East Sussex · England
New-build mastic & snagging in St Leonards, East Sussex
Specialist new build mastic for St Leonards: the right sealant, proper preparation and a neat finish. Ask us for a quick quote.
- Joints pulling apart as timber shrinks
- Messy sealant that spoils new finishes
- Sealant that never bonded to the surface
How the visit works
Our applicators work methodically: protection first, then preparation, sealing and a tidy-up. For most jobs that takes anything from a few hours to several days, depending on the number of plots, and the area is left clean. Parking in a town like St Leonards is usually straightforward, but tell us if there’s a driveway or any restrictions, and let us know if the work is upstairs, in a flat or up high outside.
- We go through the snagging list or plot schedule and agree the joints to do.
- We cut out every bit of the failed or messy sealant.
- Surfaces are cleaned of building dust and primed where needed.
- A sealant chosen for each area goes in and is tooled smooth.
- Finally, each room is checked and you are given the cure time.
How to prepare
- Plan for the work area to be out of bounds to pets and children
- Mention if the joints have been sealed before
- Let us know about parking restrictions
Getting a quote
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is, and we will explain how we’d tackle it. Whenever you are ready, ring 0345 464 0079 or send us an email.
Advice
About our new build mastic in St Leonards
Some owners wait for the first year’s movement before having joints redone. For small cosmetic gaps, that is reasonable, but a failed shower or bath seal shouldn’t wait. We work on bathrooms & en suites, show homes and skirting & floors, and the jobs we see most are shower seals failing in the first year or two and second-fix sealing on new plots.
Shops and business units around St Leonards have floors that see a lot of traffic. Threshold and floor joints are best resealed before their edges start breaking away.
There’s a 12-month guarantee on every job, large or small.
- Location
- St Leonards (TN38, TN37, TN34)
- Region
- East Sussex
- Cover
- 12 months on all our work
- Quotes
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Leave it or put it right?
Small cosmetic gaps can wait for the house to settle, but water getting through cannot. If you are unsure which you have, call 0345 464 0079 or email us with photos. Draughts from a gap round a frame, damp under a sill or water behind a bath panel all start small, and they’re far easier to fix early.
Doing several joints on one visit normally makes better use of the time than several visits, so tell us about everything that needs sealing. We will send you a clear quote for the lot.
Why book with us
- Domestic, commercial and hotel work
- We are fully insured
- An ARBOMaster approved applicator
- Colour agreed with you before we start
Honest limits
A few problems are outside what sealant work can do:
- Leaking fittings rather than failed sealant
- Cracked trays, tiles or worktops
- Structural cracks in walls or ceilings
If in doubt, call 0345 464 0079 or drop us an email and we’ll say what we think.
Surfaces we seal
- Show homes
- Kitchens
- Skirting & floors
- Windows & doors
- Bathrooms & en suites
- Plot handovers
What affects the cost of new build mastic
For a quick quote, just ask. What matters most is:
- The amount of work
- The number of rooms or windows
- Access and height
- The product the joint needs
Commercial jobs are quoted on the same basis as homes: the amount of work, how we reach it and what it needs. Ask us for a quote and we will go through it with you.
What we need to know
When you contact us, it’s useful to know:
- What the problem is, such as mould, gaps, leaks or cracking
- Roughly how big the job is
- Where the property is
- The type of property
For a quick quote, get us on the phone, or send an email if you’d rather. Tell us about the joints that need doing and we’ll explain what’s involved.
Common problems we fix in St Leonards
Fresh sealant can be knocked or cut by trades finishing off. A bead disturbed before it has cured may never seal properly.
If you can see any of these, it’s time to have the joints looked at:
- Joints pulling apart as timber shrinks
- Worktop and upstand sealant coming away
- Cracked caulk along new skirting
- Shower seals failing in the first year or two
For new homes near St Leonards Warrior Square station, it’s worth checking the sealant early, while snags are still fresh.
What your quote should include
- Which sealant they’ll use, and why
- How the colour is chosen
- Is the old sealant removed completely?
- Whether VAT is included
FAQs for St Leonards
Is new build mastic in St Leonards guaranteed?
All our work, in St Leonards and everywhere else, comes with a 12-month guarantee. We are also fully insured and ARBOMaster approved.
I let a flat near St Leonards Warrior Square station. Can you help?
Yes, we work for landlords and letting agents. You can phone 0345 464 0079 or email us with the address and a few details, and we’ll give you a fixed price before any work starts.
Is it worth resealing while the house is still settling?
It depends on whether water is getting through. A leaking shower or bath seal should be redone right away, but cosmetic gaps can wait for movement to slow.
Will you just run a new bead over the existing one?
No. Over-sealing traps mould and water and soon fails. All the old sealant comes out before we start.
What should I tell you?
The location, the problem and the rough size of the job. Photos by email help too.
What does new build mastic cost?
There’s no set price, as it depends on the job: its size, the old material, access and the product needed. We agree the price before any work begins.
Do I need to be at home?
For indoor joints, yes, someone needs to let us in. After that, you can carry on with your day.
Are you ARBOMaster approved?
Yes. Mr Mastic is an ARBOMaster approved applicator, and we are fully insured.
What new build mastic looks like in St Leonards
St Leonards 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 St Leonards, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint.
St Leonards is about 1 mile south-west of Hastings, in East Sussex. Homes, rented property, offices and hotels in St Leonards can book us for new build mastic, old or new, large or small. Every job comes with our 12-month guarantee. St Leonards is one of 289 places in East Sussex where we work. Our Brighton page covers work nearby (30 miles or so).
Our applicators cover all of TN38, TN37 and TN34 for new build mastic and the streets around it. That includes homes and businesses on Sea Road, Fern Road and Dane Road and the roads around them. St Leonards is on the A259 and A2102, which makes it straightforward to reach. We also cover the places around St Leonards: Silverhill (1 mile north), Hastings (1 mile north-east), America Ground (1 mile east), Bulverhythe (1 mile west) and Hollington (1 mile north). Larger places within reach include Eastbourne (13 miles south-west), Bexhill-on-Sea (4 miles west), Hailsham (13 miles west), Polegate (13 miles west), Old Town (14 miles south-west) and Heathfield (15 miles north-west). St Leonards is one of the larger places we cover in East Sussex.
Near you in St Leonards
Typical jobs here are in homes near University School, Horse And Groom Public House and Summerfields Wood. St Leonards has its own railway station: St Leonards Warrior Square station. Well-known places in the area include Priory Meadow Shopping Centre (1.2 miles east) and Conquest Hospital (2.2 miles north). Green spaces nearby include Church Wood and Robsack Wood and Senlac Hill.
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.
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.
Nearby places to St Leonards
Also in St Leonards
Looking after it afterwards
Once the sealant has cured, a few habits help it last:
- Raise failed sealant with the developer while you’re covered
- Clean sealant with mild detergent, not abrasives
- Get a leaking seal dealt with right away
- Do not seal over failed sealant yourself
Photograph failed sealant before it’s redone and keep the builder’s replies. It’s useful if you need to raise other issues later.
Mould takes hold quickly in sealant that has gaps or lifted edges. Resealing before mould gets in saves a harder job later.