Oxfordshire · England
Sand Mastic in Cothill
Problem with your window and door surrounds in Cothill? We cut out the old, prepare the joints and apply the right sealant, with a one-year guarantee.
- Mastic that needs renewing before redecorating
- Mastic round period door frames that has failed
- Mastic dropping out of the joint
Sand mastic for homes and businesses in Cothill
Sand mastic does not last for ever and gaps open up round the frame. We rake it out and renew it and tidies the surround. If you are dealing with gaps between timber frames and stone or brick and tired mastic found when preparing windows for paint, we can put it right, on sash and case windows, stone surrounds and tenement windows alike.
Outdoor sealant needs dry, clean surfaces, so work on frames around Cothill is planned for dry weather. Tell us about access to every side of the house, including upper-floor windows.
Our work is backed for twelve months.
- Place
- Cothill (OX13)
- Wider area
- Oxfordshire
- Cover
- 12 months on all our work
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Sand mastic in Cothill: local notes
Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. With historic houses such as Appleton Manor (about 1.8 miles north-west) nearby, there’s older building stock in the area around Cothill as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window.
Schools such as Dry Sandford Primary School are buildings too, and its window and door frames need their mastic kept sound, just like a home’s. For an older house near a landmark such as Church of St Helen, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Cothill is about 2 miles north-west of Abingdon-on-Thames, in Oxfordshire. Homes, rented property, offices and hotels in Cothill is covered for sand mastic. The work is guaranteed for a year. Cothill is one of 443 towns and villages in Oxfordshire we cover for sand mastic. You can also see our page for Oxford, about 6 miles away.
All of OX13 is within our area for sand mastic. Other places close to Cothill include Dry Sandford (1 mile north-east), Shippon (1 mile south-east), Frilford Heath (1 mile south-west), Tubney (2 miles west) and Marcham (2 miles south). We also work in nearby towns such as Oxford (6 miles north-east), Didcot (7 miles south-east), Witney (10 miles north-west), Carterton (12 miles north-west), Wantage (8 miles south-west) and Grove (7 miles south-west).
Around Cothill
In Cothill, that means homes and buildings near Merry Miller pub and Larkmead School and the streets around them. For rail, the closest station is Radley station, about 3.9 miles east. A little further out are Abingdon Community Hospital (2 miles south-east) and FitzHarris Castle (2.4 miles south-east). Green spaces nearby include Cumnor Hill and Dry Sandford Pit.
Should I try it myself first?
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
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 does not work out, we can still put it right.
Different surfaces, different methods
Stone surrounds
Stone surrounds suit sand mastic well. The finish blends with the masonry.
Timber door frames
A neat sand mastic joint round a front door suits a period home.
Towns and villages near Cothill
Other services in Cothill
What sealant work cannot fix
We will not take on work that will not last, so these are the limits:
- Damaged stone surrounds
- Timber that has rotted
- Planning or listed building consent (your local planning authority decides)
Not sure which it is? You can phone 0345 464 0079 or send us an email and we’ll tell you honestly before booking.
Joints and surfaces we work on
- Brick reveals
- Sash and case windows
- Timber door frames
- Period & listed homes
- Stone surrounds
- Tenement windows
What we’re called out for in Cothill
Timber swells and shrinks with the weather. The movement cracks the mastic over time.
It’s worth asking for a quote if you see:
- Mastic worn away on windows facing the weather
- Mastic round period door frames that has failed
- Window mastic to renew ahead of painting
- Mastic dropping out of the joint
Rented homes near Radley station change hands often, and any sash windows need sound mastic to keep draughts and rain out.
Questions to ask before you book
- How long the guarantee is
- Which sealant they’ll use, and why
- Whether they seal over old material or remove it
- Which colour the sealant will be
Questions from Cothill
Do you cover Cothill for sand mastic?
Yes. We work across London and the South East, and Cothill is part of that. You can call 0345 464 0079 or email us and let us know what needs doing.
I let a flat near Radley station. Can you help?
Yes. We work for landlords and letting agents as well as homeowners. You can ring 0345 464 0079 or email us with the details for a clear quote.
Do I have to be there?
Access is agreed with you when the job is booked. Indoors, that usually means someone at home.
Where are you based?
We’re a Crawley-based firm, with over 20 years’ experience. We work across South East England, London and Scotland.
Can you do several jobs on one visit?
Of course. Doing several areas at once is generally more efficient.
Are you an approved applicator?
Yes. We hold ARBOMaster approved applicator status.
Is it possible to take out silicone and use sand mastic instead?
Yes, we do this often. The old silicone has to come out completely so the mastic beds in well.
What does sand mastic cost?
Size, access and the old material all affect the cost. Ask us for a quote and we’ll talk you through it.
Leave it or put it right?
An open joint round the frame lets weather in. Water can get to the frame and the masonry, so dealing with it now protects both. Older cottages and farmhouses around Cothill can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
Combining jobs into one visit is normally more efficient than separate visits, so it’s worth mentioning everything you’d like done. You’ll get one clear quote for the whole job.
Why book with us
- Experience in homes, commercial sites and hotels
- Old sealant always removed completely
- Sanitary silicone with an anti-fungal additive in wet areas
- We leave the area clean and tidy
See our cost guide or our reviews.
Quotes for sand mastic in Cothill
For a quick quote, just ask. The main things that affect it are:
- Which sealant suits the joint
- The size of the job
- Mould in or behind the old joints
- How much old sealant there is and how hard it is to remove
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 send us an email for an honest opinion and a quote.
Asking for a quote
What to tell us when you ask for a quote:
- Whether it has been sealed before
- How we’d reach the joints
- Whether it’s a home or a business
- Pictures of the joints, sent by email
For a quick quote, get us on the phone, or email us if that’s easier. Describe what needs sealing and we’ll explain what’s involved and send you a clear quote.
How the visit works
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. In total, it normally takes a few hours for a single window, longer for several. For a village or hamlet like Cothill, 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.
- Each surround is checked first.
- We rake out the old mastic and clean the joint.
- Large voids are packed out.
- We point the joint with sand mastic by hand.
- We finish the mastic to a tidy line.
Before we arrive
- Clear items away from the joints we’re working on
- Tell us about any water getting in
- Mention any sign-in or site rules at work premises
How to get a quote
For a quote, call 0345 464 0079 or email us with the location and a short description of the problem. We’ll send you a clear quote before any work starts.