- Quotes
- A clear price before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
New homes and floors in Seven Dials
Seven Dials 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. 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.
In and around Seven Dials, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint.
Seven Dials is about 1 mile west of Brighton, in Brighton and Hove. If you need new build mastic in Seven Dials, please call 0345 464 0079 or send us an email for a quick quote. We’re based in Crawley and cover Brighton and Hove. We cover 30 towns and villages across Brighton and Hove, from the larger towns to small villages.
Postcode districts we cover here for new build mastic: BN1, BN3 and BN50. Local streets include Dyke Road, Powis Road and York Avenue, and we cover them all. Being close to the A2010, Seven Dials is easy for our applicators to reach for new build mastic. If you are just outside Seven Dials, we cover West Hill (1 mile south-east), Prestonville (1 mile north), Brunswick (1 mile south-west), Brighton (1 mile east) and Hanover (1 mile east). Larger places within reach include Hangleton (3 miles north-west), Saltdean (5 miles east), East Saltdean (6 miles east), Roedean (3 miles south-east), Rottingdean (4 miles east) and Ovingdean (3 miles east). Seven Dials is among the bigger towns we cover in Brighton and Hove.
What’s near Seven Dials
Around Seven Dials, our work takes us to homes and buildings near Stanford Junior School, The Cow pub and St. Ann's Well Gardens. Seven Dials has its own railway station: Brighton station. A little further out are Montefiore Hospital (within half a mile west) and Brighton Transport Museum (0.6 miles north). For a walk, there’s Newmarket Hill and Whitehawk Hill.
What happens on the day
On the day, there’s very little for you to do. Point us to the joints and we’ll get on with it. The job generally takes anything from a few hours to several days, depending on the number of plots from start to finish. Parking around Seven Dials is generally easier than in a town centre, but mention any lanes, gates or long drives. For outside work, side access and the height of the joints help us plan.
- First, the list of joints is agreed from your snagging sheet or plot schedule.
- The failed sealant is removed completely down to clean surfaces.
- We clean out the dust and grit left from the build.
- Primer goes on where the surface and product need it, then the new sealant.
- We tool every joint neatly and tell you when each area can be used.
Preparing for the visit
- Mention if the joints have been sealed before
- Clear the area around the work
- Mention any leaks or damp you’ve noticed
Ask for a quote
For a quote, ring 0345 464 0079 or send us an email with the location and a short description of the problem. You will have a clear quote before we start.
Related advice
What we can’t put right
It helps to know what we can’t do too:
- Structural cracks in walls or ceilings
- Deciding who is responsible under a builder’s warranty
- Damaged fittings that need replacing
Not sure which it is? You can ring 0345 464 0079 or send us an email and we’ll tell you honestly.
Surfaces we seal
- Bathrooms & en suites
- Kitchens
- Skirting & floors
- Show homes
- Windows & doors
- Plot handovers
Places near Seven Dials
Other services in Seven Dials
Signs you need new build mastic in Seven Dials
The wrong product is sometimes used in the wrong place: caulk where water collects, or a rigid product on a moving joint. Both fail early.
The problems people generally mention when they call include:
- Smeared, uneven beads picked up at snagging
- Gaps between new skirting and floors
- Cracked sealant around new window and door frames
- New-build shower sealant that has already split
For new homes near Brighton station, it’s worth checking the sealant early, while snags are still fresh.
Comparing quotes
- How the surfaces are prepared before sealing
- How long the guarantee is
- When the joint can take water or movement
- Which sealant they’ll use, and why
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.
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Different surfaces, different methods
Plot handovers
We work through plots to your schedule, sealing each room ready for handover. Joints are prepared properly before sealing.
Skirting and floors
Wet-area floor joints need a flexible seal. They get a flexible, water-resistant sealant.
Looking after it afterwards
Looking after new joints is easy:
- Resist patching a failed seal with a tube from the DIY shop
- Clean sealant with mild detergent, not abrasives
- Ventilate bathrooms well, especially in the first year
- Report sealant problems to your builder during the snagging period
Ventilation matters in a new home, which is still drying out. Run the fan or open a window after bathing so moisture does not sit on the sealant.
If a shower tray or bath seal splits in the first year, look for movement. Have it resealed, and the tray or bath checked, before it gets worse.
Questions from Seven Dials
Is Seven Dials within the area you cover?
Yes. Seven Dials is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Can you do new build mastic in Seven Dials?
Yes. Our work covers London and the South East, and Seven Dials is part of that. Just call 0345 464 0079 or drop us an email with a few details of the job, and we will send you a clear quote.
What colour sealant will you use?
The colour is chosen to suit the tiles, worktop or frame. Tell us what you’d like when you get a quote.
How long before the joint can be used?
That depends on the sealant used, so please follow the time we give you.
Who should fix failed sealant in a new build?
Start with your builder while their snagging or warranty period runs. After that, or if their repair keeps failing, we can do it with our 12-month guarantee.
Do you work for letting agents?
Yes. Domestic, commercial and hotel work are all part of what we do.
Do you hold any approvals?
Yes. We’re ARBOMaster approved, the scheme for applicators of Arbo sealants.
Where do you work from?
Mr Mastic is based in Crawley. Our applicators cover Seven Dials.