Kent · England
Window & door mastic in Newington, Kent
Specialist window mastic for Newington: careful preparation, the right product and tidy work. Call for a quick quote.
- Mastic that has split away from the wall
- Draughty joints inside around the window
- Black, perished sealant on frames
Leave it or put it right?
Not every sealant suits a window. Decorators’ caulk and bathroom silicone are not designed for outside joints that move. An exterior, low-modulus sealant stays flexible in sun and frost. Older cottages and farmhouses around Newington can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
Rather than a set price list, we price the job in front of us: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
What you get with us
- Rated 4.9 stars on Google
- Colour picked to suit the job
- You choose the colour before work begins
- A 12-month guarantee on all work
Read what affects the cost and what customers say.
Window mastic for homes and businesses in Newington
Every window and door frame has a gap around it, and mastic is what closes it. Once that seal fails, wind and rain find the gap. Our applicators cut it out and replace it with a flexible, weatherproof sealant. We work on uPVC windows, patio & French doors and composite doors, and people most often call us about a bead that doesn’t match the frame and water coming in at the bottom corners of a door.
Homes in small places like Newington often stand in the open, with little to shelter their windows from wind and rain. Exposed frames and sills lose their mastic sooner than sheltered ones.
Our work is backed for twelve months, in Newington and everywhere else we cover.
- Location
- Newington (CT18, CT20, CT19)
- Wider area
- Kent
- Cover
- A year, on every job
- Price
- Quoted before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
The process
There’s no need to move everything out before we come, just the space around the work. Everything nearby is protected, and the job takes a few hours for a handful of frames, longer for a whole house for a typical job. For a village or hamlet like Newington, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- We check how each frame can be reached safely.
- All the failed sealant is cut away, along with any loose debris.
- The surfaces are cleaned and left dry.
- Deep voids are backed, then the sealant is gunned in.
- The joint is shaped to shed water and the area tidied.
Getting ready for the visit
- Move anything stored near the joints
- Where the joints are inside, avoid wetting them before we arrive
- Let us know if you’ve seen damp or leaks
Get a quote
Getting a quote is simple: let us know what needs doing and where and its rough size. Photos by email help us understand the job, and we’ll take it from there.
Advice
Work for landlords, hotels and businesses
Whether it’s one flat or a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a 12-month guarantee.
Housing providers, facilities teams and property managers book us too in Newington and across Kent. We can quote a run of properties together, and we are fully insured for the work.
How the job changes by surface
Patio & French doors
Patio and French doors have the longest joints on most houses. Most leaks start at the bottom corners, so they get particular care.
Timber windows & doors
Wood swells when it’s wet and shrinks when it dries, so a flexible sealant is essential. The paint or stain needs to be sound where the sealant meets it.
More services for Newington
When to call us in Newington
Timber windows bring their own problems. Mastic painted over many times cracks with the paint, and the wood moves with damp as well as heat.
Common reasons people contact us are:
- Cracked or shrunken mastic around the frame
- Gaps where the sill meets the wall
- Sealant in the wrong colour for the frame
- Water coming in at the bottom corners of a door
For landlords with property near Folkestone West station, sound mastic around windows and doors keeps out the draughts and damp that tenants notice first.
Questions to ask before booking
- What product goes in the joint
- Is the old sealant removed completely?
- How the colour is chosen
- What happens if they find a problem under the old sealant
What affects the quote in Newington
We do not publish a price list, because jobs vary so much. The quote depends on:
- How easy the joints are to reach
- The size of the job
- Which sealant suits the joint
- Whether there’s mould to deal with
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 we need extra access for height. Your quote takes all of that into account.
What to tell us for a quote
When you call or email, it’s useful to know:
- Any access issues, like height or stairs
- The problem you’ve noticed
- A few photos by email, if you can
- Where the property is
If you are in Newington and need window mastic, call 0345 464 0079 or send us an email. Tell us what the problem is and where, and we will agree the price before any work begins.
Frames and glazing around Newington
Newington is close to the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. Both are hard on the mastic around window and door frames, which can dry out and crack sooner where a building faces the weather. Historic houses like Acrise Place (about 3.2 miles north) are a reminder that the area around Newington has older buildings as well as new. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic.
If you live in an older home near Church of St Nicholas, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Newington is about 2 miles north-east of Hythe, in Kent. If you need window mastic in Newington, it’s easy to get a quote: please ring 0345 464 0079 or send us an email. We’re based in Crawley and cover Kent, Newington included. Across Kent, we cover 922 places, and Newington is one of them. For nearby work, see our Chelmsford page, about 52 miles away.
Our applicators cover all of the CT18, CT20 and CT19 postcode area for window mastic and the streets around it. Local streets include School Lane, Newington Road and Boulevard D'erlanger, all of which we cover. We also cover Peene (1 mile north-east), Cheriton (1 mile east), Arpinge (1 mile north-east), Seabrook (1 mile south) and Etchinghill (2 miles north-west). Within a short drive, we also cover Ashford (11 miles west), Canterbury (13 miles north), Dover (9 miles east), Deal (15 miles north-east), Tower Hamlets (8 miles east) and Walmer (15 miles north-east).
Landmarks near Newington
We work in homes and buildings around The Britannia pub and the streets around them. For rail, the closest station is Folkestone West station, about 1.8 miles east of the centre. A little further out are Royal Victoria Hospital (2.5 miles east) and Elham Valley Countryside Centre And Railway Museum (0.5 miles north). Open spaces near Newington include Tolsford Hill.
Questions from Newington
Do you cover smaller places like Newington?
Yes, smaller places are covered as well as towns. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Does the coastal weather in Newington affect outside sealant?
Near the sea, outside joints face more wind, rain and salt than they would inland, so the choice of sealant and the preparation matter even more. Walls facing the sea are normally the first to need attention.
Can you seal the gap between the frame and the plaster indoors?
Yes. Draughts often come through the inside gap too, so it can be worth sealing both.
What information do you need?
Just the basics: where it is, what you’ve noticed and how we reach it. After that, simply ring 0345 464 0079 or email us.
Can I paint over the new sealant?
That depends on the product. Some hybrid sealants can be painted; silicone cannot. Mention any painting plans before we start.
Do the sealants smell?
Possibly a little. It fades as the sealant cures, and ventilation helps.
Should I try DIY first?
It depends on the job. High-level, external movement and fire-rated joints are professional jobs.
Do you have sealant for grey or black windows?
Yes, we choose a colour to suit the frame. Anthracite grey, black, brown and white cover most frames, with clear as an option.
When something else is needed
Sealant isn’t the answer to every problem, and we will tell you before any work starts. Sealant won’t put right:
- Penetrating damp from a failed cavity tray or render
- Worn gaskets, brush seals or a door that has dropped
- A frame that has rotted at the joint
If in doubt, phone 0345 464 0079 or drop us an email and we’ll say what we think.
Where we work in Newington
- uPVC windows
- Timber windows & doors
- Composite doors
- Aluminium frames
- Window sills
- Patio & French doors