East Sussex · England
New Build Mastic in Lewes
New build mastic across Lewes and nearby, with old sealant always removed completely and a one-year guarantee.
- Cracks appearing as a new home settles
- Untidy sealant flagged on a snagging list
- Frame joints opening as the plaster dries
New build mastic in Lewes
Some owners wait for the first year’s movement before having joints redone. For small cosmetic gaps, that’s reasonable, but a seal that’s letting water through needs doing now. We’re often asked to deal with gaps between new skirting and floors and untidy sealant flagged on a snagging list, on show homes, kitchens and windows & doors.
Homes around Lewes move a little with the seasons, and skirting and floor joints show it first. Those joints need a flexible sealant, as rigid filler soon cracks out.
We stand behind the work with a 12-month guarantee, so you are not left on your own once the job is done.
- Place
- Lewes (BN7, BN8, BN6, RH15)
- Region
- East Sussex
- Guarantee
- 12 months on all our work
- Quote
- Quoted before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Landlord and commercial work in Lewes
Mouldy or split sealant often shows up at the end of a tenancy. We can quote for more than one property at once.
We also work for property managers and facilities teams. Several sites can be quoted together.
What new build mastic looks like in Lewes
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.
If you’ve bought a new home near Lewes station, the sealant around baths, showers and frames is worth checking in the first year or two. In and around Lewes, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint.
Lewes is about 7 miles north-east of Brighton, in East Sussex. From the centre of Lewes to the outskirts, new build mastic is available for homes and businesses alike. Our area takes in 289 places across East Sussex, large and small. Brighton is on our list too, around 7 miles away.
Work in BN7, BN8, BN6 and RH15 is quoted and booked the same way as anywhere else. We cover properties on Market Lane, Market Street and High Street and the roads around them. Lewes is on the A26 and A275, which makes it straightforward to reach. Other places close to Lewes include South Malling (1 mile north-east), Southover (1 mile south-east), Cliffe (1 mile east), Offham (1 mile north-west) and Hamsey (1 mile north). We also work in nearby towns such as Eastbourne (14 miles south-east), Seaford (8 miles south-east), Hailsham (11 miles east), Crowborough (14 miles north-east), Uckfield (8 miles north-east) and Newhaven (6 miles south). Lewes is among the bigger towns we cover in East Sussex.
What’s near Lewes
Typical jobs here are in homes near Priory School, St Pancras Catholic Primary School and Railway Land, among other places. The closest station to Lewes is Lewes station, about 0.6 miles south-east of the centre. A little further out are Lewes Victoria Hospital (0.5 miles west) and Museum of Agricultural Bygones (3.9 miles east). Not far away are Offham Hill and Malling Down.
What we cannot put right
A few problems are outside what sealant work can do:
- Baths and trays that move too much for sealant to cope with
- Damaged fittings that need replacing
- Leaks from pipes, valves or wastes, which need a plumber
If in doubt, ring 0345 464 0079 or email us and we’ll say what we think.
Surfaces we seal
- Kitchens
- Plot handovers
- Skirting & floors
- Show homes
- Bathrooms & en suites
- Windows & doors
Common questions in Lewes
Can you do new build mastic in Lewes?
Yes, Lewes is within the area we cover. Our work covers London and the South East. You can call 0345 464 0079 or email us and let us know what needs doing, and we’ll give you a clear price.
Can you help a landlord with a rental near Lewes station?
Yes. We work for landlords and agents as well as householders. You can ring 0345 464 0079 or email us with the details for a clear quote.
How long does the job take?
A typical job takes a few hours for most snagging lists, longer for a run of plots, including the preparation. We will confirm how long when we quote.
Can you reseal over the builder’s sealant?
No. Sealing over old sealant looks fine for a few weeks, then lifts. We remove every bit of the old bead before resealing.
What sealant do you use?
Quality sealants from brands including Arbo and Everbuild, chosen to suit the joint. We’ll tell you what we’re using and why.
How long before the joint can be used?
That depends on the sealant used, so please follow the time we give you.
Do the sealants smell?
It depends on the product. Some products have a noticeable smell, others very little, and any smell fades as they cure.
Is it normal for sealant to crack in a new home?
It’s common, and there are generally two reasons: the house moving as it dries, and sealant that never bonded properly. Cutting it out and resealing properly fixes both.
Different surfaces, different methods
Show homes
Bathrooms, kitchens and frames in show homes are sealed or resealed to a neat finish. Tell us when the home is open so we can plan around it.
Kitchens
Worktop, upstand and sink joints in new kitchens often get a hurried bead. We take it out and reseal neatly, colour-matched where it shows.
Aftercare tips
To keep the joints looking good and working properly:
- Photograph failed sealant before it’s redone
- Get a leaking seal dealt with right away
- Report sealant problems to your builder during the snagging period
- Keep water off fresh sealant until it has cured
Keep pictures of the joints and any snagging correspondence with your builder. It helps if anything else comes up during the warranty period.
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 and protects the rest of the house.
Should I try it myself first?
A DIY attempt doesn’t rule out a professional job. We cut it out and start again, so just mention it when you contact us.
If you are set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.
Nearby places to Lewes
More services for Lewes
What happens if it’s left?
A failed shower or bath seal in a new home lets water into floors and walls that are still drying out. Dealing with it early keeps the damage away from ceilings, floors and finishes. Gaps in sealant and mould in the bead never get better on their own, and in a busy home in Lewes they get worse with every use. Replacing the sealant now is the simplest fix.
What you pay reflects the work, not guesswork. That is why we ask a few questions first.
Why Lewes clients choose us
- Sealant colour chosen to suit
- Any old sealant cut out fully, not covered over
- 180+ five-star Google reviews
- Tidy, careful work
Read how sealant jobs are priced and our reviews.
What happens on the day
Before we leave, we go over the finished joints with you. The work normally takes a few hours in a single home, depending on how much there is to do. For a job in Lewes, we need access to where the work is and somewhere nearby to park. For outside work, let us know about side access, gates and any upper-floor joints.
- We go through the snagging list or plot schedule and agree the joints to do.
- Failed or untidy sealant is cut out completely.
- We clean off dust from the build and prime the surfaces where the product needs it.
- We apply a sealant that suits each joint and tool it to a neat finish.
- Finally, each room is checked and you are given the cure time.
Before we arrive
- Tell us about any water getting in
- Tell us if parking is tricky
- Keep pets and children clear of the area while we work
How to get a quote
The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is.