Oxfordshire · England
Sandford St Martin Sand Mastic
Specialist sand mastic for Sandford St Martin: the right sealant, proper preparation and a neat finish. Ask us for a quick quote.
- Mastic worn away on windows facing the weather
- Cracked mastic round a front door frame
- Gaps where the frame meets the masonry
Sandford St Martin questions
Can you help a landlord with a rental near Heyford station?
Yes, we work for letting agents and landlords. 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 any work starts.
Is Sandford St Martin in your area for sand mastic?
Yes. Our work covers London and the South East, and Sandford St Martin is part of that. Just phone 0345 464 0079 or drop us an email with a few details of the job, and we will give you a clear quote.
Do you work for hotels and businesses?
Yes. We can plan bigger jobs in stages to suit the site.
Can I add another job to the visit?
Yes, we can. Several rooms, windows or areas can go on one quote.
Is it OK to seal over old sealant?
No. We remove every bit of old sealant first.
What do you put in the joint?
The product depends on the job: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. We use products from Arbo and Everbuild.
Do you remove the old sealant?
Yes, every time. New silicone does not stick to old silicone, so the joint is cleaned back first.
Do you offer different sealant colours?
In most cases you can choose. We’ll tell you which colours the right product comes in.
How we handle sand mastic in Sandford St Martin
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. We work on stone surrounds, sash and case windows and timber door frames, and the jobs we see most are weathered mastic on the most exposed windows and draughts and rain around sash boxes.
In a village or hamlet like Sandford St Martin, older cottages and farmhouses often have timber windows set in stone or brick. Not every older frame suits a modern silicone bead, 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.
- Location
- Sandford St Martin (OX7)
- Region
- Oxfordshire
- Guarantee
- One year on every job
- Quote
- A clear price before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Places near Sandford St Martin
What else we do in Sandford St Martin
Windows and doors in Sandford St Martin
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.
Letting a property close to Heyford station? Then any sash windows need sound mastic to keep draughts and rain out.
Sandford St Martin is about 9 miles south of Banbury, in Oxfordshire. Sandford St Martin gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a 12-month guarantee. Sandford St Martin is one of 443 towns and villages in Oxfordshire we cover for sand mastic. Oxford is on our list too, about 14 miles from Sandford St Martin.
Every address in OX7 is within our area for sand mastic, from the main roads to the quietest streets. Whether your property is on Mill Lane, Manor Road and Ledwell Road or anywhere close by, we can help. If you’re just outside Sandford St Martin, we cover Westcott Barton (1 mile south-east), Middle Barton (1 mile east), Nether Worton (2 miles north), Steeple Barton (2 miles south-east) and Duns Tew (3 miles north-east). Further out, we also cover Oxford (14 miles south-east), Banbury (9 miles north), Bicester (10 miles east), Witney (11 miles south-west), Carterton (15 miles south-west) and Kidlington (9 miles south-east).
Landmarks near Sandford St Martin
Around Sandford St Martin, our work takes us to homes and buildings near The Fox Public House, among other places. For rail, the closest station is Heyford station, roughly 4.1 miles east. Nearby you’ll also find Deddington Castle (4.5 miles north-east) and Old Forge Museum (Great Tew) (2.3 miles north-west).
Different surfaces, different methods
Stone surrounds
The stone is treated with care while raking out the old mastic.
Brick reveals
Brick reveals round timber windows are often pointed with sand mastic. It suits older brickwork.
Aftercare tips
Good habits help new joints last longer. A few tips:
- Keep modern sealant off the mastic
- Inspect the joints round the windows every year or so
- Make sure water runs off the sill
- Renew mastic before redecorating the windows
When preparing windows for paint, take care around the mastic. Hard scraping can loosen it.
It’s best to renew mastic before painting the windows. Paint over cracked mastic only covers it up.
Landlord and commercial work in Sandford St Martin
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements.
We also work for property managers and facilities teams. We can quote a run of properties together.
What we do, step by step
Our applicators work methodically: protect, prepare, seal, tidy. For most jobs that takes a few hours per window, depending on the condition of the joints. Somewhere as small as Sandford St Martin, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- First we agree which joints need doing.
- We remove the old, loose mastic.
- Deep gaps are packed so the mastic sits at the right depth.
- The sand mastic is mixed and pressed into the joint by hand.
- The surface is finished to suit the stone or brick.
Getting ready for the visit
- Let us know about stairs, lifts or work at height
- Move anything stored near the joints
- Keep children and pets away from the work area
Ask for a quote
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints, and add photos by email if you can.
Read more
Do you need sand mastic in Sandford St Martin?
Some old mastic was never deep enough. A thin layer does not hold well, which is why we pack deep voids first and get the depth right.
Most people get in touch after spotting one of these:
- Wind and rain getting in round a sash window
- Window mastic to renew ahead of painting
- Cement or filler used on old window joints that has cracked
- Mastic round period door frames that has failed
In the older streets around Church of St Martin, the joint between an old wall and a newer frame is generally the first place rain gets in.
Questions to ask before you book
- What the quote includes, VAT included or not
- Whether all the old sealant comes out first
- How hidden problems are handled
- What insurance they hold
When something else is needed
We won’t take on work that won’t last, so these are the limits:
- Sashes that need overhauling
- Cracked or broken glass
- Planning or listed building consent (your local planning authority decides)
If you are not sure, just ring 0345 464 0079 or drop us an email and we will give you a straight answer.
Surfaces we seal
- Sash and case windows
- Timber door frames
- Brick reveals
- Tenement windows
- Period & listed homes
- Stone surrounds
Leave it or put it right?
Replacing sash windows is a big decision for a period home and on a listed home, consent may be needed. If the frames are sound, renewing the mastic deals with gaps and draughts at the surround. In a small place like Sandford St Martin, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
A failed joint rarely gets cheaper to fix by waiting, because water and mould keep working on it. If you are unsure, phone 0345 464 0079 or drop us an email for an honest opinion and a quote.
Why choose Mr Mastic in Sandford St Martin
- Approved under the ARBOMaster scheme
- Homes, businesses and hotels
- 12-month guarantee on every job
- Over 20 years’ experience
See what affects the cost and customer reviews.