Kent · England
New-build mastic & snagging in Hartley, Kent
New build mastic in Hartley from a team with over 20 years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Cracked sealant around new window and door frames
- Leaking shower tray seals in a new home
- Plot mastic for developers ahead of handover
New build mastic in Hartley
If your new home has a leaking shower seal, open skirting joints or untidy sealant, we can help. While the builder’s snagging or warranty period runs, report it to them first and if that stalls, we can do it. Common call-outs are for skirting joints opening in the first winter and joints pulling apart as timber shrinks, across show homes, plot handovers and skirting & floors.
Where new homes go up in smaller places like Hartley, it’s often a small development or a single plot. The sealant around baths, showers, frames and skirtings needs to be right from the start.
Every job is covered by a one-year guarantee.
- Location
- Hartley (DA3)
- Region
- Kent
- Cover
- One year on every job
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
What sealant work can’t fix
To be straight with you, some problems need a different trade:
- Leaking fittings rather than failed sealant
- Cracking that points to a structural problem
- Movement caused by a poorly fitted tray or bath
Not sure which it is? You can ring 0345 464 0079 or send us an email and we’ll tell you honestly before booking.
Surfaces we seal
- Skirting & floors
- Plot handovers
- Show homes
- Kitchens
- Windows & doors
- Bathrooms & en suites
How to look after the new joints
How long the joints last depends on use and care. Here’s what we suggest:
- Raise failed sealant with the developer while you are covered
- Use the extractor fan every time you shower
- Avoid scourers and strong chemicals on sealant
- Do not seal over failed sealant yourself
Photograph failed sealant before it’s redone and keep the builder’s replies. It helps if anything else comes up during the warranty period.
Early snagging is easier snagging. Small faults turn into leaks if left.
Questions from Hartley
Do you cover smaller places like Hartley?
Yes. Hartley is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Can you do new build mastic in Hartley?
Yes, Hartley is within the area we cover. Our work covers London and the South East. You can ring 0345 464 0079 or email us and tell us what needs doing, and we’ll send you a clear quote.
Can you do several jobs on one visit?
Yes. Tell us about everything you’d like done.
Do you guarantee your work?
Yes. Every job comes with our one-year guarantee.
I’m a tenant. Can you help?
We can work for tenants, landlords or agents. Just make sure your landlord agrees.
Can new sealant go on top of the old bead?
No. Fresh silicone does not stick to the old layer, so sealing over the top fails quickly. We cut the old bead out completely.
Should I try DIY first?
You can, for simple jobs. Preparation is everything: all the old sealant out, and a clean, dry joint. If it doesn’t work out, we can redo it.
Can you work on commercial sites?
Yes, regularly. Larger jobs can be planned room by room or area by area.
Joints and finishes in Hartley homes
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.
For new homes near Longfield station, it’s worth checking the sealant early, while snags are still fresh.
Hartley is about 4 miles south-west of Northfleet, in Kent. We carry out new build mastic for householders, landlords and businesses in Hartley and the surrounding area. Across Kent, we cover 922 places, Hartley among them. We also work in London, around 19 miles away.
Every address in DA3 is within our area for new build mastic. Local streets include Church Road, Dickens Close and Stack Lane, all of which we cover. Close by, we work in Longfield (1 mile north), New Barn (1 mile north-east), Longfield Hill (1 mile east), New Ash Green (1 mile south) and Nash Street (2 miles east). We also work in nearby towns such as Maidstone (13 miles south-east), Dartford (5 miles north-west), Sevenoaks (9 miles south-west), Gravesend (4 miles north-east), Tonbridge (13 miles south) and Northfleet (4 miles north-east).
Landmarks near Hartley
In Hartley, that means homes and buildings near Railway Tavern, Rectory Meadow and Longfield Academy. Hartley’s nearest station is Longfield station, roughly 0.8 miles north-west. Well-known places in the area include Darent Valley Hospital (4 miles north-west) and Stone Castle (4.1 miles north). For a walk, there’s Sawyers Lake.
Work for landlords, hotels and businesses
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
Mouldy or split sealant often shows up at the end of a tenancy, and it’s quick to put right between tenancies. Several properties can be quoted together.
What we do, step by step
The work is kept neat and contained to the area we are working on, so you can carry on as normal. The job usually takes a few hours for most snagging lists, longer for a run of plots, and we tell you how long to leave it before we go. A visit to Hartley is planned like any other: the time, the access and where to park are agreed in advance. If the work is outside, the weather plays a part, as sealant needs a dry surface.
- Each joint is checked for movement before we start.
- 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.
Getting ready for the visit
- Plan for the work area to be out of bounds to pets and children
- For business premises, tell us about site rules or sign-in
- Mention any parking rules near the property
Getting a quote
Getting a quote is simple: let us know the job and the location. A few pictures by email make the job easier to understand, and we will take it from there.
Related advice
Nearby places to Hartley
What else we do in Hartley
How we quote for new build mastic
Some jobs are bigger than they look, and some smaller. What affects the quote:
- Any mould that needs treating
- Access and height
- When we can work, for business premises
- The product the joint needs
A failed joint rarely gets cheaper to fix by waiting, because water and mould keep working on it. If you’re unsure, call 0345 464 0079 or send us an email and we will give you an honest view and a quote.
What we need to know
What to tell us when you ask for a quote:
- Roughly how big the job is
- Any access issues, like height or stairs
- The address or postcode of the job
- What’s wrong with the joints now
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints, and add pictures by email if you can.
What we’re called out for in Hartley
Not every new-build joint gets the right sealant: decorators’ caulk in a wet area, or a stiff sealant where there’s movement. Neither lasts long.
Common reasons people contact us include:
- Second-fix sealing on new plots
- Gaps behind new kitchen upstands
- Smeared, uneven beads picked up at snagging
- Frame joints opening as the plaster dries
Around Hartley, as everywhere, new build mastic is only as good as the preparation behind it.
Comparing quotes
- Whether the sealant suits the joint
- What insurance they hold
- How the colour is chosen
- Who turns up on the day
What happens if it’s left?
Sealant done properly at handover means fewer callbacks. Every return visit for a failed seal takes time, and they’re avoidable with good preparation. Around Hartley, water from a failed joint in an older home can soak into timber and plaster, which is far harder to put right than the sealant itself.
Instead of a standard rate, we look at what your job involves: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
Why Hartley clients choose us
- Experience in homes, commercial sites and hotels
- Full insurance on every job
- A choice of colours where the product allows
- Sealant colour chosen to suit