Oxfordshire · England
Sand Mastic in Caulcott
Traditional burnt sand mastic around sash and case windows and doors in stone and brick in Caulcott, with a one-year guarantee on every job. Call for a quick quote.
- Old sand mastic that has cracked, crumbled or fallen out
- A silicone bead on a sash window that spoils the look
- Window mastic to renew ahead of painting
What the job involves on each surface
Stone surrounds
Old stone surrounds are often uneven, so the gap is not the same all the way round. Sand mastic is shaped by hand to suit.
Period and listed homes
Many older homes were built with sand mastic round the windows. If your home is listed, ask your local planning authority about consent.
Sand mastic for homes and businesses in Caulcott
Across Caulcott, we renew sand mastic around sash and case windows. Every joint is cleaned out and filled by hand, finished to suit the masonry. We’re often asked to deal with window mastic to renew ahead of painting and draughts and rain around sash boxes, across timber door frames, sash and case windows and tenement windows.
Homes in small places like Caulcott often stand in the open, with little to shelter their windows from wind and rain. Exposed frames and sills lose their mastic sooner than sheltered ones.
There’s a 12-month guarantee on every job, whatever its size.
- Location
- Caulcott (OX25)
- Region
- Oxfordshire
- Cover
- A year, on every job
- Quotes
- Quoted before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Leave it or put it right?
New sash windows are a major, costly change, and in listed buildings it may need consent. Where the frames are in good order, new mastic seals the surround. Older cottages and farmhouses around Caulcott can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
Every job is a little different, so each one gets its own quote. Size, access and the product the joint needs all play a part.
Why choose Mr Mastic in Caulcott
- Domestic, commercial and hotel work
- Any old sealant cut out fully, not covered over
- Approved under the ARBOMaster scheme
- Quality sealants from Arbo and Everbuild
Take a look at how sealant jobs are priced and our reviews.
FAQs for Caulcott
Do you work for landlords with property near Heyford station?
Yes. We work for letting agents and landlords as well as homeowners. Just ring 0345 464 0079 or send us an email with the address and what needs doing, and we will give you a clear price.
Can you do sand mastic in Caulcott?
Yes, Caulcott is within the area we cover. Our work covers London and the South East. Just call 0345 464 0079 or drop us an email with a few details of the job, and we will give you a clear quote.
Can sand mastic be painted?
The usual advice is to leave sand mastic unpainted. Ask us before you decorate around it and we will talk you through it.
What is sand mastic?
It’s a mix of sand and a linseed-oil-based binder. It’s built up in the joint by hand and shaped to suit the surround.
Is sand mastic better than silicone for my windows?
It depends on the window. Period windows in stone or brick usually suit sand mastic, while modern frames normally get a flexible sealant.
Do I need to be at home?
It depends on the job. Inside work needs someone to give us access.
What do you need from me for a quote?
Only a few details: the address or postcode, what’s wrong and any access issues. Then call 0345 464 0079 or drop us an email.
What sealant do you use?
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.
The process
At the end, we look at the finished work together and tell you how long to leave it. The work normally takes a few hours per window, depending on the condition of the joints, depending on the size of the job. Somewhere like Caulcott needs a little journey planning: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- We check the window surrounds and agree which joints need renewing.
- Old, loose mastic is raked out and the joint cleaned.
- We pack any deep gaps so the mastic sits at the right depth.
- The mastic is mixed, pressed into the joint by hand and shaped.
- We dress the surface so it sits neatly against the masonry.
How to prepare
- Let us know about earlier repairs to the joints
- Where the joints are inside, avoid wetting them before we arrive
- Tell us if parking is tricky
Ask for 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, and add pictures by email if you can.
Read more
DIY versus a professional finish
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
Sealing over old silicone is the commonest DIY error. New silicone won’t bond to old, so it lifts and traps water and mould underneath. Everything old must be removed first.
Keeping the joints in good condition
After the cure time, these simple habits help:
- Find out about consent before window work on a listed home
- Get any rot dealt with first
- Ask us before painting near the mastic
- Plan mastic work ahead of painting
Keep gutters and sills clear so water runs away from the surround. Constant wetting wears the mastic faster.
Crumbling mastic lets rain into the joint. It can soak into the frame and the surrounding masonry so early renewal protects both.
Places near Caulcott
What else we do in Caulcott
Frames and glazing around Caulcott
Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Homes close to Heyford Park Chapel include some older properties, and replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint. For landlords with property near Heyford station, any sash windows need sound mastic to keep draughts and rain out.
Caulcott is about 5 miles west of Bicester, in Oxfordshire. We provide sand mastic to homes and businesses in Caulcott and nearby, as part of our work across Oxfordshire. Caulcott is one of 443 towns and villages in Oxfordshire where we work for sand mastic. There’s also a page for Oxford, roughly 11 miles from Caulcott.
All of OX25 is covered for sand mastic. If you need sand mastic at a property on South Street, Lower Heyford Road and Greenway or a nearby road, our applicators can take on the job. We also cover the places around Caulcott: Upper Heyford (1 mile north), Lower Heyford (1 mile west), Middleton Stoney (2 miles east), Ardley (3 miles north-east) and Somerton (3 miles north). Further out, we also cover Oxford (11 miles south), Banbury (11 miles north), Bicester (5 miles east), Witney (13 miles south-west), Kidlington (7 miles south) and Headington Quarry (11 miles south).
Around Caulcott
The closest station to Caulcott is Heyford station, roughly 1.6 miles west of the centre. Nearby you’ll also find Bicester Community Hospital (4.6 miles east) and Ardley Castle (2.7 miles north-east).
What we cannot put right
We’ll always be straight with you, so here’s what new sealant will not do:
- Crumbling stone or brickwork round the window
- Sash cords, weights and draught-proofing of the sashes
- Cracked or broken glass
If in doubt, phone 0345 464 0079 or email us and we’ll say what we think before booking.
Where we work in Caulcott
- Sash and case windows
- Brick reveals
- Tenement windows
- Stone surrounds
- Timber door frames
- Period & listed homes
What affects the cost of sand mastic
Every job gets its own quote. These are the things that affect it:
- The size of the job
- How many rooms, windows or areas are involved
- The type of sealant required
- The old material and how stubborn it is
The cost reflects the work involved, not guesswork. That is why we ask about the job first and agree the price before starting.
Helping us quote
To help us quote quickly, let us know:
- The address or postcode of the job
- A few photos by email, if you can
- How many joints, rooms or windows are involved
- Access, such as stairs, a lift or height
We do not publish a price list. Instead, your job gets its own clear quote. To arrange one, phone 0345 464 0079 or send us an email.