Kent · England
Window Mastic in Marshborough
Problem with your window and door frames in Marshborough? We remove the old material, prepare the joints and seal them properly.
- Gaps left after new windows were fitted
- White mastic on grey or black frames
- Cracked or shrunken mastic around the frame
How we handle window mastic in Marshborough
Every window and door frame has a gap around it, and mastic is what closes it. 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’re dealing with mastic that has split away from the wall and draughts coming in around windows and doors, we can help, on patio & French doors, uPVC windows and aluminium frames alike.
In a village or hamlet like Marshborough, older cottages and farmhouses often have timber windows set in stone or brick. Older buildings like these do not always suit modern silicone, and sometimes a traditional sand mastic is the better choice.
Our work is backed for twelve months, in Marshborough and everywhere else we cover.
- Location
- Marshborough (CT13)
- Region
- Kent
- Cover
- One year on every job
- Quotes
- A clear price before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Work for landlords, hotels and businesses
A neglected joint can let water reach the structure, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance that we can handle for you.
From a single let to a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
How we quote for window mastic
The price is agreed before any work begins. It’s based on:
- The amount of work
- Access and height
- Whether there’s mould to deal with
- How many rooms, windows or areas are involved
Doing several joints on one visit is usually more efficient than separate visits, so tell us about everything that needs sealing. We will send you a clear quote for the lot.
What to tell us for a quote
Photos help, but a description is a good start. Try to tell us:
- The rough size of the job
- What the problem is, such as mould, gaps, leaks or cracking
- Any previous sealing or DIY work
- If it’s domestic, commercial or a hotel
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is.
Can I do it myself?
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
If you’ve already had a go yourself, that is fine. We remove it and do the joint properly, so just mention it when you contact us.
FAQs for Marshborough
I let a flat near Sandwich station. Can you help?
Yes, rental work is part of what we do. You can call 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.
Do you cover Marshborough for window mastic?
Yes. We work across London and the South East, and Marshborough is part of that. Just phone 0345 464 0079 or email us with a few details of the job, and we will send you a clear quote.
How long will my window job take?
The work takes anything from an hour or two to a full day, depending on how many frames there are. Access and how stubborn the old mastic is affect the time most.
Can you match the sealant to my frames?
Yes. White, brown, anthracite grey, black and clear sealants are all available.
Can you seal the gap between the frame and the plaster indoors?
Yes. Draughts often come through the inside gap too, so it can be worth sealing both.
Do you do commercial work?
Yes. Commercial and hotel work is a large part of what we do. Working times can be discussed when we quote.
Will new mastic stop draughts?
It will if the frame joint is the problem. We find where the air is coming from before we reseal.
Do the sealants smell?
There can be a smell while the sealant cures, but it fades. Ventilation helps.
How to look after the new joints
To keep the joints looking good and working properly:
- Avoid harsh chemicals near the mastic
- Repaint timber before it’s bare
- Look round the frames every year or so
- Do not paint over the silicone
Wipe the frames with soapy water when you clean the windows, and keep solvents and harsh chemicals off the joint.
On timber windows, water behind the joint can lead to rot. Rotten timber needs a joiner, not a sealant, so early resealing is worth it.
Signs you need window mastic in Marshborough
Timber windows bring their own problems. Old mastic gets painted over and cracks under the paint, and timber moves with moisture as well as temperature.
These are the problems we’re asked about most:
- Hard, cracked sealant around windows
- Draughty joints inside around the window
- Cold air getting in at the frame edge
- Rushed sealant from a window installation
For site and facilities teams at buildings such as Sandwich Technology School, its window and door frames need their mastic kept sound, just like a home’s.
Before you book anyone
- Whether all the old sealant comes out first
- What happens if they find a problem under the old sealant
- Which colour the sealant will be
- How the surfaces are prepared before sealing
Towns and villages near Marshborough
Other services in Marshborough
How the job changes by surface
Window sills
Sills catch the water running down the glass, so the sill ends and the joint under the frame are vital. They’re cut out and resealed with exterior sealant.
uPVC windows
uPVC expands and contracts noticeably with temperature, so the joint needs a low-modulus sealant that stays flexible. White is the usual colour, with brown, anthracite grey and black for coloured frames.
What happens on the day
All our tools and materials come with us in the van. Once we have agreed what’s being done, we protect the area and start. Most jobs take a few hours for a handful of frames, longer for a whole house. In a small place like Marshborough, access is generally 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.
- Deep gaps get closed-cell backing rod to set the depth.
- 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
- For indoor joints, keep the area dry beforehand if you can
- Mention any leaks or damp you’ve noticed
- Mention if the joints have been sealed before
How to get a quote
It all starts with a short chat. Describe the problem, the location and the size of the job, and we’ll talk you through what we’d do. Whenever you are ready, call 0345 464 0079 or email us.
Related advice
Frames and glazing around Marshborough
Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. Historic houses like Goodnestone Park (about 3.7 miles south-west) are a reminder that the area around Marshborough has older buildings as well as new. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window.
Rented homes near Sandwich 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. If you live in an older home near Church of St Mary the Virgin, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Marshborough is about 5 miles north-west of Deal, in Kent. Anywhere in CT13, we cover window mastic for homes and businesses. 922 places in Kent are on our list. We also work in Chelmsford, around 48 miles away.
Work in CT13 works the same way as everywhere else we cover. We also cover the places around Marshborough: Woodnesborough (1 mile south-east), East Street (1 mile north), Statenborough (1 mile south-east), Felderland (2 miles south-east) and Sandwich (2 miles east). Larger places within reach include Canterbury (10 miles west), Margate (8 miles north-east), Dover (9 miles south), Folkestone (14 miles south-west), Ramsgate (7 miles north-east) and Broadstairs (8 miles north-east).
Around Marshborough
Locally, jobs take us to homes and businesses close to Ham Fen. The closest station to Marshborough is Sandwich station, about 1.7 miles east of the centre. Well-known places in the area include White Mill (1.3 miles north-east) and Sandown Castle (4.8 miles south-east). Open spaces near Marshborough include Monk's Wall nature reserve.