West Sussex · England
Middleton-on-Sea New Build Mastic
Plot mastic for developers and snagging failed sealant in new homes for homeowners, landlords and businesses in Middleton-on-Sea. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- Joints pulling apart as timber shrinks
- Cracked caulk along new skirting
- Second-fix sealing on new plots
Leave it or put it right?
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 Middleton-on-Sea, damp from a failed joint can get into timber and plaster, which is far harder to put right than the sealant itself.
Every job is a little different, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all make a difference, and we will explain the quote if you ask.
What you get with us
- A 12-month guarantee on all work
- Approved under the ARBOMaster scheme
- Fully insured
- More than 20 years in sealant work
See what affects the cost and customer reviews.
New build mastic for homes and businesses in Middleton-on-Sea
New homes move as they dry out. Timber shrinks, plaster dries and baths and trays bed down, so sealant that was laid quickly before handover often cracks. We work on skirting & floors, plot handovers and show homes, and common reasons people get in touch are frame joints opening as the plaster dries and sealant that never bonded to the surface.
Where new homes go up in smaller places like Middleton-on-Sea, it’s often a small development or a single plot. The sealant around baths, showers, frames and skirtings needs to be right from the start.
Your job is guaranteed for a year, as with all our work.
- Where
- Middleton-on-Sea (PO22, BN18)
- Region
- West Sussex
- Guarantee
- One year on every job
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Towns and villages near Middleton-on-Sea
What else we do in Middleton-on-Sea
Joints and finishes in Middleton-on-Sea homes
Middleton-on-Sea is close to 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, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Around Middleton-on-Sea, as everywhere, new build mastic is only as good as the preparation behind it.
Middleton-on-Sea is about 3 miles east of Bognor Regis, in West Sussex. From the centre of Middleton-on-Sea to the outskirts, we cover new build mastic for every kind of property, from flats and houses to offices and hotels. Our area takes in 371 places across West Sussex. You can also see our page for Portsmouth, about 20 miles away.
All of PO22 and BN18 is within our area for new build mastic, from the main roads to the quietest streets. If you need new build mastic at a property on Sea Lane, Elmer Road and Yapton Road or anywhere close by, our applicators can take on the job. Neighbouring places we cover for new build mastic include Elmer (1 mile east), Bilsham (1 mile north), Flansham (1 mile north-west), Felpham (2 miles west) and Yapton (2 miles north). Within a short drive, we also cover Worthing (10 miles east), Bognor Regis (3 miles west), Chichester (8 miles north-west), Selsey (8 miles south-west), Littlehampton (4 miles east) and Lancing (13 miles east).
What’s near Middleton-on-Sea
In Middleton-on-Sea, that means homes and buildings near Felpham Community College, among other places. Middleton-on-Sea’s nearest station is Bognor Regis station, roughly 2.5 miles west. A little further out are Bognor Regis Museum (2.7 miles west) and Tote Copse Castle (4.2 miles north-west).
The process
We bring everything the job needs with us. After a quick look at the joints together, we protect the area and start. It normally takes anything from a few hours to several days, depending on the number of plots. Parking around Middleton-on-Sea is usually easier than in a town centre, but mention any lanes, gates or long drives. If the job is outside, tell us about side access and how high the joints are.
- First we work through your snagging list or plot schedule with you.
- Failed or untidy sealant is cut out completely.
- Each joint is cleaned of dust and grit, then primed if required.
- New sealant suited to each joint is applied and tooled neatly.
- We check every joint and tell you how long each needs to cure.
Preparing for the visit
- Mention if the joints have been sealed before
- Tell us about access, such as stairs, a lift or high-level joints
- Keep pets and children clear of the area while we work
How to get a quote
Asking for a quote is easy: let us know the job and the location. Photos by email help us understand the job.
Related advice
DIY versus a professional finish
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and does not move well, and getting the depth right matters as much as the look.
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Work for landlords, hotels and businesses
If you manage several properties in or around Middleton-on-Sea, several properties can be quoted together. Just tell us the addresses and what each one needs.
We also work for property managers and facilities teams in Middleton-on-Sea and across West Sussex. We can quote a run of properties together, and we are fully insured for the work.
Your questions about new build mastic in Middleton-on-Sea
Is Middleton-on-Sea in your area for new build mastic?
Yes, Middleton-on-Sea is within the area we cover. We work across London and the South East. Just phone 0345 464 0079 or email us with a few details of the job.
I let a flat near Bognor Regis station. Can you help?
Yes, we work for landlords and letting agents. You can phone 0345 464 0079 or send us an email with the address and a few details, and we will give you a fixed price before we start.
Do you take out the old sealant first?
Yes. All of the old material is cut out and the joint cleaned before applying anything new.
Can I do it myself?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
What should I tell you?
Only a few details: the address or postcode, what’s wrong and any access issues. Then ring 0345 464 0079 or email us.
Where is Mr Mastic based?
Our base is in Crawley, West Sussex, and we cover South East England, London and all of Scotland.
Can you quote for more than one area?
Yes. Just list everything you need.
Are you fully insured?
Yes. We are fully insured.
How we quote for new build mastic
There’s no set price list, because jobs vary so much. What we look at:
- Whether there’s mould to deal with
- The size of the job
- The type of sealant required
- Access and height
Leaving a failed joint usually makes the job bigger, not smaller. If you are unsure, ring 0345 464 0079 or email us for an honest opinion and a quote.
Helping us quote
A few details help us give you an accurate quote. When you get in contact, it helps to mention:
- Whether it’s a home or a business
- How many joints, rooms or windows are involved
- How we’d reach the joints
- Where the property is
Want a quote for new build mastic? Please phone 0345 464 0079 or email us and tell us about the job. You will know what we plan to do, and what it will cost, before any work begins.
Common problems we fix in Middleton-on-Sea
When the heating goes on in the first winter, the house dries fast. Gaps open along skirting, frames and worktops.
It’s worth asking for a quote if you see:
- Sealant that never bonded to the surface
- Sealant work across a run of new homes
- Leaking shower tray seals in a new home
- Frame joints opening as the plaster dries
For new homes near Bognor Regis station, it’s worth checking the sealant early, while snags are still fresh.
Questions to ask before booking
- Which colour the sealant will be
- Is the old sealant removed completely?
- Who turns up on the day
- What insurance they hold
What we can’t put right
It helps to know what we can’t do too:
- Plumbing faults behind the sealant
- Cracked trays, tiles or worktops
- Cracking that points to a structural problem
Not sure which it is? You can ring 0345 464 0079 or email us and we’ll tell you honestly before booking.
Where we work in Middleton-on-Sea
- Skirting & floors
- Kitchens
- Bathrooms & en suites
- Show homes
- Plot handovers
- Windows & doors