Kent · England
Greenhithe New Build Mastic
Plot mastic for developers and snagging failed sealant in new homes for Greenhithe, backed by a 12-month guarantee. Ask us for a quote.
- Frame joints opening as the plaster dries
- Smeared, uneven beads picked up at snagging
- Sealant that never bonded to the surface
New build mastic in Greenhithe
Failed shower seals, gaps along the skirting and messy beads are common items on a new-home snagging list. If you’re still within the builder’s snagging or warranty period, tell them first and if that stalls, we can do it. If you have sealant work across a run of new homes and sealant that never bonded to the surface, we can help, whatever the surface.
Homes around Greenhithe range from older cottages to newer houses, and their floors range just as widely, from timber that moves with the seasons to tiles laid on concrete. Skirting and threshold joints need a sealant that suits the floor.
We stand behind the work with a 12-month guarantee, so you’re not left on your own once the job is done.
- Place
- Greenhithe (DA9, DA10)
- Region
- Kent
- Guarantee
- A year, on every job
- Price
- A clear quote up front
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
New build mastic around Greenhithe
Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
For new homes near Greenhithe for Bluewater station, it’s worth checking the sealant early, while snags are still fresh. In and around Greenhithe, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint.
Greenhithe is about 3 miles east of Dartford, in Kent. Greenhithe gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a 12-month guarantee. Our Kent coverage runs to 922 places, and Greenhithe is one of them. Our London page covers work nearby.
Our applicators cover all of DA9 and DA10 for new build mastic. If you need new build mastic at a property on Bean Road, The Avenue and Abbey Road or a nearby road, we can help. With the A206 close by, Greenhithe is simple for us to get to for new build mastic. Other places close to Greenhithe include Swanscombe (1 mile south-east), Stone (1 mile south-west), Bean (2 miles south), West Thurrock (2 miles north) and Darenth (2 miles south-west). Further out, we also cover Dartford (3 miles west), Sevenoaks (12 miles south), Gravesend (4 miles east), Northfleet (3 miles south-east), Swanley (6 miles south-west) and Kings Hill (13 miles south-east).
Local landmarks in Greenhithe
Locally, jobs take us to homes and businesses close to Castle Hill Park, The Ebbsfleet Academy and The White Hart Public House, among other places. Greenhithe has its own railway station: Greenhithe for Bluewater station. A little further out are Darent Valley Hospital (1.5 miles south-west) and Stone Museum of Geology (1.8 miles west). Not far away are Chafford Gorges Nature Park and Sawyers Lake.
Greenhithe questions
Is Greenhithe in your area for new build mastic?
Yes. We work across London and the South East, and Greenhithe is part of that. Just ring 0345 464 0079 or drop us an email with a few details of the job, and we will give you a clear quote.
Do you cover smaller places like Greenhithe?
Yes, Greenhithe is covered. We work across London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
Can you reseal over the builder’s sealant?
No. The old sealant is cut out fully, the joint cleaned and primed where needed, before resealing.
How much does new build mastic cost in Greenhithe?
The cost depends on the size of the job, access and how much old sealant has to come out. Call for a quick quote.
Should I wait before resealing?
Any seal that is leaking should be redone right away. Cosmetic gaps can wait until the first year or two of movement has passed.
How long should I leave it?
Different products cure at different speeds, so follow the cure time we give you when we finish.
Will you leave a mess?
Tidy work is part of the job. We protect what’s around the joints, and we clear up when we’re done.
Why does sealant fail so quickly in new builds?
Cracking in the first couple of years is common. Poor preparation at handover adds to it.
Also near Greenhithe
More services for Greenhithe
What sealant work cannot fix
It helps to know what we can’t do too:
- Movement caused by a poorly fitted tray or bath
- Settlement cracks that need a surveyor
- Damaged fittings that need replacing
If you’re not sure, just ring 0345 464 0079 or drop us an email and we will give you a straight answer.
What we seal
- Plot handovers
- Show homes
- Skirting & floors
- Bathrooms & en suites
- Kitchens
- Windows & doors
What the job involves on each surface
Kitchens
Beside the sink, the joint takes water every day. We use a sealant suited to kitchens, food-safe where it’s needed.
Bathrooms and en suites
New-build bathrooms and en suites are where sealant fails most often. The old sealant comes out and anti-fungal sanitary silicone goes in after cleaning and priming.
Why it’s worth doing now in Greenhithe
It often makes sense to do all the sealant items on a snagging list together. It’s one visit, one quote and one set of cure times. In a smaller place like Greenhithe, wherever a wall is exposed, a failed outside joint is a real source of damp. Indoors, a failed seal lets water into floors and panels as it would anywhere.
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether the work is at height. We take all of that into account in your quote.
What you get with us
- A sealant colour to suit the surroundings
- Arbo and Everbuild products
- Over 20 years’ experience
- A choice of colours where the product allows
Read what affects the cost and customer reviews.
Should I try it myself first?
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
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.
How the visit works
All our tools and materials come with us in the van, so there’s nothing for you to buy. After a quick look at the joints together, we protect the area and start. It normally takes anything from a few hours to several days, depending on the number of plots. Parking around Greenhithe is generally easier than in a town centre, but mention any lanes, gates or long drives. If the job is outside, tell us about side access and how high the joints are.
- We go through the snagging list or plot schedule and agree the joints to do.
- Failed or untidy sealant is cut out completely.
- Surfaces are cleaned of building dust and primed where needed.
- A sealant chosen for each area goes in and is tooled smooth.
- Each area is checked and left with its cure time.
Getting ready for the visit
- Mention any tricky access
- Tell us about any previous sealing or DIY attempts
- Mention any leaks or damp you’ve noticed
Getting a quote
There’s no standard price list. Instead, we give you a clear quote for your job. To get started, ring 0345 464 0079 or drop us an email.
Advice
Landlord and commercial work in Greenhithe
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance.
How to look after the new joints
Once the sealant has cured, a few habits help it last:
- Wait for the cure time before using a resealed shower
- Act quickly if a seal starts to leak
- Avoid scourers and strong chemicals on sealant
- Report sealant problems to your builder during the snagging period
Don’t stand on the bath edge or the lip of the tray in the first few weeks. Report any movement in a bath or tray.
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.