Hampshire · England
New-build mastic & snagging in St Leonards, Hampshire
Plot mastic for developers and snagging failed sealant in new homes for homes and businesses in St Leonards and across Hampshire. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- Gaps between new skirting and floors
- Smeared, uneven beads picked up at snagging
- Beads laid onto grit and dust from the build
What we do, step by step
On the day, we look over the joints with you first. We protect the surfaces around the joints before any work begins. The work usually takes a few hours in a single home. In a smaller place like St Leonards, parking is seldom the issue; lanes, gates and long drives are worth mentioning. 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.
Before we arrive
- Plan for the work area to be out of bounds to pets and children
- Move anything stored near the joints
- Mention any parking rules near the property
How to get a quote
It all starts with a short chat. Describe the problem, the location and the size of the job, and we will talk you through what we’d do. When it suits you, phone 0345 464 0079 or email us.
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New build mastic in St Leonards, done properly
A new house keeps drying out and settling for its first couple of years. Timber shrinks, plaster dries and baths and trays bed down, so sealant that was laid quickly before handover often cracks. If you have plot mastic for developers ahead of handover and gaps opening as the house dries out and settles, we can help, on bathrooms & en suites, windows & doors and kitchens alike.
Where new homes go up in smaller places like St Leonards, 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.
A one-year guarantee comes as standard, so you are not left on your own once the job is done.
- Place
- St Leonards (BH24)
- Region
- Hampshire
- Cover
- One year on every job
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Nearby places to St Leonards
More services for St Leonards
How to look after the new joints
No joint lasts for ever, but care makes a real difference. A few tips:
- Put sealant faults on your snagging list early
- Look at the sealant regularly in the first couple of years
- Get a leaking seal dealt with straight away
- Wait for the cure time before using a resealed shower
Wipe the sealant with warm soapy water. Avoid abrasive pads and strong solvents.
The sooner you deal with untidy or cracking sealant, the less there is to put right. Small faults turn into leaks if left in a busy bathroom.
What the job involves on each surface
Show homes
Show homes need sealant that looks right from day one. We lay neat, even beads in colours to suit the finishes.
Kitchens
Worktops in new homes can move slightly as the house dries, opening gaps behind the upstand. We reseal them with a flexible sealant.
New homes and floors in St Leonards
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.
For jobs in and around St Leonards, choosing the right material for each joint is as important as a tidy finish.
St Leonards is in Hampshire. Homes, rented property, offices and hotels in St Leonards can book us for new build mastic, old or new, large or small. The work is guaranteed for a year. St Leonards is one of 683 towns and villages in Hampshire where we work for new build mastic. There’s also a page for Southampton, roughly 21 miles from St Leonards.
We work across the BH24 postcode area for new build mastic and the streets around it. We cover properties on Cedar Avenue, Birch Close and Malmesbury Road and the roads around them. We also cover the places around St Leonards: Ashley Heath (1 mile north), St Ives (1 mile north-east), Matchams (1 mile south-east) and Avon Castle (2 miles east). Within a short drive, we also cover Lymington (14 miles east), New Milton (10 miles south-east), Ringwood (3 miles north-east), Barton on Sea (10 miles south-east), Ashley (10 miles south-east) and Milford on Sea (13 miles south-east).
What’s near St Leonards
We work in homes and buildings around Avon Heath Country Park, among other places. A little further out are St Leonard's Hospital (0.9 miles south-west) and Stapehill Abbey (3.9 miles south-west). Open spaces near St Leonards include Linbrook Lake and Blashford Lakes.
DIY versus a professional finish
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions.
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.
Landlord and commercial work in St Leonards
From a single let to a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a one-year guarantee.
Hotels need rooms back in use, so the work can be planned room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
St Leonards: your questions answered
Is St Leonards in your area for new build mastic?
Yes, St Leonards is within the area we cover. Our work covers London and the South East. Just ring 0345 464 0079 or drop us an email with a few details of the job.
Is there a guarantee on new build mastic in St Leonards?
All our work, in St Leonards and everywhere else, comes with a 12-month guarantee. We are fully insured, and an ARBOMaster approved applicator.
Do the sealants smell?
Possibly a little. Any smell clears as the sealant cures.
Can you match the sealant colour to my new kitchen or bathroom?
It depends on the joint: white or clear in most bathrooms, and a colour to suit worktops, frames and floors elsewhere. We will agree it with you first.
Do you take out the old sealant first?
Yes. We cut out all the old sealant and clean the joint before applying anything new.
Can landlords and businesses book you?
Yes, regularly. Several properties can be quoted together.
Do you work through snagging lists?
Yes. Send us the sealant items on the list, with pictures if you can, and we’ll quote. We will flag anything that needs another trade.
Do you do commercial work?
Yes. We’ve worked for hotels, offices and other businesses.
Signs you need new build mastic in St Leonards
Later trades and the final clean can damage fresh sealant. A bead disturbed before it has cured may never seal properly, and the problem shows up after you move in.
Most people get in touch after spotting something like this:
- Sealant that never bonded to the surface
- Messy sealant that spoils new finishes
- Gaps behind new kitchen upstands
- Shower seals failing in the first year or two
Around St Leonards, as everywhere, new build mastic is only as good as the preparation behind it.
What to look for in a quote
- Is VAT in the price?
- What preparation is included
- What the cure time is
- Whether you can choose the colour
Why deal with it now?
A tube of sealant from the DIY shop won’t fix the cause: dust, no primer and old sealant left in the joint. Proper removal and preparation are what make it last. In a smaller place like St Leonards, wherever a wall is exposed, a failed outside joint is a real source of damp. Inside, a split seal lets water into floors and panels just as it would anywhere.
Instead of a standard rate, we look at what your job involves: the amount of work, the old material and the access. The price is agreed before we begin.
Why St Leonards customers choose us
- White, clear, grey or coloured to suit, where the product allows
- We agree the colour with you first
- ARBOMaster approved applicator
- 180+ five-star Google reviews
See what affects the cost and customer reviews.