Kent · England
Window Mastic in Dunk's Green
Window mastic for Dunk's Green and the surrounding area: careful preparation, the right product and tidy work. Call for a quick quote.
- Sealant in the wrong colour for the frame
- Cracked or shrunken mastic around the frame
- Old mastic that has gone black or come away
Window mastic in Dunk's Green, done properly
There are two joints on most windows. Outside, the mastic keeps rain out; the internal joint closes the gap to the plaster and stops draughts. We seal one or both, depending on what’s needed. We work on aluminium frames, patio & French doors and timber windows & doors, and the jobs we see most are draughty joints inside around the window and mastic that’s falling out in pieces.
Around Dunk's Green, many homes face open ground, so their windows and doors take the full weather. Exposed frames and sills lose their mastic sooner than sheltered ones.
All our work comes with our one-year guarantee.
- Location
- Dunk's Green (TN11)
- Region
- Kent
- Guarantee
- A year, on every job
- Quote
- A clear quote up front
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Work for landlords, hotels and businesses
For anyone letting property in or around Dunk's Green, jobs at different addresses can be quoted together. Send us the addresses and the work at each, and pictures by email help.
Failed sealant is one of the commonest items on a check-out report. We can quote for more than one property at once.
Other services in Dunk's Green
What window mastic looks like in Dunk's Green
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. With historic houses such as Old Soar Manor (about 0.9 miles north-east) nearby, there’s older building stock in the area around Dunk's Green as well as newer homes. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window.
If you look after a building such as Plaxtol Primary School, larger buildings have plenty of frames, and the mastic around each one ages. Letting a property close to Borough Green & Wrotham station? Then cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets.
Dunk's Green is about 4 miles north of Tonbridge, in Kent. For window mastic in and around Dunk's Green, it’s easy to get a quote: please phone 0345 464 0079 or send us an email. We’re based in Crawley and cover Kent, Dunk's Green included. Our area takes in 922 places across Kent, from the larger towns to small villages. For nearby work, see our London page.
Every address in TN11 is within our area for window mastic, from the main roads to the quietest streets. Neighbouring places we cover for window mastic include Plaxtol (1 mile north), Roughway (1 mile east), Claygate Cross (2 miles north), Crouch (2 miles north) and Pittswood (2 miles south). Within a short drive, we also cover Maidstone (10 miles east), Dartford (14 miles north), Sevenoaks (6 miles west), Royal Tunbridge Wells (8 miles south), Gravesend (13 miles north) and Tonbridge (4 miles south).
Landmarks near Dunk's Green
In Dunk's Green, that means homes and buildings near Hadlow Rural Community School, The Kentish Rifleman Public House and Ivy Hatch Nature Reserve, among other places. Dunk's Green’s nearest station is Borough Green & Wrotham station, roughly 2.8 miles north. A little further out are Tonbridge Cottage Hospital (5.3 miles south) and Ightham Court (3.1 miles north). Not far away are Barden Lake.
What affects the cost of window mastic
You’ll get a clear quote before we start. It’s based on:
- The size of the job
- Whether the work is at height
- Mould in or behind the old joints
- Whether old sealant or filler has to be cut out
The cost depends on the size of the job, how much old material has to come out and access to the work. We give a clear quote before any work starts.
Helping us quote
There’s no need for technical detail. It helps if you can tell us:
- Photos by email, if that is easy
- Where the job is, and your postcode
- Any previous sealing or DIY work
- What the problem is, such as mould, gaps, leaks or cracking
To get a quote, phone 0345 464 0079 or email us and tell us where the job is and what the problem looks like. You’ll have a clear quote before work begins.
DIY sealant or a professional job?
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and does not move well, and getting the depth right matters as much as the look.
The biggest DIY mistake is sealing over old sealant. Silicone does not stick to old silicone, so it lifts and traps water and mould underneath. All the old material has to come out first.
Questions from Dunk's Green
Can you help a landlord with a rental near Borough Green & Wrotham station?
Yes, we work for landlords and letting agents. Just phone 0345 464 0079 or drop us an email and tell us about the property, and we’ll give you a clear quote.
Can you do window mastic in Dunk's Green?
Yes. We work across London and the South East, and Dunk's Green is part of that. You can phone 0345 464 0079 or send us an email and tell us what needs doing, and we’ll give you a clear quote.
Can new window sealant be painted?
Not if it’s silicone. Tell us your decorating plans and we will pick a sealant to suit.
How much does window mastic cost in Dunk's Green?
The cost depends on the size of the job, access and how much old sealant has to come out. Ask us for a quote and we’ll talk you through it.
Can you quote for more than one area?
Yes. More than one area can go on one quote.
Do you have insurance?
Yes. We’re fully insured, and we can confirm the details when we quote.
Is there any odour?
That depends on the sealant. Some products have a noticeable smell, others very little.
Can you do the inside joint as well?
Yes. Draughts often come through the inside gap too, so sealing both is often worthwhile.
Common problems we fix in Dunk's Green
Plenty of failed mastic was poorly applied in the first place. Mastic laid onto dusty, damp or crumbling surfaces didn’t grip properly, and it lets go sooner than it should.
Most people get in touch after spotting something like this:
- Old mastic that has gone black or come away
- Whistling draughts around closed windows
- Cracked internal joints between frame and plaster
- Cracked sealant at the sill ends
For an older house near a landmark such as Plaxtol Church, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
What your quote should include
- What the quote includes, VAT included or not
- Is the old sealant removed completely?
- When the joint can take water or movement
- What happens if they find a problem under the old sealant
Why act early in Dunk's Green
Once mastic fails, rain can get between the frame and the wall. Over time that can mean damp patches, damaged plaster and rotting timber. A reseal is a much smaller job. Around Dunk's Green, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
Doing several joints on one visit generally makes better use of the time than several visits. You’ll get one clear quote for the whole job.
Why choose Mr Mastic in Dunk's Green
- Colour picked to suit the job
- White, clear, grey or coloured to suit, where the product allows
- Domestic, commercial and hotel work
- Full insurance on every job
Read what affects the cost or customer reviews.
What we cannot put right
New sealant can’t fix everything, and we will tell you before any work starts. Sealant will not put right:
- Worn gaskets, brush seals or a door that has dropped
- Broken hinges, locks or handles
- Damp problems in the wall away from the window
If in doubt, call 0345 464 0079 or send us an email and we’ll say what we think.
Where we work in Dunk's Green
- Composite doors
- uPVC windows
- Patio & French doors
- Aluminium frames
- Window sills
- Timber windows & doors
What we do, step by step
There’s no need to move everything out before we come, just the space around the work. We protect the rest, and the work takes a morning for a couple of windows and a door in most cases. In a small place like Dunk's Green, access is normally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- We check how each frame can be reached safely.
- All the failed sealant is cut away.
- Frame and wall are cleaned and must be dry before sealing.
- Deep voids are backed, then the sealant is gunned in.
- The joint is shaped to shed water and the area tidied.
Before we arrive
- Clear items away from the joints we are working on
- Mention if the joints have been sealed before
- Tell us about any water getting in
Getting a quote
For window mastic in Dunk's Green, call 0345 464 0079 or drop us an email. Tell us what the problem is and where, and we will agree the price before any work begins.