Kent · England
New Build Mastic in St Mary's Bay
Problem with your new-build sealant joints in St Mary's Bay? We cut out the old, prepare the joints and apply the right sealant, and the work is guaranteed for a year.
- Worktop and upstand sealant coming away
- New-build shower sealant that has already split
- Cracks appearing as a new home settles
The process
When we get to you, we check the joints match what you told us. If anything is different, we explain it before carrying on. After that, the work takes a few hours for most snagging lists, longer for a run of plots. For a job in St Mary's Bay, we agree the time, the access and parking before the day. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- Each joint is checked for movement before any work starts.
- 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.
Preparing for the visit
- Tell us about any previous sealing or DIY attempts
- For business premises, tell us about site rules or sign-in
- Mention any parking rules near the property
Getting a quote
Need a quote? Please phone 0345 464 0079 or email us and tell us about the job. We’ll explain what we’d do and give you a clear quote before any work starts.
Related advice
About our new build mastic in St Mary's Bay
Our new-build work comes in two parts: plot mastic for developers, and putting right failed sealant for people who’ve bought a new home. In both, preparation makes the difference since hurried prep is behind a lot of new-build failures. We are often asked to deal with smeared, uneven beads picked up at snagging and gaps between new skirting and floors, on plot handovers, kitchens and show homes.
In smaller places like St Mary's Bay, new homes tend to come as small developments or single plots. Each still needs its sealant and floor joints finished properly from day one.
We stand behind the work with a 12-month guarantee, so you are covered after we have gone.
- Location
- St Mary's Bay (TN29)
- Region
- Kent
- Cover
- 12 months on all our work
- Quote
- A clear price before work begins
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Questions from St Mary's Bay
Is St Mary's Bay in your area for new build mastic?
Yes, St Mary's Bay is within the area we cover. Our work covers London and the South East. You can phone 0345 464 0079 or email us and tell us what needs doing, and we will give you a clear quote.
Do you cover smaller places like St Mary's Bay?
Yes. St Mary's Bay is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Do you take on second-fix sealing for builders?
Yes. We seal plots to the developer’s programme ready for handover. Tell us the plots and the joints involved for a clear quote.
How long before the joint can be used?
Different products cure at different speeds, so follow the cure time we give you when we finish.
What should I tell you?
Just the basics: where it is, what you’ve noticed and how we reach it. Then ring 0345 464 0079 or drop us an email.
Can you quote for more than one area?
Yes. Just list everything you need and we will quote it together.
Should I try DIY first?
You can, for simple jobs. Preparation is everything: all the old sealant out, and a clean, dry joint. If it doesn’t work out, we can redo it.
What does new build mastic cost?
Size, access and the old material all affect the cost. Ask us for a quote and we’ll talk you through it.
Nearby places to St Mary's Bay
Other services in St Mary's Bay
Leave it or put it right?
A hairline gap at a skirting can wait, but a leaking seal can’t. Not sure whether yours can wait? You can call 0345 464 0079 or drop us an email with a few pictures and we’ll give you a straight answer. Homes in smaller places like St Mary's Bay can face more weather, and failed outside joints let damp into walls. Indoors, a failed seal lets water into floors and panels as it would anywhere.
What you pay reflects the work, not a rough estimate. That is why we ask about the job first.
Why us?
- Any old sealant cut out fully, not covered over
- Full insurance on every job
- We agree the colour with you first
- Sealant colour chosen to suit
See our cost guide and customer reviews.
New build mastic in St Mary's Bay: local notes
St Mary's Bay is within about 1 mile of the coast. Plot mastic on new homes near the coast takes more weather than it would inland, so it’s worth checking at snagging. The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
In and around St Mary's Bay, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint.
St Mary's Bay is about 6 miles south-west of Hythe, in Kent. We provide new build mastic to homes and businesses in St Mary's Bay and nearby, as part of our work across Kent. Our Kent coverage runs to 922 places, and St Mary's Bay is one of them. Brighton is on our list too, around 50 miles away.
Work in TN29 works the same way as everywhere else we cover. Local streets include Maple Drive, Oak Drive and Beechwood Close, all of which we cover. We also cover St Mary in the Marsh (1 mile west), Burmarsh (3 miles north), Newchurch (3 miles north-west), Postling Green (5 miles north) and Bonnington (6 miles north). We also work in nearby towns such as Ashford (10 miles north-west), Folkestone (10 miles north-east), Hythe (6 miles north-east), Hawkinge (11 miles north-east), Tenterden (13 miles west) and Cheriton (9 miles north-east).
Local landmarks in St Mary's Bay
We work in homes and buildings around Romney Warren Country Park and the streets around them. Other landmarks nearby include Romney 'castle' (3.6 miles west).
Surface by surface
Plot handovers
Taking time over preparation reduces return visits. We clean out building dust before sealing and primer used where needed.
Bathrooms and en suites
New-build bathrooms and en suites are where sealant fails most often. The old sealant comes out and anti-fungal sanitary silicone goes in after cleaning and priming.
Keeping the joints in good condition
Simple care keeps the joints in good condition. Our advice:
- Record problems with dated pictures
- Ventilate bathrooms well, especially in the first year
- Act quickly if a seal starts to leak
- Put sealant faults on your snagging list early
Keep pictures of the joints and any snagging correspondence with your builder. It’s useful if you need to raise other issues later.
Lifting sealant traps moisture and mould behind it. Dealing with it before it goes black saves a harder job later.
What we are called out for in St Mary's Bay
Baths and trays settle under load once the home is lived in. If a bath wasn’t filled when it was sealed, the bead is stretched the first time it’s used and the sealant may split.
It’s worth asking for a quote if you see:
- Gaps opening as the house dries out and settles
- Kitchen sealant that has pulled off the wall
- Leaking shower tray seals in a new home
- Second-fix sealing on new plots
For jobs in and around St Mary's Bay, choosing the right material for each joint is as important as a tidy finish.
What your quote should include
- What guarantee comes with the work
- Is VAT in the price?
- When the joint can take water or movement
- Who does the work, and how experienced they are
When it isn’t the sealant
We will always be straight with you, so here’s what new sealant will not do:
- Your warranty claim itself, which is between you and the builder
- Leaks from pipes, valves or wastes, which need a plumber
- Damaged fittings that need replacing
If in doubt, phone 0345 464 0079 or send us an email and we will say what we think.
Where we work in St Mary's Bay
- Show homes
- Windows & doors
- Kitchens
- Bathrooms & en suites
- Skirting & floors
- Plot handovers
Should I try it myself first?
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions.