Kent · England
New-build mastic & snagging in River, Kent
Our applicators work in River on plot mastic for developers and snagging failed sealant in new homes. Old sealant removed completely, joints prepared properly and every job guaranteed for a year.
- Untidy sealant flagged on a snagging list
- Cracked sealant around new window and door frames
- Shower seals failing in the first year or two
About our new build mastic in River
New homes move as they dry out. Timber shrinks, plaster dries and baths and trays bed down, so sealant that was laid quickly before handover often cracks. We work on show homes, skirting & floors and kitchens, and the jobs we see most are kitchen sealant that has pulled off the wall and skirting joints opening in the first winter.
In smaller places like River, new homes tend to come as small developments or single plots. Each still needs its sealant and floor joints finished properly from day one.
The work is covered for a year after we finish. If anything isn’t right with it, ring 0345 464 0079 or send us an email.
- Where
- River (CT17, CT16)
- Region
- Kent
- Cover
- 12 months on all our work
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Keeping the joints in good condition
Looking after new joints is easy:
- Wait for the cure time before using a resealed shower
- Avoid running a DIY bead over the old one
- Clean sealant with mild detergent, not abrasives
- Watch for new gaps as the house dries out
Keep photos 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. Early resealing keeps the job small and the new finishes intact.
What affects the cost of new build mastic
The price is agreed before any work begins. It takes into account:
- The number and length of the joints
- How many rooms, windows or areas are involved
- Any mould that needs treating
- How easy the joints are to reach
A failed joint rarely gets cheaper to fix by waiting. If you are not sure whether it needs doing, call 0345 464 0079 or email us for an honest opinion and a quote.
Helping us quote
To help us quote quickly, let us know:
- How we’d reach the joints
- Whether it’s a home or a business
- Whether it has been sealed before
- Pictures of the joints, sent by email
There’s no standard price list, as no two jobs are quite the same. Instead, your job gets its own clear quote. To arrange one, phone 0345 464 0079 or email us.
New build mastic in River: local notes
River is close to 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.
Around River, as everywhere, new build mastic is only as good as the preparation behind it.
River is about 1 mile north-west of Dover, in Kent. Whether you are in the middle of River or further out, we cover new build mastic for every kind of property. Our Kent coverage runs to 922 places, and River is one of them. There’s also a page for Chelmsford, roughly 53 miles from River.
Every address in CT17 and CT16 is within our area for new build mastic, from the main roads to the quietest streets. If you need new build mastic at a property on Lower Road, Minnis Lane and London Road or anywhere close by, we can help. Nearby, we also carry out new build mastic in Kearsney (1 mile north-west), Temple Ewell (1 mile north-west), Dover (1 mile south-east), Whitfield (1 mile north-east) and Maxton (2 miles south). Within a short drive, we also cover Canterbury (13 miles north-west), Folkestone (6 miles south-west), Ramsgate (15 miles north-east), Deal (7 miles north-east), Hythe (10 miles south-west) and Walmer (7 miles north-east).
Landmarks near River
Typical jobs here are in homes near St Edmund's Catholic School, Old Park Hill and Royal Oak Cottage The Royal Oak Public House and the streets around them. The nearest railway station is Kearsney station, about 0.5 miles north-west. A little further out are Crabble Corn Mill (less than half a mile south-east) and Dover Castle (2.2 miles south-east). Green spaces nearby include Dover Western Heights.
Surface by surface
Windows and doors
On new builds, external frame sealant can be patchy. We reseal it with a weatherproof, flexible sealant.
Kitchens
Beside the sink, the joint takes water every day. We use a sealant suited to kitchens.
What we are called out for in River
On many sites, sealant goes on in the final rush before handover. Joints are not always cleaned of dust or primed, so the bead never bonds properly.
Keep an eye out for these signs:
- Cracked caulk along new skirting
- Cracks appearing as a new home settles
- Sealant applied over dusty or wet surfaces
- Smeared, uneven beads picked up at snagging
For new homes near Kearsney station, it’s worth checking the sealant early, while snags are still fresh.
Before you book anyone
- How long the guarantee is
- When the joint can take water or movement
- What preparation is included
- Which colour the sealant will be
River questions
Can you do new build mastic in River?
Yes. Our work covers London and the South East, and River is part of that. You can call 0345 464 0079 or drop us an email and tell us what needs doing.
I let a flat near Kearsney station. Can you help?
Yes, rental work is part of what we do. You can ring 0345 464 0079 or drop us an email with the address and a few details, and we’ll give you a fixed price before work begins.
Will there be a smell?
That depends on the sealant. Some smell for a while, some hardly at all.
Can you do plot mastic on a new development?
Yes. We seal plots to the developer’s programme, room by room. Tell us the plots and the joints involved and we’ll quote.
Is there a guarantee?
Yes: twelve months. If there’s a problem with our work in that time, tell us and we will put it right.
How long will you be here?
A typical job takes anything from a few hours to several days, depending on the number of plots, including the preparation. We will confirm how long when we quote.
When is the sealant fully cured?
That depends on the sealant used, so follow the cure time we give you.
Which products do you use?
Quality sealants from brands including Arbo and Everbuild, picked for each joint. We explain the product when we quote.
What else we do in River
Landlord and commercial work in River
Failed sealant is one of the commonest items on a check-out report, and it’s quick to put right between tenancies. Several properties can go on one quote.
Letting agents and landlords in River can book us as well as homeowners. Sealant work between tenants is a simple way to keep a property in good order.
What happens on the day
Good joint work is mostly preparation, so that’s where we spend the time. Every joint is cleaned and dried before new material goes in. All told, the work takes a few hours for most snagging lists, longer for a run of plots. A visit to River is planned like any other: the time, the access and where to park are agreed in advance. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- We go through the snagging list or plot schedule and agree the joints to do.
- The old bead comes out in full, with no layer left behind.
- We clean off dust from the build and prime the surfaces where the product needs it.
- New sealant suited to each joint is applied and tooled neatly.
- Finally, each room is checked and you are given the cure time.
Getting ready for the visit
- Let us know about parking restrictions
- Clear the area around the work
- Where the joints are inside, avoid wetting them before we arrive
Get a quote
Want a quote for new build mastic? Please phone 0345 464 0079 or send us an email with a few details. We’ll explain what we’d do and give you a clear price before work begins.
Read more
Why act early in River
Sealant done properly at handover means fewer callbacks. Every return visit for a failed seal takes time and most come down to preparation. Around River, water from a failed joint in an older home can soak into timber and plaster, and that’s a much bigger job than renewing the sealant.
The cost depends on the size of the job, how hard the old material is to remove and access to the work. You’ll have a clear quote before any work starts.
Why River clients choose us
- Quality sealants from Arbo and Everbuild
- Over 20 years’ experience
- Every job guaranteed for a year
- A choice of colours where the product allows