West Sussex · England
Shoreham-by-Sea New Build Mastic
We cover Shoreham-by-Sea for plot mastic for developers and snagging failed sealant in new homes. Old sealant removed completely, joints prepared properly and a one-year guarantee.
- Shower seals failing in the first year or two
- Sealant applied over dusty or wet surfaces
- Sealant work across a run of new homes
Your questions about new build mastic in Shoreham-by-Sea
Is Shoreham-by-Sea in your area for new build mastic?
Yes, Shoreham-by-Sea is within the area we cover. We work across London and the South East. You can call 0345 464 0079 or send us an email and tell us what needs doing, and we will give you a clear price.
Can you help a landlord with a rental near Shoreham-By-Sea station?
Yes, rental work is part of what we do. You can phone 0345 464 0079 or drop us an email with the address and a few details, and we’ll give you a fixed price before we start.
Can you quote for more than one area?
Yes. Tell us about everything you’d like done and we will quote it together.
Where is Mr Mastic based?
We are based in Crawley, and we work across South East England, London and Scotland.
Is it normal for sealant to crack in a new home?
Lots of new homes see sealant crack early. Poor preparation at handover adds to it.
How do I get a quote for new build mastic in Shoreham-by-Sea?
Every job is different, so each one gets its own quote. To get one, phone 0345 464 0079 or drop us an email and tell us what needs doing and where.
Can you do plot mastic on a new development?
Yes. Second-fix sealing in bathrooms, kitchens, frames and floors is part of what we do. Good preparation keeps snagging to a minimum.
What do you put in the joint?
It depends on the joint: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. We use products from Arbo and Everbuild.
New build mastic in Shoreham-by-Sea, done properly
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 with a sealant suited to each area. We’re often asked to deal with new-build shower sealant that has already split and beads laid onto grit and dust from the build, on kitchens, bathrooms & en suites and plot handovers.
In a town like Shoreham-by-Sea, older houses sit alongside newer estates, with new homes still going up on the edge of many towns. Whether a house is brand new or a few years old, sealant and floor joints are often the first snags to show.
All of our work is guaranteed for twelve months.
- Location
- Shoreham-by-Sea (BN43, BN15, BN42)
- Wider area
- West Sussex
- Cover
- 12 months on all our work
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Surface by surface
Bathrooms and en suites
En suite seals are easy to miss on a snagging list until they leak. A proper reseal keeps water in the tray.
Windows and doors
External mastic around new windows and doors is sometimes rushed or missed. It’s resealed with an exterior sealant suited to the frame and wall.
When it isn’t the sealant
We won’t take on work that won’t last, so these are the limits:
- Your warranty claim itself, which is between you and the builder
- Cracking that points to a structural problem
- A tray or bath that isn’t properly supported, until it’s fixed
If in doubt, call 0345 464 0079 or send us an email and we will say what we think before you book.
Surfaces we seal
- Windows & doors
- Kitchens
- Plot handovers
- Show homes
- Bathrooms & en suites
- Skirting & floors
Aftercare tips
So the new joints stay in good condition:
- Follow the cure time we give you
- Use the extractor fan every time you shower
- Avoid scourers and strong chemicals on sealant
- Do not seal over failed sealant yourself
Keep the bathroom ventilated, especially in the first year. Run the fan or open a window after bathing so moisture does not sit on the sealant.
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.
Landlords, agents and businesses in Shoreham-by-Sea
Mouldy or split sealant often shows up at the end of a tenancy, and it’s quick to put right between tenancies. We can quote for more than one property at once.
We also work for property managers and facilities teams. We can quote a run of properties together, and we are fully insured.
New homes and floors in Shoreham-by-Sea
Shoreham-by-Sea is within about 1 mile of the coast. New homes near the sea put their outside mastic to work from day one, so any gaps are best picked up early. London and the South East are among 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 Shoreham-by-Sea, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint.
Shoreham-by-Sea is about 4 miles west of Brighton and Hove, in West Sussex. From the centre of Shoreham-by-Sea to the outskirts, new build mastic is available for homes and businesses alike. Across West Sussex, we cover 371 places, Shoreham-by-Sea among them. Brighton is on our list too, around 6 miles away.
Here we cover the BN43, BN15 and BN42 postcode area for new build mastic. That includes homes and businesses on Adelaide Square, High Street and Rainbow Square. Shoreham-by-Sea is on the A27 and A259, which makes it straightforward to reach with everything needed for new build mastic. Other places close to Shoreham-by-Sea include Old Shoreham (1 mile west), Kingston by Sea (1 mile east), Adur (1 mile north-west), Southwick (2 miles east) and Portslade (2 miles east). Within a short drive, we also cover Worthing (6 miles west), Haywards Heath (14 miles north-east), Burgess Hill (10 miles north-east), Littlehampton (12 miles west), Rustington (11 miles west) and Storrington (10 miles north-west).
Local landmarks in Shoreham-by-Sea
Around Shoreham-by-Sea, our work takes us to homes and buildings near Shoreham College, The Crabtree pub and Shoreham Academy, among other places. There’s a railway station in Shoreham-by-Sea itself: Shoreham-By-Sea station. Other landmarks nearby include Southlands Hospital (0.6 miles north-east). Open spaces near Shoreham-by-Sea include Thundersbarrow Hill and Shoreham Beach.
How it works
Once we are on site, we compare the joints with what we discussed. If anything is different, we explain it before carrying on. Most jobs then take a few hours for most snagging lists, longer for a run of plots. For a job in Shoreham-by-Sea, we need access to where the work is and somewhere nearby to park. For outside work, let us know about side access, gates and any upper-floor joints.
- Each joint is checked for movement before work begins.
- Old sealant is cut out and the joints cleaned.
- We make sure the joints are dry and prime them if needed.
- Baths are filled with water, then the new sealant is applied.
- The finished joints are checked and the cure times given.
How to prepare
- Mention if the joints have been sealed before
- Keep pets and children clear of the area while we work
- Let us know if you’ve seen damp or leaks
Ask for a quote
If you’re in Shoreham-by-Sea and need new build mastic, call 0345 464 0079 or email us. A short description of the job and where it is helps us quote, and you’ll get a clear quote before work begins.
Advice
What affects the cost of new build mastic
Jobs vary more than people expect. The main factors:
- How many areas need sealing
- How easy the joints are to reach
- The size of the job
- Whether old sealant or filler has to be cut out
Every job is a little different, so we quote each one individually. The number of joints, how easy they are to reach and the sealant needed all make a difference.
What we need to know
To make quoting easier, please include:
- Where the job is, and your postcode
- How we’d reach the joints
- What the problem is, such as mould, gaps, leaks or cracking
- Pictures of the joints, sent by email
Quotes start with a quick conversation. Describe the problem, the location and the size of the job. Whenever you’re ready, call 0345 464 0079 or drop us an email.
Also near Shoreham-by-Sea
What else we do in Shoreham-by-Sea
What we’re called out for in Shoreham-by-Sea
A new house holds a lot of water from the build, which takes a year or two to dry out. As it does, timber shrinks and joints open.
The problems people usually mention when they call include:
- Gaps opening as the house dries out and settles
- Internal frame sealant that has split
- Gaps behind new kitchen upstands
- Skirting joints opening in the first winter
For new homes near Shoreham-By-Sea station, it’s worth checking the sealant early, while snags are still fresh.
What to look for in a quote
- Which colour the sealant will be
- How the surfaces are prepared before sealing
- What the quote includes, VAT included or not
- Whether they seal over old material or remove it