Oxfordshire · England
Window Mastic in Bunkers Hill
Professional window mastic in and around Bunkers Hill, with every bit of old sealant taken out first and a one-year guarantee.
- Water coming in at the bottom corners of a door
- Cracked or shrunken mastic around the frame
- Cold air getting in at the frame edge
Window mastic for homes and businesses in Bunkers Hill
The new joint does not have to be white. We can seal in white, brown, anthracite grey, black or clear, so the bead blends with the window rather than framing it. We work on window sills, patio & French doors and timber windows & doors, and people most often call us about cracked sealant at the sill ends and mastic that’s falling out in pieces.
In a village or hamlet like Bunkers Hill, older cottages and farmhouses often have timber windows set in stone or brick. Older buildings like these do not always suit modern silicone, so the sealant has to be chosen to suit the building.
The work is guaranteed for twelve months. If there’s a problem with our work within the year, let us know and we’ll sort it.
- Place
- Bunkers Hill (OX5)
- Wider area
- Oxfordshire
- Guarantee
- A year, on every job
- Quote
- A clear quote up front
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
What affects the cost of window mastic
Your quote is based on your job. We take into account:
- The number and length of the joints
- Any working-time requirements on site
- How much old sealant there is and how hard it is to remove
- Which sealant suits the joint
Some things make a job bigger or smaller: the old material and how easily it comes out, whether mould needs treating, and whether we need extra access for height. We take all of that into account in your quote.
What we need to know
When you call or email, it’s useful to know:
- If it’s domestic, commercial or a hotel
- A few pictures by email, if you can
- Any previous sealing or DIY work
- The rough size of the job
Getting a quote is simple: tell us what needs doing and where and its rough size. Photos by email help us understand the job.
Frames and glazing around Bunkers Hill
With historic houses such as Blenheim Palace (about 2.3 miles south-west) nearby, there’s older building stock in the area around Bunkers Hill as well as newer homes. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic. 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.
For an older house near a landmark such as Church of Holy Cross, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. Letting a property close to Tackley station? Then cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets.
Bunkers Hill is about 7 miles south-west of Bicester, in Oxfordshire. For window mastic in and around Bunkers Hill, please ring 0345 464 0079 or drop us an email for a quick quote. We are based in Crawley and cover Oxfordshire, Bunkers Hill included. 443 places in Oxfordshire are on our list, large and small. We also work in Oxford, about 8 miles from Bunkers Hill.
We work across OX5 for window mastic and the streets around it. If you need window mastic at a property on Field View Lane and Bunkers Hill or a nearby road, our applicators can take on the job. Other places close to Bunkers Hill include Shipton-on-Cherwell (1 mile south-east), Thrupp (1 mile south), Woodstock (2 miles south-west), Tackley (2 miles north) and Begbroke (2 miles south). We also work in nearby towns such as Oxford (8 miles south-east), Banbury (14 miles north), Bicester (7 miles north-east), Abingdon-on-Thames (13 miles south), Witney (9 miles south-west) and Carterton (13 miles south-west).
Local landmarks in Bunkers Hill
We work in homes and buildings around Rock Of Gibraltar Public House, among other places. Bunkers Hill’s nearest station is Tackley station, roughly 1.8 miles north-east. A little further out are Soldiers of Oxfordshire Museum (2 miles west).
Keeping the joints in good condition
Once the sealant has cured, a few habits help it last:
- Wash the frames with mild soapy water
- Keep drainage slots and sill grooves clear
- Don’t paint over the silicone
- Keep timber frames painted
Most silicone sealants will not take paint, so if you’re planning to paint the frames or walls, tell us beforehand. There are paintable sealants for joints that need it.
Signs to watch for: cracks in the mastic, gaps you can see light through, damp on the reveal or mould around the inside of the frame. If you notice one, it’s time to get the joint looked at.
What we do, step by step
The work is kept neat and contained to the joints we’re treating. Expect the work to take a few hours for a handful of frames, longer for a whole house. In a small place like Bunkers Hill, access is generally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- 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.
- The new sealant goes on in white, brown, anthracite grey, black or clear to suit.
- Every joint is tooled smooth and checked before we leave.
Preparing for the visit
- Tell us about any water getting in
- Tell us about access, such as stairs, a lift or high-level joints
- Clear the area around the work
Getting a quote
To get a quote, call 0345 464 0079 or email us with the location and a short description of the problem. We will give you a clear quote before any work starts.
Advice
Questions from Bunkers Hill
Will you come out to Bunkers Hill?
Yes, we do. Our work covers London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Do you work for landlords with property near Tackley station?
Yes, we work for landlords and letting agents. Just ring 0345 464 0079 or email us and tell us about the property, and we’ll send you a clear quote.
Is it worth trying it myself?
Some simple jobs can be done by a careful DIYer. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
Do you take out the old sealant first?
Yes, every time. New sealant won’t bond properly to old, so the joint is cleaned back first.
What does window mastic cost?
Every job is different, so each one gets its own quote. To get one, ring 0345 464 0079 or drop us an email and let us know what needs doing and where.
What do you put in the joint?
It depends on the joint: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. We use products from Arbo and Everbuild.
Can you match the sealant to my frames?
Yes, in most cases. Tell us the frame colour when you get in touch and we will use the nearest match.
Can new sealant go over the old?
No, because it fails. We remove every bit of old sealant first, so the new joint bonds to clean surfaces.
Other services in Bunkers Hill
What happens if it’s left?
The work is quick compared with the damage it prevents: it takes anything from an hour or two to a full day, depending on how many frames there are. Wait for damp to appear and there may be plaster and decorating to sort out too. Where a wall is exposed, as many are in small places like Bunkers Hill, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed, plus any working-time requirements on site. Call for a quick quote and we will explain what it covers.
Why us?
- More than 20 years in sealant work
- 12-month guarantee on every job
- A choice of colours where the product allows
- Old sealant always removed completely
Take a look at what affects the cost or our reviews.
What sealant work can’t fix
We will always be straight with you, so here’s what new sealant won’t do:
- A frame that has rotted at the joint
- Misting between the panes of a double-glazed unit (that needs a new unit)
- Broken hinges, locks or handles
If you are not sure, just ring 0345 464 0079 or email us and we will give you a straight answer before you book.
Where we work in Bunkers Hill
- Composite doors
- Window sills
- Patio & French doors
- uPVC windows
- Timber windows & doors
- Aluminium frames
Common problems we fix in Bunkers Hill
Frames are never completely still. Sun on a frame makes it expand, and it contracts again overnight, while the masonry beside it stays put. If the sealant can’t stretch, it splits.
The problems people normally mention when they call are:
- Whistling draughts around closed windows
- Rain getting in at the frame or under the sill
- Black, perished sealant on frames
- Draughty joints inside around the window
Managing a site like Marlborough School? Then its window and door frames need their mastic kept sound, just like a home’s.
Comparing quotes
- How long to leave it before use
- What happens if the job turns out different
- Whether the sealant suits the joint
- The length of the guarantee
DIY versus a professional finish
If you do try it yourself, take your time over the preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it doesn’t work out, we can still put it right.
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.