Oxfordshire · England
Sand mastic for sash & case windows in Little Coxwell, Oxfordshire
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homeowners, landlords and businesses in Little Coxwell. Fully insured, ARBOMaster approved and guaranteed for a year.
- Gaps between timber frames and stone or brick
- Old sand mastic that has cracked, crumbled or fallen out
- Tired mastic found when preparing windows for paint
How we handle sand mastic in Little Coxwell
Sand mastic does not last for ever and gaps open up round the frame. Renewing it closes the gap so the surround looks right again. If you have window mastic to renew ahead of painting and old cement repairs round a window that have failed, we can help, whatever the surface.
Outdoor sealant needs dry, clean surfaces, so work on frames around Little Coxwell is planned for dry weather. Tell us about access to every side of the house, including upper-floor windows.
Big or small, you get the same one-year guarantee.
- Location
- Little Coxwell (SN7)
- Wider area
- Oxfordshire
- Guarantee
- One year on every job
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
How the visit works
When we get to you, we compare the joints with what we discussed. If we find something unexpected, we talk it through with you first. After that, the work takes a few hours per window, depending on the condition of the joints. Somewhere like Little Coxwell needs a little journey planning: 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 look at the surrounds with you and agree the joints to renew.
- Old mastic and any loose material are raked out.
- We pack any deep voids first.
- We apply the mastic by hand and shape it.
- The surface is finished to suit the stone or brick.
Before we arrive
- Move anything stored near the joints
- For business premises, tell us about site rules or sign-in
- Mention any tricky access
How to get a quote
There’s no standard price list. Instead, we give you a clear quote for your job. To arrange one, call 0345 464 0079 or send us an email.
Advice
DIY sealant or a professional job?
Sealing over old silicone is the commonest DIY error. Silicone doesn’t stick to old silicone, so it peels away and traps moisture behind it. Everything old must be removed first.
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, then guaranteed for a year.
What sand mastic looks like in Little Coxwell
Historic houses like Buscot Park (about 3.2 miles north-west) are a reminder that the area around Little Coxwell 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. Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Homes close to Church of St Mary include some older properties, and the joint between an old wall and a newer frame is usually the first place rain gets in. Managing a site like Faringdon Community College? Then the mastic around its windows and doors needs looking after like any other building’s.
Little Coxwell is about 1 mile south of Faringdon, in Oxfordshire. From the centre of Little Coxwell to the outskirts, sand mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Little Coxwell is one of 443 towns and villages in Oxfordshire we cover for sand mastic. Oxford is on our list too, around 17 miles away.
Every address in SN7 is within our area for sand mastic. We also cover Faringdon (1 mile north), Fernham (1 mile south-east), Shellingford (2 miles east), Baulking (3 miles south-east) and Uffington (3 miles south-east). Further out, we also cover Didcot (15 miles east), Abingdon-on-Thames (14 miles east), Witney (11 miles north-east), Carterton (9 miles north), Wantage (8 miles south-east) and Grove (8 miles east).
Local landmarks in Little Coxwell
Locally, jobs take us to homes and businesses close to Faringdon Infant School and Eagle Tavern. Other landmarks nearby include Faringdon Day Hospital (1.2 miles north) and Faringdon Museum (1.4 miles north). Green spaces nearby include Badbury Hill.
What happens if it’s left?
Not every draught comes from the sashes themselves. Open mastic joints round the box can let air in and new mastic seals them. Where a wall is exposed, as many are in small places like Little Coxwell, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
A failed joint rarely gets cheaper to fix by waiting, as water and mould keep getting in. If you are not sure whether it needs doing, call 0345 464 0079 or email us and we will give you an honest view and a quote.
Why choose Mr Mastic in Little Coxwell
- We never seal over old sealant
- Domestic, commercial and hotel work
- We leave the area clean and tidy
- Rated 4.9 stars on Google
Take a look at our cost guide and what customers say.
Questions from Little Coxwell
Do you cover smaller places like Little Coxwell?
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.
Is there a guarantee on sand mastic in Little Coxwell?
All our work, in Little Coxwell and everywhere else, comes with a 12-month guarantee. We’re also fully insured and ARBOMaster approved.
How long does sand mastic take to go off?
The surface skins quite quickly and it hardens fully over a longer time. The weather and joint depth both affect it.
Do you work for landlords and businesses?
Yes, often. Several properties can go on one quote, and between tenancies is a good time for the work.
What does sand mastic cost?
We do not publish prices, because the cost depends on the job: its size, the old material, access and the product needed. We agree the price before any work begins.
Can you do several jobs on one visit?
Yes. Tell us about everything you’d like done.
Can tenants book the work?
We can work for tenants, landlords or agents. Get your landlord’s agreement first.
What should I tell you?
Tell us what needs doing and where, with photos by email if possible. If we need more, we will ask.
How we quote for sand mastic
The price is agreed before any work begins. It takes into account:
- The product the joint needs
- Whether there’s mould to deal with
- The number and length of the joints
- Access and height
No two jobs are quite the same, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all play a part, and we will explain the quote if you ask.
What we need to know
When you call or email, these details help:
- Roughly how big the job is
- Photos by email, if that is easy
- Any access issues, like height or stairs
- If it’s domestic, commercial or a hotel
To get a quote, call 0345 464 0079 or send us an email with the location and a short description of the problem. We’ll give you a clear price before any work starts.
Also near Little Coxwell
Also in Little Coxwell
What we can’t put right
In fairness, there are a few things sealant will not fix:
- Masonry that needs repairing
- Putty and glazing repairs
- Decayed frames that need repair
Not sure which it is? You can call 0345 464 0079 or send us an email and we will tell you honestly before booking.
What we seal
- Stone surrounds
- Timber door frames
- Brick reveals
- Period & listed homes
- Tenement windows
- Sash and case windows
Landlord and commercial work in Little Coxwell
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
Whether it’s one flat or a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
Keeping the joints in good condition
Joint life depends on how it’s used and looked after. Here’s what we suggest:
- Renew mastic before redecorating the windows
- Find out about consent before window work on a listed home
- Go gently near the mastic when preparing windows
- Keep sills and gutters clear so water drains away
Look at the mastic when you look over the windows. Catching cracks early keeps repairs small.
Crumbling mastic lets rain into the joint. That water can reach the timber frame and the wall, so renewing it early is worth it.