East Sussex · England
New-build mastic & snagging in South Heighton, East Sussex
Plot mastic for developers and snagging failed sealant in new homes for South Heighton, backed by a one-year guarantee. Ask us for a quote.
- Second-fix sealing on new plots
- Untidy sealant flagged on a snagging list
- Sealant that never bonded to the surface
What we can’t put right
Honest advice matters more to us than a booking, so here’s what sealant can’t fix:
- Leaking fittings rather than failed sealant
- A tray or bath that isn’t properly supported, until it’s fixed
- Cracked trays, tiles or worktops
Not sure which it is? You can ring 0345 464 0079 or email us and we will tell you honestly before booking.
Where we work in South Heighton
- Windows & doors
- Bathrooms & en suites
- Plot handovers
- Skirting & floors
- Kitchens
- Show homes
How we handle new build mastic in South Heighton
Some owners wait for the first year’s movement before having joints redone. That makes sense for small gaps that are just cosmetic, but a failed shower or bath seal shouldn’t wait. If you are dealing with sealant that never bonded to the surface and internal frame sealant that has split, we can help.
Older homes in small places like South Heighton often have timber floors that move with the seasons, which is why skirting and threshold joints need a flexible sealant, not filler.
The work is guaranteed for twelve months. If something is not right with it in that time, tell us and we’ll put it right.
- Place
- South Heighton (BN9)
- Region
- East Sussex
- Guarantee
- A year, on every job
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
More services for South Heighton
Landlord and commercial work in South Heighton
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements and we’ll quote.
If you manage several properties in or around South Heighton, several properties can go on one quote. Send us the addresses and the work at each.
Joints and finishes in South Heighton homes
South Heighton is within about 2 miles 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. London and the South East are among the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
If you’ve bought a new home near Newhaven Town station, the sealant around baths, showers and frames is worth checking in the first year or two.
South Heighton is about 1 mile north of Newhaven, in East Sussex. South Heighton gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. We cover 289 towns and villages across East Sussex, large and small. We also work in Brighton, around 8 miles away.
We cover every part of BN9 for new build mastic and the streets around it. Nearby, we also carry out new build mastic in Denton (1 mile south), Piddinghoe (1 mile west), Rodmell (3 miles north-west), Telscombe (3 miles west) and Firle (3 miles north). Larger places within reach include Eastbourne (10 miles east), Seaford (3 miles south-east), Lewes (5 miles north-west), Hailsham (10 miles north-east), Uckfield (11 miles north) and Polegate (8 miles east).
Near you in South Heighton
Typical jobs here are in homes near Castle Hill, Hampden Arms and UTC@Harbourside. The nearest railway station is Newhaven Town station, roughly 0.8 miles south. Other landmarks nearby include Planet Earth Museum (less than half a mile south-west) and Arlington Castle (4.8 miles east). Open spaces near South Heighton include Itford Hill and Southerham Farm.
Should I try it myself first?
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.
If you’ve already had a go yourself, that is fine. We cut it out and start again.
What happens if it’s left?
It often makes sense to do all the sealant items on a snagging list together. You get one visit and one clear quote. Older cottages and farmhouses around South Heighton can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
Every job is a little different, so we quote each one individually. Size, access and the product the joint needs all play a part, and we will explain the quote if you ask.
What you get with us
- A 12-month guarantee on all work
- Experience in homes, commercial sites and hotels
- Over 20 years’ experience
- We’re fully insured
See how sealant jobs are priced and our reviews.
How it works
There is not much for you to do on the day. Show us the job and we’ll take it from there. The job generally takes a few hours for most snagging lists, longer for a run of plots from start to finish. Somewhere as small as South Heighton, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We look at why each joint failed, including any movement.
- We remove the failed sealant and clean the joints.
- We make sure the joints are dry and prime them if needed.
- Baths are filled with water, then the new sealant is applied.
- We check every joint and leave you with the cure times.
How to prepare
- Clear items away from the joints we’re working on
- Tell us about access, such as stairs, a lift or high-level joints
- Mention any leaks or damp you’ve noticed
How to get a quote
We quote each job on its own, so the first step is telling us about yours. Just ring 0345 464 0079 or send us an email with the details, and photos are welcome.
Advice
Keeping the joints in good condition
Simple care keeps the joints in good condition. We recommend:
- Do not wait for the house to settle if water is getting through
- Avoid scourers and strong chemicals on sealant
- Follow the cure time we give you
- Put sealant faults on your snagging list early
Keep the bathroom ventilated, especially in the first year. Use the extractor fan or open a window after showers.
Leave a failed new-build seal and water can reach the floor and the ceiling below. Catching it early keeps the fix to the sealant.
Questions from South Heighton
Is South Heighton in your area for new build mastic?
Yes, South Heighton is within the area we cover. Our work covers London and the South East. You can call 0345 464 0079 or drop us an email and tell us what needs doing, and we’ll give you a clear quote.
Can you help a landlord with a rental near Newhaven Town station?
Yes, rental work is part of what we do. Just ring 0345 464 0079 or email us and tell us about the property, and we will give you a clear price.
Is there a guarantee?
Yes. Each job is guaranteed for twelve months, wherever you are.
Is it normal for sealant to crack in a new home?
There are usually two causes: movement as the house dries and settles, and sealant laid onto dust without primer. Cutting it out and resealing properly fixes both.
Should I go to my builder first?
Start with the builder if you are in the snagging or warranty period. Once that’s done, or if they won’t put it right, we can reseal it properly.
Are you an approved applicator?
Yes. Mr Mastic is an ARBOMaster approved applicator, and we are fully insured.
Do you take out the old sealant first?
Yes. We cut out all the old sealant and clean the joint.
What information do you need?
Where the job is, what the problem is and roughly how big it is. Photos by email help too.
When to call us in South Heighton
When the heating goes on in the first winter, the house dries fast. Gaps open along skirting, frames and worktops and cracks appear in the sealant.
The most common problems we see are:
- Skirting joints opening in the first winter
- Sealant work across a run of new homes
- Sealant applied over dusty or wet surfaces
- Untidy sealant flagged on a snagging list
In and around South Heighton, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint.
Questions to ask before you book
- Who turns up on the day
- What the cure time is
- How the joint is cleaned and prepared
- How hidden problems are handled