Medway · England
Window & door mastic in Kingsnorth, Medway
Our applicators work in Kingsnorth on mastic around window and door frames, sills and patio doors. Old material cut out, joints cleaned and sealed neatly.
- Cracked or shrunken mastic around the frame
- Old mastic that has gone black or come away
- Cracked internal joints between frame and plaster
Window mastic in Kingsnorth, done properly
Behind a thin line of old mastic there’s sometimes a deep void. Filling it with sealant alone leaves a joint that can’t move properly, so deep gaps get backing rod first. The sealant then grips the two sides it should. We work on timber windows & doors, aluminium frames and uPVC windows, and the jobs we see most are damp patches on the reveal after heavy rain and cracked internal joints between frame and plaster.
In a village or hamlet like Kingsnorth, older cottages and farmhouses often have timber windows set in stone or brick. Older buildings like these don’t always suit modern silicone, and sometimes a traditional sand mastic is the better choice.
Big or small, you get the same one-year guarantee in Kingsnorth and across Medway.
- Place
- Kingsnorth (ME3)
- Wider area
- Medway
- Guarantee
- One year on every job
- Quote
- A clear quote up front
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Quotes for window mastic in Kingsnorth
You will get a clear quote before we start. It’s based on:
- The old material and how stubborn it is
- How easy the joints are to reach
- When we can work, for business premises
- The product the joint needs
There are no prices on our website, because each job is priced on what it involves. For a quick quote, please ring 0345 464 0079 or email us.
What we need to know
Before you ask for a quote, have a think about:
- The rough size of the job
- The address or postcode of the job
- What the problem is, such as mould, gaps, leaks or cracking
- The type of property
Need a quote? Please phone 0345 464 0079 or send us an email and tell us about the job. You will know what we plan to do, and what it will cost, before any work begins.
Common problems we fix in Kingsnorth
A lot of older mastic was never designed to stay flexible. Once it has hardened, the frame’s movement tears it from the wall, and a gap opens along one edge.
Any of these means the joints need attention:
- Sealant in the wrong colour for the frame
- Gaps between the frame and the inside reveal
- Cracked sealant at the sill ends
- Cracked or shrunken mastic around the frame
If you let a flat or house near Gillingham (Kent) station, cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets.
Before you book anyone
- How the colour is chosen
- How the surfaces are prepared before sealing
- How long to leave it before use
- What product goes in the joint
What we do, step by step
Once we are on site, we check the joints match what you told us. If anything is different, we explain it before carrying on. Most jobs then take anything from an hour or two to a full day, depending on how many frames there are. In a small place like Kingsnorth, access is normally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- First, we go round the frames with you and agree the list.
- We remove the old mastic and clean the frame edge and wall.
- Deep gaps get closed-cell backing rod to set the depth.
- The new sealant goes on in white, brown, anthracite grey, black or clear to suit.
- We tool each bead neatly and check every joint is closed.
Getting ready for the visit
- Let us know if you’ve seen damp or leaks
- Move anything stored near the joints
- Mention any tricky access
Ask for a quote
We quote each job on its own, so the first step is telling us about yours. Simply ring 0345 464 0079 or drop us an email and describe the job, and pictures are welcome.
Advice
Nearby places to Kingsnorth
Also in Kingsnorth
What happens if it’s left?
Draughts and leaks do not always mean new windows. If the frames and glass are in good order, resealing the joints is often all that is needed. If we find failed glass units or worn seals, we will tell you. Around Kingsnorth, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
Every job is a little different, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all play a part, and we’ll explain the quote if you ask.
Why book with us
- 12-month guarantee on every job
- Any old sealant cut out fully, not covered over
- White, clear, grey or another colour, product permitting
- 20+ years of sealant experience
Kingsnorth: your questions answered
Do you work for landlords with property near Gillingham (Kent) station?
Yes, rental work is part of what we do. You can ring 0345 464 0079 or send us an email with the address and a few details, and we’ll give you a fixed price before we start.
Does the coastal weather in Kingsnorth 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 usually the first to need attention.
Do you work for hotels and businesses?
Yes. We can plan bigger jobs in stages.
What does window mastic cost?
It depends on the job, so we quote each one individually. To get one, ring 0345 464 0079 or email us with a short description of the job.
What do you put in the joint?
The product depends on the job: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. We use products from Arbo and Everbuild.
Is it messy?
We keep the work tidy. We protect what’s around the joints, and we clear up when we’re done.
Is the new sealant paintable?
Most silicone can’t be painted. If you plan to paint, tell us first and we can use a paintable sealant where it suits the joint.
Can resealing stop a draught around my window?
In many cases. Air often gets in between the frame and the wall, and sealing the inside and outside joints closes that path.
Should I try it myself first?
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
Surface by surface
uPVC windows
The frame is cleaned with a product that won’t harm the plastic, then the new bead is laid against the frame and the wall.
Window sills
Every drop off the glass ends up on the sill, so the sill ends and the joint under the frame are vital. They’re cut out and resealed with exterior sealant.
How to look after the new joints
A little care helps the new joints last. Our advice:
- Clean frames with a soft cloth and soapy water
- Keep timber frames painted
- Air rooms to keep condensation down around windows
- Check the mastic once a year
Most silicone sealants will not take paint, so mention any painting plans before we start. We can use a paintable sealant where that matters.
Water trapped behind a failed joint can start rot in timber frames and sills. Rotten timber needs a joiner, not a sealant, so it pays to reseal before that happens.
Frames and glazing around Kingsnorth
Kingsnorth is within about 1 mile of the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. That’s hard on the mastic around window and door frames, especially on the side facing the sea. London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Managing a site like The Hundred of Hoo Academy? Then its window and door frames need their mastic kept sound, just like a home’s.
Kingsnorth is about 4 miles north of Gillingham, in Medway. Anywhere in ME3, our applicators can take on window mastic. Kingsnorth is one of 68 places in Medway where we work for window mastic. There’s also a page for Chelmsford, roughly 22 miles from Kingsnorth.
Jobs for window mastic in ME3 works the same way as everywhere else we cover. You’ll find streets such as Jetty Road and Jacob's Lane, and we cover them all. We also cover Tunbridge Hill (1 mile north), Sharnal Street (1 mile north-west), Fenn Street (1 mile north-west), Hoo St Werburgh (2 miles west) and High Halstow (2 miles north-west). Further out, we also cover Gillingham (4 miles south), Chatham (6 miles south-west), Rochester (5 miles south-west), Rainham (5 miles south), Strood (6 miles south-west) and Luton (5 miles south-west).
What’s near Kingsnorth
For rail, the closest station is Gillingham (Kent) station, roughly 3.6 miles south-west of the centre. A little further out are Medway Maritime Hospital (4.2 miles south-west) and Upnor Castle (3.5 miles south-west). The countryside around Kingsnorth includes Bishop Saltings.