Kent · England
Window & door mastic in Berwick, Kent
Window and door frames in Berwick need attention? We cut out the old, prepare the joints and apply the right sealant, and the work is guaranteed for a year.
- Cracked internal joints between frame and plaster
- Mastic that is falling out in pieces
- Gaps where the sill meets the wall
Window mastic in Berwick
Homes in Berwick have every kind of window: uPVC, aluminium, timber and composite, along with patio doors, French doors and sills. Each gets a sealant chosen for the frame and the wall it meets. We work on window sills, composite doors and uPVC windows, and common reasons people get in touch are damp patches on the reveal after heavy rain and whistling draughts around closed windows.
Somewhere as small as Berwick, older homes often have timber frames set in stone or brickwork. Not every older frame suits a modern silicone bead, so the sealant has to be chosen to suit the building.
All our work comes with a 12-month guarantee.
- Where
- Berwick (CT21)
- Wider area
- Kent
- Cover
- One year on every job
- Quotes
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Aftercare tips
Good habits help new joints last longer. A few tips:
- Use gentle cleaners on frames and sealant
- Don’t paint over the silicone
- Look round the frames every year or so
- Repaint timber before it’s bare
Wipe the frames with soapy water when you clean the windows, and avoid solvent cleaners on the sealant.
A failed joint lets water into the wall a little at a time. Often the first sign is a damp patch inside or flaking paint on the reveal. Catching it early keeps the fix to a reseal.
Nearby places to Berwick
More services for Berwick
Why act early in Berwick
Failed mastic is not a reason to replace sound windows. Where the frames are sound, new mastic normally deals with draughts and leaks at the edges. If we find failed glass units or worn seals, we will tell you. Older cottages and farmhouses around Berwick can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
What you pay reflects the work, not a rough estimate. That’s why we ask about the job first.
Why Berwick customers choose us
- Anti-fungal sanitary silicone in wet areas
- Any old sealant cut out fully, not covered over
- 20+ years of sealant experience
- A choice of colours where the product allows
What the job involves on each surface
Timber windows & doors
Where timber has rotted at the joint, it needs repairing first. We’ll point out any rot we find, as that is a job for a joiner.
Aluminium frames
Bi-fold and sliding aluminium doors have long frame joints, and the bottom joint sees the most water. We prepare and reseal every joint, backing the deep ones.
Can I do it myself?
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.
If you’ve already had a go yourself, that’s fine. We remove it and do the joint properly.
What happens on the day
At the end, we look at the finished work together. The visit itself normally takes most of a day for a typical house, less for a few frames, depending on the amount of work. In a small place like Berwick, access is normally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- First we look at every frame and agree the list.
- The old mastic is cut out and the surfaces cleaned back.
- Where gaps are deep, backing rod goes in first.
- New exterior sealant goes on in a matching colour and is tooled smooth.
- Finally we tidy up and check each joint.
How to prepare
- Mention any parking rules near the property
- Mention any sign-in or site rules at work premises
- Try not to wet indoor joints just before the visit
Ask for a quote
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is, and we’ll explain how we’d tackle it. Whenever you are ready, phone 0345 464 0079 or email us.
Related advice
Quotes for window mastic in Berwick
Every job gets its own quote. This is what makes a difference:
- How much old sealant there is and how hard it is to remove
- Working hours on commercial sites
- Mould in or behind the old joints
- The type of sealant required
No two jobs are quite the same, so we quote each one individually. The number of joints, how easy they are to reach and the sealant needed all make a difference.
What to tell us for a quote
When you contact us, it’s useful to know:
- How many joints, rooms or windows are involved
- What’s wrong with the joints now
- Whether it’s a home or a business
- How we’d reach the joints
Every job is quoted individually, so the first step is telling us about yours. Simply phone 0345 464 0079 or email us and describe the job, and pictures are welcome.
FAQs for Berwick
Do you cover smaller places like Berwick?
Yes, we do. Our work covers London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
Can you help a landlord with a rental near Westenhanger station?
Yes, landlords and agents are among the people we work for. Just phone 0345 464 0079 or send us an email with the address and what needs doing, and we will give you a clear quote.
How long does it take to reseal the windows on a house?
A few frames take a few hours, while a whole house takes longer. You’ll get a timescale with the quote.
Can you do the inside joint as well?
Yes. Draughts often come through the inside gap too, so sealing both is often worthwhile.
Is it OK to seal over old sealant?
No, it will not last. It can look neat for a few weeks, but the new layer lifts away from the old one. The old sealant has to come out completely.
Will there be a smell?
Possibly a little. Any smell clears as the sealant cures.
Can I paint over the new sealant?
Not generally, if it’s silicone. We choose the product with your decorating in mind, so mention it when you book.
Do you do commercial work?
Yes. Hotels, offices and other businesses use us, and we are fully insured.
When it is not the sealant
Some problems need a builder, plumber or other trade rather than us:
- Worn gaskets, brush seals or a door that has dropped
- Damp coming through the wall itself rather than the frame joint
- Rotten timber, which needs a joiner first
If you’re not sure, just call 0345 464 0079 or drop us an email and we’ll give you a straight answer.
What we seal
- Composite doors
- Aluminium frames
- Timber windows & doors
- uPVC windows
- Window sills
- Patio & French doors
Windows and doors in Berwick
Berwick is close to the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. That is hard on the mastic around window and door frames, especially on the side facing the sea. With historic houses such as Westenhanger Castle (about 0.9 miles north) nearby, there’s older building stock in the area around Berwick as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window.
Rented homes near Westenhanger station change hands often, and cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets. In the older streets around Church of St Stephen, frames set in older brick or stone need a sealant that suits the wall as well as the frame. If you look after a building such as Lympne Church of England Primary School, the mastic around its windows and doors needs looking after like any other building’s.
Berwick is about 2 miles west of Hythe, in Kent. We carry out window mastic for homes and businesses in Berwick, as part of our work across Kent. Across Kent, we cover 922 places, Berwick among them. You can also see our page for Chelmsford, about 51 miles away.
We work across the CT21 postcode area for window mastic. Window mastic is available to properties on Stone Street, Folks Wood Way and Honeywood Close and the roads around them. Other places close to Berwick include Lympne (1 mile south-west), Newingreen (1 mile north-east), Westenhanger (1 mile north), West Hythe (1 mile south) and Pedlinge (1 mile east). Within a short drive, we also cover Ashford (8 miles north-west), Canterbury (14 miles north), Dover (12 miles east), Folkestone (6 miles east), Tower Hamlets (12 miles east) and Hawkinge (6 miles east).
Near you in Berwick
In Berwick, that means homes and buildings near Brockhill Park Performing Arts College, Sandling Park and The Royal Oak Public House and the streets around them. Berwick’s nearest station is Westenhanger station, roughly 1 mile north. Well-known places in the area include Lympne Castle (0.7 miles south-west) and Hythe Museum (2.4 miles east). Open spaces near Berwick include Tolsford Hill.