Oxfordshire · England
Sand Mastic in Charlbury
Traditional burnt sand mastic around sash and case windows and doors in stone and brick in Charlbury, with a one-year guarantee on every job. Call for a quick quote.
- Gaps round a timber door in stone or brick
- Crumbling sand mastic round a window
- Wind and rain getting in round a sash window
Windows and doors in Charlbury
The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
For site and facilities teams at buildings such as Charlbury Primary School, its window and door frames need their mastic kept sound, just like a home’s. Homes close to St Mary's Church include some older properties, and the joint between an old wall and a newer frame is normally the first place rain gets in.
Charlbury is about 6 miles north of Witney, in Oxfordshire. From the centre of Charlbury to the outskirts, sand mastic is available for homes and businesses alike. 443 places in Oxfordshire are on our list. Our Oxford page covers work nearby.
All of OX7 is covered for sand mastic. Whether your property is on Market Street, Crawborough Road and Sandford Rise or anywhere close by, we can help. With the B4022 and B4026 close by, Charlbury is simple for us to get to. Neighbouring places we cover for sand mastic include Fawler (2 miles south-east), Spelsbury (2 miles north-west), Finstock (2 miles south), Stonesfield (2 miles south-east) and Ramsden (3 miles south). We also work in nearby towns such as Oxford (13 miles south-east), Banbury (14 miles north-east), Bicester (14 miles east), Witney (6 miles south), Carterton (9 miles south-west) and Kidlington (9 miles south-east).
Local landmarks in Charlbury
Around Charlbury, our work takes us to homes and buildings near Ye Olde Three Horseshoes pub, among other places. The nearest railway station is Charlbury station, roughly 0.5 miles west. Not far away are Blenheim Farm.
Sand mastic in Charlbury, done properly
Traditional burnt sand mastic blends with stone and brick surrounds. It’s a good fit for period properties where a modern sealant bead would stand out. If you have failed mastic on an exposed elevation and window mastic to renew ahead of painting, we can help, on brick reveals, tenement windows and stone surrounds alike.
In smaller places like Charlbury, homes range from older cottages to newer houses, with windows to match: timber, uPVC and aluminium. Each frame material needs the right sealant against the right wall.
We guarantee the work for a year. If something is not right with it in that time, tell us and we’ll put it right.
- Place
- Charlbury (OX7)
- Region
- Oxfordshire
- Cover
- 12 months on all our work
- Quotes
- A clear quote up front
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Also in Charlbury
What we can’t put right
New sealant cannot fix everything, and we will tell you before work begins. Sealant will not put right:
- Planning or listed building consent (your local planning authority decides)
- Masonry that needs repairing
- Rotten sashes, sills or window boxes (a joiner’s job)
Not sure which it is? You can call 0345 464 0079 or send us an email and we’ll tell you honestly before you book.
Joints and surfaces we work on
- Sash and case windows
- Timber door frames
- Brick reveals
- Period & listed homes
- Tenement windows
- Stone surrounds
Common problems we fix in Charlbury
Sand mastic slowly weathers. It hardens, cracks and starts to come away on the stone or timber.
Look out for these signs:
- Weathered mastic on the most exposed windows
- Old sand mastic that has cracked, crumbled or fallen out
- Patchy fillers round a sash window
- Draughts and rain around sash boxes
Letting a property close to Charlbury station? Then cracked sand mastic around sash windows lets in the draughts tenants complain about.
What to look for in a quote
- Whether they’re fully insured
- What happens if they find a problem under the old sealant
- Which colour the sealant will be
- How the joint is cleaned and prepared
Charlbury: your questions answered
Is Charlbury in your area for sand mastic?
Yes, Charlbury is within the area we cover. Our work covers London and the South East. Just call 0345 464 0079 or send us an email with a few details of the job.
Can you help a landlord with a rental near Charlbury station?
Yes, we work for letting agents and landlords. You can phone 0345 464 0079 or email us with the address and a few details, and we will give you a fixed price before we start.
Can new sealant go over the old?
No, because it fails. The old sealant always comes out first, so the new sealant bonds properly.
Do you guarantee sand mastic work?
Every job comes with our one-year guarantee, and we are fully insured.
Is there any odour?
That depends on the sealant. Some products have a noticeable smell, others very little, and any smell fades as they cure.
Should I check with the council before work on a listed or conservation-area home?
Check with your local planning authority. They’ll tell you if consent is needed.
Is it worth trying it myself?
Sometimes. Preparation is everything: all the old sealant out, and a clean, dry joint. If it does not work out, we can redo it.
Do you offer different sealant colours?
Normally, yes. Sealants come in white, clear, grey and other colours for many products, and we agree the colour with you before work begins.
Quotes for sand mastic in Charlbury
For a quick quote, just ask. What matters most is:
- How many rooms, windows or areas are involved
- How much there is to do
- Working hours on commercial sites
- Access and height
The cost depends on how much there is to do, how hard the old material is to remove and how easy the joints are to reach. We give a clear quote before we start, so you know where you stand.
What we need to know
To help us quote quickly, please include:
- Any access issues, like height or stairs
- Photos by email, if that is easy
- If someone has resealed it before
- Where the property is
For a quick quote, get us on the phone, or send an email if you’d rather. Describe what needs sealing and we will talk you through the work.
Aftercare tips
A little care helps the new joints last. We recommend:
- Sort the mastic before the decorators arrive
- Keep sills and gutters clear so water drains away
- Avoid heavy scraping on the mastic joint
- Have rotten timber repaired before new mastic goes in
Look at the mastic when you look over the windows. Small cracks are easier to deal with early.
Once mastic starts to crumble, rain gets in. That water can reach the timber frame and the wall so early renewal protects both.
Should I try it myself first?
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
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.
How the job changes by surface
Tenement and terrace windows
Rows of sash windows on tenements and terraces often need renewing together. We can do one window or several.
Period and listed homes
Sand mastic is the like-for-like choice for many period homes. On listed buildings, check with your planning authority first.
How the visit works
We bring everything the job needs with us. After a quick look at the joints together, the area is protected and the work begins. It normally takes anything from a few hours to a full day, depending on how many windows. In a smaller place like Charlbury, parking is seldom the issue; lanes, gates and long drives are worth mentioning. For outside work, side access and the height of the joints help us plan.
- We check each window surround and the condition of the joint.
- We rake out the old mastic and clean the joint.
- We fill deep gaps so the new mastic is not too thick.
- We point the joint with sand mastic by hand.
- The finish is dressed neatly.
Preparing for the visit
- Mention any sign-in or site rules at work premises
- Mention any tricky access
- Tell us about any previous sealing or DIY attempts
How to get a quote
There’s no standard price list, because every job is different. Instead, your job gets its own clear quote. To arrange one, phone 0345 464 0079 or drop us an email.