Kent · England
Window & door mastic in Bonnington, Kent
We cover Bonnington for mastic around window and door frames, sills and patio doors. Old material cut out, joints cleaned and sealed neatly.
- Sealant in the wrong colour for the frame
- Cracked or shrunken mastic around the frame
- Mastic that is falling out in pieces
What affects the quote in Bonnington
We do not publish a price list, because no two jobs are the same. The quote depends on:
- How many rooms, windows or areas are involved
- Working hours on commercial sites
- Any mould that needs treating
- Whether old sealant or filler has to be cut out
The cost reflects the work involved, not a rough estimate. That is why we ask about the job first and agree the price before starting.
Asking for a quote
There’s no need for technical detail. Just tell us:
- How we’d reach the joints
- The rough size of the job
- The address or postcode of the job
- Pictures of the joints, sent by email
Want a quote for window mastic? Please ring 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.
How we handle window mastic in Bonnington
The mastic around a window or door seals the gap between the frame and the wall. Once that seal fails, wind and rain find the gap. The old mastic is removed and the joint resealed with a flexible exterior sealant. If you have cracked internal joints between frame and plaster and draughts coming in around windows and doors, we can help, on composite doors, aluminium frames and uPVC windows alike.
Mastic can only go onto a dry, clean joint, so window work in Bonnington is booked around the forecast. Tell us about access to every side of the house, including upper-floor windows.
There’s a 12-month guarantee on every job.
- Place
- Bonnington (TN25)
- Wider area
- Kent
- Cover
- 12 months on all our work
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Frames and glazing around Bonnington
Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. Historic houses like Westenhanger Castle (about 4.4 miles east) are a reminder that the area around Bonnington has older buildings as well as new. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window.
For site and facilities teams at buildings such as Aldington Primary School, larger buildings have plenty of frames, and the mastic around each one ages. Letting a property close to Ham Street station? Then renewing tired window mastic between tenants heads off draught and damp complaints.
Bonnington is about 5 miles south-east of Ashford, in Kent. Homes, rented property, offices and hotels in Bonnington can book us for window mastic, old or new, large or small. The work is guaranteed for a year. Bonnington is one of 922 places in Kent where we work for window mastic. We also work in Crawley, about 49 miles from Bonnington.
Postcode districts we cover here for window mastic: TN25. Whether your property is on Cherry Orchard Lane and Bourne Road or anywhere close by, we can help. We also cover the places around Bonnington: Aldington (1 mile north-east), Clap Hill (1 mile north-east), Aldington Frith (1 mile north-west), Stonestreet Green (1 mile north-east) and Postling Green (1 mile east). Larger places within reach include Ashford (5 miles north-west), Canterbury (15 miles north-east), Folkestone (10 miles east), Hythe (7 miles east), Hawkinge (10 miles east) and Wincheap (14 miles north-east).
Local landmarks in Bonnington
Around Bonnington, our work takes us to homes and buildings near Poulton Wood and Walnut Tree Inn and the streets around them. The nearest railway station is Ham Street station, about 3.6 miles west. Well-known places in the area include William Harvey Hospital (3.8 miles north) and Lympne Castle (4.2 miles east). Green spaces nearby include Hatch Park.
How the visit works
All our tools and materials come with us in the van. After a quick look at the joints together, we protect the area and start. It normally takes a morning for a couple of windows and a door. In a small place like Bonnington, access is usually the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- First, we go round the frames with you and agree the list.
- The old mastic is cut out and scraped back to clean surfaces.
- Where the gap is deep, backing rod goes in first.
- A flexible exterior sealant is applied in a colour to suit the frame.
- Every joint is tooled smooth and checked before we leave.
Before we arrive
- Mention any leaks or damp you’ve noticed
- Let us know about earlier repairs to the joints
- Let us know about stairs, lifts or work at height
Getting a quote
We quote each job on its own, so the first step is telling us about yours. Just ring 0345 464 0079 or send us an email with the details and send pictures if you have them.
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Aftercare tips
Joint life depends on how it’s used and looked after. We suggest:
- Ventilate rooms so frames do not stay wet inside
- Paint up to the joint, not over it
- Avoid blasting the frames with a pressure washer
- Check the mastic once a year
Silicone cannot usually be painted, so mention any painting plans before any work starts. We can use a paintable sealant where that matters.
A failed joint lets water into the wall a little at a time. You might not see it until plaster blows or a damp patch appears inside. Early resealing stops it reaching that point.
What happens if it’s left?
Getting a straight, even bead on an outside frame takes practice, especially on upper floors. We cut out properly, back deep gaps and tool every joint neatly, in a sealant suited to the wall. Around Bonnington, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
A few things move the cost up or down: the old material and how easily it comes out, any mould to treat, and whether we need extra access for height. We take all of that into account in your quote.
Why book with us
- Tidy, careful work
- We agree the colour with you first
- Every job guaranteed for a year
- Full insurance on every job
Towns and villages near Bonnington
Also in Bonnington
What we can’t put right
Some problems need a builder, plumber or other trade rather than us:
- Broken hinges, locks or handles
- Misting between the panes of a double-glazed unit (that needs a new unit)
- A door that needs adjusting, rehanging or new seals
Not sure which it is? You can ring 0345 464 0079 or email us and we will tell you honestly before you book.
Joints and surfaces we work on
- Timber windows & doors
- uPVC windows
- Patio & French doors
- Window sills
- Aluminium frames
- Composite doors
Common problems we fix in Bonnington
Frames are never completely still. A plastic or aluminium frame lengthens in sunshine and shortens as it cools, while the brick or render around it hardly moves. If the sealant can’t stretch, it splits.
People normally contact us after spotting something like this:
- Leaking joints at the ends of sills
- White mastic on grey or black frames
- Gaps between the frame and the inside reveal
- Rushed sealant from a window installation
Homes close to Church of St Rumwold include some older properties, and replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Comparing quotes
- What preparation is included
- What happens if they find a problem under the old sealant
- Whether all the old sealant comes out first
- What the quote includes, VAT included or not
Questions from Bonnington
I let a flat near Ham Street station. Can you help?
Yes, rental work is part of what we do. Just call 0345 464 0079 or email us and tell us about the property, and we will give you a clear price.
Do you cover smaller places like Bonnington?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Do I have to be there?
For indoor joints, yes, someone needs to let us in. After that, you can carry on with your day.
What sealant do you use?
Each joint gets the product that suits it. Where it moves, gets wet or faces the weather makes a difference, and we’ll tell you what we are using.
Will there be a smell?
It depends on the product. Some products have a noticeable smell, others very little, and any smell fades as they cure.
Is it OK to seal over old sealant?
No, and we never do. It may look fine at first, but the new bead soon lifts. Removing the old sealant completely is the only lasting way.
Are you fully insured?
Yes, we are fully insured for domestic and commercial work.
How long does it take to reseal the windows on a house?
Allow a few hours for a few frames, or a day or more for a whole house. Access and how stubborn the old mastic is affect the time most.
DIY versus a professional finish
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, and the work is guaranteed for a year.