Kent · England
Window & door mastic in Knave's Ash, Kent
Professional window mastic in and around Knave's Ash, with every bit of old sealant taken out first.
- Draughty joints inside around the window
- White mastic on grey or black frames
- Cracked or shrunken mastic around the frame
What happens on the day
Most of a good job is in the preparation, and we don’t rush it. Joints are cleaned back and dried before anything new goes in. All told, the work takes anything from an hour or two to a full day, depending on how many frames there are. In a small place like Knave's Ash, access is normally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We check each frame and agree which ones need doing.
- We remove the old mastic and clean the frame and the wall.
- Deep gaps are filled with backing rod to set the depth.
- A flexible, weatherproof sealant is applied in a colour to suit the frame.
- We clear up and check every joint is fully closed.
How to prepare
- Clear the area around the work
- Tell us about any water getting in
- Let us know about parking restrictions
Ask for a quote
To get a quote, phone 0345 464 0079 or drop us an email with the location and a short description of the problem. We will give you a clear price before any work starts.
Related advice
Window mastic in Knave's Ash, done properly
Every window and door frame has a gap around it, and mastic is what closes it. When it cracks, hardens or pulls away, draughts and rain get in. The old mastic is removed and the joint resealed with a flexible exterior sealant. If you have draughty joints inside around the window and white mastic on grey or black frames, we can put it right, on timber windows & doors, window sills and composite doors alike.
In a village or hamlet like Knave's Ash, older cottages and farmhouses often have timber windows set in stone or brick. Older buildings like these don’t always suit modern silicone, so the sealant has to be chosen to suit the building.
You are covered for a year from the day we finish. If there’s a problem with it, please phone 0345 464 0079 or drop us an email.
- Location
- Knave's Ash (CT3)
- Region
- Kent
- Cover
- 12 months on all our work
- Quote
- A clear price before work begins
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Knave's Ash homes and the weather
Knave's Ash 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. Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
If you live in an older home near Church of the Holy Cross, the joint between an old wall and a newer frame is generally the first place rain gets in. Letting a property close to Herne Bay station? Then sound mastic around windows and doors keeps out the draughts and damp that tenants notice first.
Knave's Ash is about 2 miles south of Herne Bay, in Kent. Our applicators cover window mastic for homeowners, landlords and businesses in Knave's Ash and the surrounding area, as part of our work across Kent. We cover 922 towns and villages across Kent, from the larger towns to small villages. Our Chelmsford page covers work nearby.
All of CT3 is within our area for window mastic, from the main roads to the quietest streets. Whether your property is on Hicks Forstal Road and Hoath Road or anywhere close by, our applicators can take on the job. If you’re just outside Knave's Ash, we cover Hoath (1 mile east), Maypole (1 mile north-east), Old Tree (1 mile north-east), Millbank (1 mile north-east) and Hicks Forstal (1 mile west). Larger places within reach include Canterbury (5 miles south-west), Margate (10 miles east), Dover (15 miles south-east), Ramsgate (11 miles east), Broadstairs (12 miles east) and Whitstable (5 miles west).
Near you in Knave's Ash
In Knave's Ash, that means homes and buildings near Curtis Wood and Spires Academy. For rail, the closest station is Herne Bay station, roughly 2.6 miles north-west. A little further out are St Martins Hospital (4.4 miles south-west). Not far away are West Blean and Thornden Woods.
Keeping the joints in good condition
Joint life depends on how it’s used and looked after. Here’s what we suggest:
- Walk round the house once a year and look at the joints
- Wash the frames with mild soapy water
- Keep paint off silicone joints
- Repaint timber before it’s bare
Timber frames need their paint kept up, since wood that gets wet swells and shrinks more. Paint up to the joint, not over the silicone.
Leaks usually show up in wet, windy weather, but sealant goes on best when frames and walls are dry. Dealing with it when you first notice a crack avoids chasing leaks through the wet months.
Why it’s worth doing now in Knave's Ash
Running fresh sealant over the old joint is tempting, but it won’t grip old, dirty sealant. It soon lifts and the leak carries on behind it. The old mastic has to come out. Where a wall is exposed, as many are in small places like Knave's Ash, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
The cost depends on how much there is to do, how much old material has to come out and how easy the joints are to reach. We give a clear quote before any work starts, so you know where you stand.
What you get with us
- Quality sealants from Arbo and Everbuild
- Approved under the ARBOMaster scheme
- Old sealant always removed completely
- 20+ years of sealant experience
See our cost guide or what customers say.
Should I try it myself first?
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and doesn’t move well, and the joint depth matters as much as the finish.
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is.
More services for Knave's Ash
Your questions about window mastic in Knave's Ash
Does the coastal weather in Knave's Ash affect outside sealant?
Coastal homes put outside sealant through more weather than inland ones, so preparation and the right sealant matter all the more. It’s worth checking the walls that face the sea first.
Do you work for landlords with property near Herne Bay station?
Yes. We work for landlords and agents as well as householders, and several properties can go on one quote. Just phone 0345 464 0079 or send us an email with the address and what needs doing, and we’ll give you a clear price.
Do you come to Knave's Ash?
Yes. From our base in Crawley, we cover South East England, London and all of Scotland, Knave's Ash included.
Is the new sealant paintable?
That depends on the product. Some hybrid sealants can be painted; silicone cannot. Tell us if you’re decorating and we’ll choose accordingly.
Is it worth trying it myself?
You can, for simple jobs. The key is preparation: remove all the old material and work on a clean, dry joint. If it doesn’t work out, we can redo it.
Can you match the sealant to my frames?
Yes, we choose a colour to suit the frame. Grey and black frames get grey or black sealant, and wood-effect frames generally suit brown.
Can resealing stop a draught around my window?
Yes, if the air is getting in around the frame. If it’s through the window’s own seals or a hinge, that’s a different fix, and we will say so.
Do you take out the old sealant first?
Always. Sealing over the old bead is the commonest cause of early failure, and it’s something we never do.
Common problems we fix in Knave's Ash
Sills take more water than any other part of a window, so the sill ends and the joint below the frame are common leak points. Failed sealant there lets rain into the wall or behind the frame.
If you can see any of these, it’s time to have the joints looked at:
- Mastic that is falling out in pieces
- Cracked internal joints between frame and plaster
- Gaps where the sill meets the wall
- Rain getting in at the frame or under the sill
If you look after a building such as Hoath Primary School, its window and door frames need their mastic kept sound, just like a home’s.
Questions to ask before you book
- What happens if they find a problem under the old sealant
- How the colour is chosen
- How the surfaces are prepared before sealing
- What guarantee comes with the work
Work for landlords, hotels and businesses
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance that we can handle for you.
Landlords and agents in Knave's Ash can book us as well as householders. Sealant work between tenants is a simple way to keep a property in good order before the next move-in.
What affects the quote in Knave's Ash
We do not publish a price list, because no two jobs are the same. The quote depends on:
- Whether the work is at height
- How much old sealant there is and how hard it is to remove
- The number and length of the joints
- Which sealant suits the joint
Combining jobs into one visit usually makes better use of the time than several visits, so tell us about everything that needs sealing. We will give you a clear price for the lot.
Helping us quote
There’s no need for technical detail. Just tell us:
- What’s wrong with the joints now
- Photos by email, if that’s easy
- Whether it has been sealed before
- The address or postcode of the job
For a quick quote, get us on the phone, or email us if that is easier. Describe what needs sealing and we’ll explain what’s involved and send you a clear quote.