Oxfordshire · England
Sand Mastic in Great Coxwell
Problem with your window and door surrounds in Great Coxwell? We remove the old material, prepare the joints and seal them properly.
- Weathered mastic on the most exposed windows
- Wind and rain getting in round a sash window
- Open joints round the window box
Sand mastic for homes and businesses in Great Coxwell
Our applicators renew the sand mastic around sash and case windows and doors in stone and brick. The old mastic is raked out, the joint is prepared and new mastic is shaped by hand. If you are dealing with mastic round period door frames that has failed and old sand mastic that has cracked, crumbled or fallen out, we can put it right, whatever the surface.
Outdoor sealant needs dry, clean surfaces, so work on frames around Great Coxwell is planned for dry weather. Tell us about access to every side of the house, including upper-floor windows.
Whatever the size of the job, you get the same one-year guarantee in Great Coxwell and across Oxfordshire.
- Place
- Great Coxwell (SN7)
- Region
- Oxfordshire
- Cover
- 12 months on all our work
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Great Coxwell: your questions answered
What guarantee comes with sand mastic in Great Coxwell?
Every job comes with our 12-month guarantee, wherever it is. We’re also fully insured and ARBOMaster approved.
Is Great Coxwell in your area for sand mastic?
Yes. Our work covers London and the South East, and Great Coxwell is part of that. You can call 0345 464 0079 or email us and let us know what needs doing, and we will give you a clear quote.
Do I have to be there?
That depends on where the joints are. For work indoors, someone needs to let us in, and for outside work we’ll agree access with you when we book.
Do you have insurance?
Yes. We’re fully insured, with over 20 years’ experience in sealant work.
Can I choose the sealant colour?
We help you choose a colour that suits, from white and clear to greys and other shades. The product needed can limit the range.
Is consent needed for window work on a listed home?
Yes, it’s worth checking. Your local planning authority can say if consent is needed for listed or conservation-area properties.
What is sand mastic?
It’s the traditional filler for the joint round timber windows and doors. It combines sand with a linseed-oil-based binder.
What do you need from me for a quote?
Tell us what needs doing and where, plus photos if you have them. We’ll ask anything else we need to know.
What happens on the day
Most of a good job is in the preparation, so that is where we spend the time. Joints are cleaned back and dried before anything new goes in. All told, the work takes anything from a few hours to a full day, depending on how many windows. For a village or hamlet like Great Coxwell, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- We check each window surround and the condition of the joint.
- The joint is raked out and cleaned.
- We fill deep gaps so the new mastic is not too thick.
- We point the joint with sand mastic by hand.
- We finish the mastic to a tidy line.
Getting ready for the visit
- Move anything stored near the joints
- Keep children and pets away from the work area
- For indoor joints, keep the area dry beforehand if you can
Getting a quote
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints.
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When to call us in Great Coxwell
Shallow joints are a common cause. A thin layer doesn’t hold well, which is why we pack deep voids first and get the depth right.
The problems people generally mention when they call are:
- Gaps round a timber door in stone or brick
- Draughts and rain around sash boxes
- Patchy fillers round a sash window
- Window mastic to renew ahead of painting
Schools such as Faringdon Community College are buildings too, and its window and door frames need their mastic kept sound, just like a home’s.
Comparing quotes
- Whether the sealant suits the joint
- How much experience the applicator has
- Whether VAT is included
- Whether they’re fully insured
DIY sealant or a professional job?
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.
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
Places near Great Coxwell
Other services in Great Coxwell
Honest limits
We will always be straight with you, so here’s what new sealant won’t do:
- Planning or listed building consent (your local planning authority decides)
- Decayed frames that need repair
- Sashes that rattle, stick or will not open
If in doubt, call 0345 464 0079 or drop us an email and we will say what we think.
What we seal
- Stone surrounds
- Timber door frames
- Tenement windows
- Sash and case windows
- Brick reveals
- Period & listed homes
Aftercare tips
Simple care keeps the joints in good condition. Our advice:
- Plan mastic work ahead of painting
- Keep sills and gutters clear so water drains away
- Look over the window mastic once a year
- Avoid heavy scraping on the mastic joint
When preparing windows for paint, take care around the mastic. It can be damaged by heavy scraping.
An open joint round the box lets weather through. The longer it’s left, the more the joint opens.
What sand mastic looks like in Great Coxwell
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 Buscot Park (about 2.6 miles north-west) nearby, there’s older building stock in the area around Great Coxwell 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.
In the older streets around Church of St Giles, the joint between an old wall and a newer frame is usually the first place rain gets in.
Great Coxwell is in Oxfordshire. Jobs in Great Coxwell get the same care as everywhere else we work: old sealant removed completely, careful preparation and a 12-month guarantee. 443 places in Oxfordshire are on our list, large and small. There’s also a page for Oxford, about 18 miles away.
Every address in SN7 is within our area for sand mastic, from the main roads to the quietest streets. Sand mastic is available to properties on Dark Lane, The Hollow Road and The Holloway Road. Neighbouring places we cover for sand mastic include Little Coxwell (1 mile east), Faringdon (1 mile north-east), Longcot (2 miles south) and Fernham (2 miles south-east). Larger places within reach include Abingdon-on-Thames (14 miles east), Witney (11 miles north-east), Carterton (9 miles north), Wantage (9 miles south-east), Grove (8 miles east) and Charlton (9 miles east).
Around Great Coxwell
Typical jobs here are in homes near Eagle Tavern, among other places. A little further out are Faringdon Castle (2.1 miles north-east) and Faringdon Museum (1.7 miles north-east). Open spaces near Great Coxwell include Badbury Hill.
What happens if it’s left?
Before painting the windows, it pays to renew the mastic. Painting over failed mastic doesn’t seal it, and the new mastic is traditionally left unpainted. Older cottages and farmhouses around Great Coxwell can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
We do not show prices on the website, because the cost depends so much on the job itself. For a quick quote, please phone 0345 464 0079 or email us and we’ll talk you through it.
Why us?
- A 12-month guarantee on all work
- Arbo and Everbuild products
- Anti-fungal sanitary silicone in wet areas
- Homes, businesses and hotels
Read our cost guide or what customers say.
Landlord and commercial work in Great Coxwell
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
Water getting past a failed joint can damage the building, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance that we can handle for you.