Kent · England
New-build mastic & snagging in Berwick, Kent
Plot mastic for developers and snagging failed sealant in new homes for homes and businesses in Berwick and across Kent. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Joints pulling apart as timber shrinks
- Internal frame sealant that has split
- Skirting joints opening in the first winter
How we handle new build mastic in Berwick
Snagging sealant properly means taking the failed bead out completely. Fresh silicone cannot bond to the old layer, so the joint is cut out, cleaned, dried and resealed. If you’re dealing with sealant that never bonded to the surface and new-build shower sealant that has already split, we can put it right.
Around Berwick, older homes often have timber floors that move through the year, so skirting and threshold joints need a flexible sealant rather than a rigid filler.
Every job is covered by a one-year guarantee.
- Place
- Berwick (CT21)
- Wider area
- Kent
- Cover
- One year on every job
- Price
- A clear price before work begins
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Why it’s worth doing now in Berwick
If you’re still in the builder’s snagging or warranty period, ask them to put it right first. If it keeps failing or isn’t dealt with, we can reseal it properly. Older cottages and farmhouses around Berwick can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
What it costs depends on how much there is to do, how much old material has to come out and how easy the joints are to reach. You’ll have a clear quote before any work starts.
What you get with us
- Homes, businesses and hotels
- 12-month guarantee on every job
- Fully insured
- Quality sealants from Arbo and Everbuild
Read what affects the cost and customer reviews.
Questions from Berwick
Is Berwick within the area you cover?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Do you work for landlords with property near Westenhanger station?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. Just phone 0345 464 0079 or drop us an email with the address and what needs doing, and we’ll send you a clear quote.
Is there any odour?
It depends on the product. Some smell for a while, some hardly at all.
Do you remove the old sealant?
Yes, every time. New sealant won’t bond properly to old, so any old material comes out before anything new goes in.
Is it normal for sealant to crack in a new home?
A new house dries and settles for a year or two, and sealant is often rushed onto dusty, unprimed surfaces. Both lead to early failure.
Do you take on second-fix sealing for builders?
Yes. We work through plots to your schedule ready for handover. Get in touch with the number of plots and the scope for a clear quote.
My new home is still under warranty. Should I contact you?
Report it to the builder first while you’re covered. If it isn’t resolved, we can reseal it properly.
How long should I leave it?
It depends on the product. Before we leave, we’ll tell you the cure time.
Surface by surface
Windows and doors
The gap between a new frame and its plaster reveal often opens up. We remove cracked sealant and apply a flexible one.
Kitchens
Sink joints are wet all the time. A kitchen sealant goes in there, food-safe where it’s needed.
How the visit works
Once we’re on site, we check the joints match what you told us. If we find something unexpected, we talk it through with you first. After that, the work takes a few hours for most snagging lists, longer for a run of plots. In a small place like Berwick, access is normally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- 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.
- New sealant goes in, with baths filled first so they’re at their heaviest.
- We check every joint and leave you with the cure times.
Getting ready for the visit
- Let us know if you’ve seen damp or leaks
- Let us know about parking restrictions
- Tell us about access, such as stairs, a lift or high-level joints
Ask for a quote
Asking for a quote is easy: let us know the job and the location, and roughly how big it is. Photos by email help us understand the job, and we will come back to you with a quote.
Read more
Signs you need new build mastic in Berwick
Sealant applied onto damp surfaces does not bond well. Site programmes do not always leave time for joints to dry before the sealant goes on.
The problems people normally mention when they call are:
- Internal frame sealant that has split
- Untidy sealant flagged on a snagging list
- Second-fix sealing on new plots
- Shower seals failing in the first year or two
If you’ve bought a new home near Westenhanger station, the sealant around baths, showers and frames is worth checking in the first year or two.
Comparing quotes
- Whether VAT is included
- Is the old sealant removed completely?
- Who turns up on the day
- How long to leave it before use
DIY versus a professional finish
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Sealing over old silicone is the commonest DIY error. New silicone will not bond to old, so it lifts and traps water and mould underneath. Everything old must be removed first.
New build mastic in Berwick: local notes
Berwick is within about 2 miles of the coast. New homes near the sea put their outside mastic to work from day one, so it’s worth checking at snagging. Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
In and around Berwick, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint.
Berwick is about 2 miles west of Hythe, in Kent. Our applicators cover new build mastic for homes and businesses in Berwick, as part of our work across Kent. Berwick is one of 922 places in Kent where we work for new build mastic. Chelmsford is on our list too, about 51 miles from Berwick.
Here we cover the CT21 postcode area for new build mastic. Whether your property is on Stone Street, Folks Wood Way and Honeywood Close or a nearby road, we can help. Close by, we work in Lympne (1 mile south-west), Newingreen (1 mile north-east), Westenhanger (1 mile north), West Hythe (1 mile south) and Pedlinge (1 mile east). Further out, we also cover Ashford (8 miles north-west), Canterbury (14 miles north), Dover (12 miles east), Folkestone (6 miles east), Tower Hamlets (12 miles east) and Hawkinge (6 miles east).
Around Berwick
Locally, jobs take us to homes and businesses close to Brockhill Park Performing Arts College, Sandling Park and The Royal Oak Public House, among other places. The closest station to Berwick is Westenhanger station, roughly 1 mile north of the centre. Well-known places in the area include Lympne Castle (0.7 miles south-west) and Hythe Museum (2.4 miles east). Not far away are Tolsford Hill.
For landlords and businesses
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance.
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements and we will quote.
Keeping the joints in good condition
After the cure time, these simple habits help:
- Wait for the cure time before using a resealed shower
- Do not seal over failed sealant yourself
- Avoid scourers and strong chemicals on sealant
- Act quickly if a seal starts to leak
Photograph failed sealant before it’s redone and keep the builder’s replies. It’s useful if you need to raise other issues later.
Report failed sealant to the builder while you’re in the snagging period. After that, putting it right may fall to you so report it promptly.