West Sussex · England
New Build Mastic in Southwater
New build mastic in Southwater from a team with over 20 years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Leaking shower tray seals in a new home
- Worktop and upstand sealant coming away
- Second-fix sealing on new plots
How we handle new build mastic in Southwater
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. Common call-outs are for messy sealant that spoils new finishes and leaking shower tray seals in a new home, on bathrooms & en suites, plot handovers and windows & doors.
Homes around Southwater range from older cottages to newer houses, and their floors range just as widely, from timber that moves with the seasons to tiles laid on concrete. Skirting and threshold joints need a sealant that suits the floor.
You’re covered for a year from the day we finish. If anything is not right with it, call 0345 464 0079 or email us.
- Place
- Southwater (RH13)
- Wider area
- West Sussex
- Guarantee
- One year on every job
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Honest limits
New sealant can’t fix everything, and we’ll tell you before work begins. It won’t solve:
- Your warranty claim itself, which is between you and the builder
- Plumbing faults behind the sealant
- Settlement cracks that need a surveyor
If in doubt, phone 0345 464 0079 or email us and we’ll say what we think.
Where we work in Southwater
- Bathrooms & en suites
- Plot handovers
- Skirting & floors
- Windows & doors
- Kitchens
- Show homes
Places near Southwater
More services for Southwater
The process
We keep the work tidy and contained to the area we’re working on, so you can carry on as normal. The job generally takes anything from a few hours to several days, depending on the number of plots. A visit to Southwater is planned like any other: the time, the access and where to park are agreed in advance. If the work is outside, the weather plays a part, as sealant needs a dry surface.
- We start by agreeing which joints are on the list, from the snagging sheet or plot schedule.
- The old bead comes out in full, with no layer left behind.
- Surfaces are cleaned of building dust and primed where needed.
- A sealant chosen for each area goes in and is tooled smooth.
- Each area is checked and left with its cure time.
Preparing for the visit
- Clear items away from the joints we are working on
- Where the joints are inside, avoid wetting them before we arrive
- Mention any parking rules near the property
Getting a quote
For a quick quote, get us on the phone, or email us if that’s easier. Describe what needs sealing and we’ll explain what’s involved before giving you a price.
Read more
What affects the quote in Southwater
Call for a quick quote. The main things that affect it are:
- The size of the job
- Access and height
- Any working-time requirements on site
- Whether old sealant or filler has to be cut out
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether the work is at height. We take all of that into account in your quote.
What we need to know
Before you ask for a quote, have a think about:
- A few pictures by email, if you can
- If someone has resealed it before
- Where the property is
- The type of property
We don’t publish a price list, as no two jobs are quite the same. Instead, your job gets its own clear quote. To get started, call 0345 464 0079 or email us.
Why act early in Southwater
Sealant done properly at handover means fewer callbacks. Every return visit for a failed seal takes time and most come down to preparation. Around Southwater, water from a failed joint in an older home can soak into timber and plaster, and that is a much bigger job than renewing the sealant.
What you pay reflects the work, not a rough estimate. That is why we ask about the job first and send you a clear quote before any work starts.
Why choose Mr Mastic in Southwater
- Colour agreed with you before any work starts
- Over 20 years’ experience
- Anti-fungal silicone where joints get wet
- Rated 4.9 stars on Google
See our cost guide and our reviews.
What the job involves on each surface
Windows and doors
A draught at a new window can be a missed or failed joint. We look at the joints and reseal where needed.
Kitchens
Sink joints are wet all the time. We use a sealant suited to kitchens.
Common questions in Southwater
I let a flat near Christs Hospital station. Can you help?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. Just call 0345 464 0079 or send us an email with the address and what needs doing, and we will give you a clear quote.
Do you cover smaller places like Southwater?
Yes, Southwater is covered. We work across London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Do you remove the old sealant?
Yes, always, and completely. New sealant won’t bond properly to old, so the joint is cleaned back first.
Why does sealant fail so quickly in new builds?
A new house dries and settles for a year or two, and sealant is often applied quickly onto dusty surfaces. Either can make it fail early.
Will there be a smell?
That depends on the sealant. Some products have a noticeable smell, others very little, and any smell fades as they cure.
Which products do you use?
We choose the sealant for the joint, not the other way round. Movement, water and weather all affect the choice, and we’ll explain our choice.
Can I send you my snagging list?
Yes. Send the list and a few photos of the sealant items. We will tell you if anything on it is not a sealant job.
Who should fix failed sealant in a new build?
While the snagging or warranty period runs, the builder should be your first contact. If they’re slow or the fix doesn’t last, we can help.
How to look after the new joints
How long the joints last depends on use and care. Here’s what we suggest:
- Wait for the cure time before using a resealed shower
- Report sealant problems to your builder during the snagging period
- Use the extractor fan every time you shower
- Wipe joints with warm soapy water
Photograph failed sealant before it’s redone and keep the builder’s replies. It’s useful if you need to raise other issues later.
Report failed sealant to the builder while you are in the snagging period. After that, putting it right may fall to you.
New build mastic around Southwater
Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
In and around Southwater, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint. If you’ve bought a new home near Christs Hospital station, the sealant around baths, showers and frames is worth checking in the first year or two.
Southwater is about 3 miles south of Horsham, in West Sussex. For new build mastic in and around Southwater, it’s easy to get a quote: please phone 0345 464 0079 or email us. We are based in Crawley and cover West Sussex. Southwater is one of 371 towns and villages in West Sussex we cover. For nearby work, see our Crawley page, about 9 miles away.
Our applicators cover all of RH13 for new build mastic and the streets around it. That includes homes and businesses on Station Road, Walmer Close and Pevensey Road and the roads around them. We also cover the places around Southwater: Tower Hill (2 miles north), Nuthurst (2 miles east), Brooks Green (2 miles west), Barns Green (2 miles west) and Maplehurst (2 miles south-east). Further out, we also cover Crawley (9 miles north-east), Horsham (3 miles north), Worthing (14 miles south), Haywards Heath (11 miles east), Burgess Hill (11 miles south-east) and Shoreham-by-Sea (13 miles south).
Local landmarks in Southwater
Typical jobs here are in homes near The Lintot pub and The Doyle School of Design and Technology and the streets around them. The closest station to Southwater is Christs Hospital station, roughly 1.9 miles north-west of the centre. Well-known places in the area include Christs Hospital School Museum (1.5 miles north-west) and Horsham Hospital (3.2 miles north). Green spaces nearby include Knepp Wildland.
Landlord and commercial work in Southwater
If you manage several properties in or around Southwater, several properties can be quoted together. Send us the addresses and the work at each, and photos by email help.
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.