Oxfordshire · England
Sunningwell Sand Mastic
Our applicators work in Sunningwell on traditional burnt sand mastic around sash and case windows and doors in stone and brick. Old sealant removed completely, joints prepared properly and every job guaranteed for a year.
- Old cement repairs round a window that have failed
- Failed mastic on an exposed elevation
- Draughts and rain around sash boxes
When to call us in Sunningwell
Most of it is simply age. Sand mastic is a maintenance item like any pointing and how long it lasts depends on the weather it faces.
Signs it’s time to call us include:
- A silicone bead on a sash window that spoils the look
- Old sand mastic that has cracked, crumbled or fallen out
- Failed mastic on an exposed elevation
- Tired mastic found when preparing windows for paint
If you live in an older home near Church of St Leonard, the joint between an old wall and a newer frame is normally the first place rain gets in.
What your quote should include
- What guarantee comes with the work
- How the colour is chosen
- What the cure time is
- Who turns up on the day
About our sand mastic in Sunningwell
Silicone on a period window often looks wrong and doesn’t suit the building. Sand mastic gives a finish that matches the age of the house, and we can replace one with the other. If you’re dealing with crumbling sand mastic round a window and mastic round period door frames that has failed, we can help.
Around Sunningwell, many homes face open ground, so their windows and doors take the full weather. Exposed frames and sills lose their mastic sooner than sheltered ones.
You’re covered for a year from the day we finish. If there’s a problem with it, please call 0345 464 0079 or email us.
- Location
- Sunningwell (OX13)
- Wider area
- Oxfordshire
- Cover
- One year on every job
- Quotes
- A clear price before work begins
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Nearby places to Sunningwell
More services for Sunningwell
Looking after it afterwards
Aftercare is simple, and it makes a real difference:
- Look over the window mastic once a year
- Check with your local planning authority if your home is listed
- Ask us before painting near the mastic
- Ask a joiner to look at soft timber first
Avoid sealing over the mastic with silicone. If anything cracks, get it looked at before trying a quick fix.
Crumbling mastic lets rain into the joint. That water can reach the timber frame and the wall so early renewal protects both.
Leave it or put it right?
New sash windows are a major, costly change and on a listed home, consent may be needed. Where the frames are in good order, new mastic seals the surround. Where a wall is exposed, as many are in small places like Sunningwell, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
What it costs depends on the size of the job, how much old material has to come out and how easy the joints are to reach. We give a clear quote before we start, so you know where you stand.
Why Sunningwell customers choose us
- 20+ years of sealant experience
- Domestic, commercial and hotel work
- We never seal over old sealant
- Rated 4.9 stars on Google
Take a look at how sealant jobs are priced or customer reviews.
FAQs for Sunningwell
Can you do sand mastic in Sunningwell?
Yes. Our work covers London and the South East, and Sunningwell is part of that. Just call 0345 464 0079 or drop us an email with a few details of the job, and we’ll send you a clear quote.
Do you work for landlords with property near Radley station?
Yes, landlords and agents are among the people we work for. Just call 0345 464 0079 or send us an email with the address and what needs doing, and we’ll give you a clear price.
Should I try DIY first?
That depends on the joint. High-level, external movement and fire-rated joints are professional jobs.
Can you work on commercial sites?
Yes, regularly. Larger jobs can be planned room by room or area by area to suit the site.
Are you insured?
Yes. Full insurance covers our work, and we can confirm the details when we quote.
Are you ARBOMaster approved?
Yes. We’re ARBOMaster approved, the scheme for applicators of Arbo sealants.
Do you take out the old sealant first?
Yes, every time. New sealant will not bond properly to old, so the joint is cleaned back first.
Can I add another job to the visit?
Yes, we can. Several rooms, windows or areas can go on one quote.
Should I try it myself first?
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and doesn’t move well, and the joint depth matters as much as the finish.
A DIY attempt does not rule out a professional job. We remove it and do the joint properly, so just mention it when you contact us.
Windows and doors in Sunningwell
Historic houses like Appleton Manor (about 3.2 miles west) are a reminder that the area around Sunningwell has older buildings as well as new. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic. Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Letting a property close to Radley station? Then cracked sand mastic around sash windows lets in the draughts tenants complain about. If you look after a building such as Sunningwell Church of England Primary School, larger buildings have plenty of frames, and the mastic around each one ages.
Sunningwell is about 2 miles north of Abingdon-on-Thames, in Oxfordshire. Jobs in Sunningwell get the same care as everywhere else we work: old sealant removed completely, careful preparation and a 12-month guarantee. Our area takes in 443 places across Oxfordshire.
All of OX13 is within our area for sand mastic. Whether your property is on Bullsmead, Dark Lane and Sunningwell Road or a nearby road, we can help. Neighbouring places we cover for sand mastic include Bayworth (1 mile north-east), Boars Hill (1 mile north), Chilswell (2 miles north), Hinksey Hill (2 miles north-east) and Kennington (2 miles east). We also work in nearby towns such as Oxford (4 miles north-east), Didcot (7 miles south), Bicester (15 miles north), Witney (11 miles north-west), Carterton (14 miles west) and Thame (14 miles east).
What’s near Sunningwell
We work in homes and buildings around Albert Park, Fitzharrys School and The Flowing Well pub and the streets around them. The closest station to Sunningwell is Radley station, roughly 2.3 miles south-east. Well-known places in the area include Westgate Shopping Centre (3.6 miles north) and Abingdon Community Hospital (2.2 miles south). Not far away are Harcourt Hill and Lashford Lane Fen.
How the visit works
All our tools and materials come with us in the van, so there’s nothing for you to buy. After a quick look at the joints together, the area is protected and the work begins. It normally takes a few hours for a single window, longer for several. Somewhere like Sunningwell 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.
- Deep voids are packed so the mastic is the right thickness.
- We mix the sand mastic and apply it by hand, shaping it to the joint.
- The mastic is finished to sit tidily against the stone or brick.
How to prepare
- For indoor joints, keep the area dry beforehand if you can
- Tell us about any previous sealing or DIY attempts
- Move anything stored near the joints
Getting a quote
Getting a quote is simple: tell us what needs doing and where. Photos by email help us understand the job.
Related advice
Landlord and commercial work in Sunningwell
In hotels, rooms out of use cost money, so the work can be planned room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
We regularly work with letting and managing agents. Tell us the address, the job and how access works and we’ll quote.
Different surfaces, different methods
Brick reveals
Sand mastic is also used where timber frames meet brick. It gives a traditional finish.
Stone surrounds
Stone surrounds suit sand mastic well. It finishes to look like part of the surround.