Oxfordshire · England
Sand mastic for sash & case windows in Stonor, Oxfordshire
Sand mastic across Stonor and nearby, with old sealant always removed completely and a 12-month guarantee.
- Mastic that needs renewing before redecorating
- Crumbling sand mastic round a window
- Old cement repairs round a window that have failed
How we handle sand mastic in Stonor
Our applicators renew the sand mastic around sash and case windows and doors set in stone or brick. The old mastic is raked out, the joint is prepared and new mastic is shaped by hand. We work on stone surrounds, period & listed homes and sash and case windows, and the jobs we see most are draughts and rain around sash boxes and old cement repairs round a window that have failed.
Around Stonor, many homes face open ground, so their windows and doors take the full weather. That exposure dries out and cracks the mastic around frames and sills faster.
You are covered for a year from the day we finish. If there’s a problem with it, please call 0345 464 0079 or drop us an email.
- Place
- Stonor (RG9)
- Region
- Oxfordshire
- Cover
- A year, on every job
- Quote
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
For landlords and businesses
Letting agents and landlords in Stonor can book us as well as householders. Sealant work between tenants is a simple way to keep a property in good order.
For anyone letting property in or around Stonor, jobs at different addresses can go on one quote. Just tell us the addresses and what each one needs.
Do you need sand mastic in Stonor?
Previous repairs in cement or silicone often trap water or crack away. They do not move with the timber, and they generally need raking out.
If you can see any of these, it’s time to have the joints looked at:
- Crumbling sand mastic round a window
- Draughty sash windows at the surround
- Gaps where the frame meets the masonry
- Cracked mastic round a front door frame
Around Stonor, as everywhere, sand mastic is only as good as the preparation behind it.
What your quote should include
- How much experience the applicator has
- Which colour the sealant will be
- Whether the sealant suits the joint
- How long to leave it before use
What happens on the day
You do not need to clear the whole room or building, only the area right around the joints. We protect the rest, and the work takes anything from a few hours to a full day, depending on how many windows in most cases. In a small place like Stonor, access is generally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- Each surround is checked first.
- We rake out the old mastic and clean the joint.
- We fill deep gaps so the new mastic is not too thick.
- New sand mastic is applied and shaped by hand.
- The finish is dressed neatly.
How to prepare
- Let us know if you’ve seen damp or leaks
- Move anything stored near the joints
- Keep pets and children clear of the area while we work
How to get a quote
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is. When it suits you, call 0345 464 0079 or email us.
Advice
Towns and villages near Stonor
Also in Stonor
What sand mastic looks like in Stonor
Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. Historic houses like Stonor Park (about 0.5 miles south-east) are a reminder that the area around Stonor has older buildings as well as new. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic.
In the older streets around Pishill Church, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Stonor is about 5 miles north of Henley-on-Thames, in Oxfordshire. Whether you are in the middle of Stonor or further out, we cover sand mastic for every kind of property, from flats and houses to offices and hotels. Across Oxfordshire, we cover 443 places, and Stonor is one of them. You can also see our page for Reading, about 11 miles away.
We work across RG9 for sand mastic and the streets around it. Neighbouring places we cover for sand mastic include Turville Heath (1 mile north-east), Northend (2 miles north), Christmas Common (2 miles north-west), Cookley Green (3 miles west) and Howe Hill (3 miles north-west). Further out, we also cover Didcot (13 miles west), Thame (10 miles north), Henley-on-Thames (5 miles south), Benson (7 miles west), Chinnor (7 miles north) and Tilehurst (11 miles south-west).
Local landmarks in Stonor
In Stonor, that means homes and buildings near The Crown Inn Public House and the streets around them. Green spaces nearby include Warburg Nature Reserve and Bald Hill.
What sealant work cannot fix
To be straight with you, there are a few things sealant won’t fix:
- Putty and glazing repairs
- Rotten sashes, sills or window boxes (a joiner’s job)
- Sashes that need overhauling
Not sure which it is? You can phone 0345 464 0079 or drop us an email and we will tell you honestly before you book.
Where we work in Stonor
- Brick reveals
- Timber door frames
- Tenement windows
- Stone surrounds
- Period & listed homes
- Sash and case windows
Keeping the joints in good condition
Looking after new joints is easy, and it makes a real difference:
- Check with your local planning authority if your home is listed
- Look over the window mastic once a year
- Plan mastic work ahead of painting
- Take care around the mastic when scraping paint
Make sure water drains away from the window surround. Constant wetting wears the mastic faster.
An open joint round the box lets weather through. Left, the gap tends to get bigger.
Leave it or put it right?
Replacing sash windows is a big decision for a period home, and in listed buildings it may need consent. Where the frames are in good order, new mastic seals the surround. Around Stonor, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
What it costs depends on how much there is to do, how much old material has to come out and how easy the joints are to reach. You’ll have a clear quote before any work starts.
What you get with us
- Neat joints and a tidy finish
- A 12-month guarantee on all work
- Full insurance on every job
- Old sealant always removed completely
Take a look at our cost guide and our reviews.
Your questions about sand mastic in Stonor
Do you cover Stonor for sand mastic?
Yes, Stonor is within the area we cover. Our work covers London and the South East. You can phone 0345 464 0079 or send us an email and tell us what needs doing.
What guarantee comes with sand mastic in Stonor?
Every job comes with our one-year guarantee, wherever it is. We’re also fully insured and ARBOMaster approved.
Is it OK to seal over old sealant?
No. The old sealant always comes out first, so the new sealant bonds properly.
What exactly is sand mastic?
It’s the traditional filler for the joint round timber windows and doors. It combines sand with a linseed-oil-based binder.
Where do you work from?
Our base is Crawley, with over 20 years’ experience. We work across South East England, London and Scotland.
Do you hold any approvals?
Yes. We hold ARBOMaster approved applicator status and we are fully insured too.
Are you insured?
Yes. Full insurance covers our work, and we can confirm the details when we quote.
Do I have to be there?
Access is agreed with you when the job is booked. For inside work, that normally means someone being in.
What affects the cost of sand mastic
There’s no set price list. The quote depends on:
- The product the joint needs
- The number of rooms or windows
- How easy the joints are to reach
- How much old sealant there is and how hard it is to remove
Homes and businesses are quoted the same way: the amount of work, how we reach it and what it needs. Ask us for a quote and we will explain what it covers.
What we need to know
Photos by email are helpful but not essential. Try to tell us:
- Any access issues, like height or stairs
- If it’s domestic, commercial or a hotel
- What’s wrong with the joints now
- Whether it has been sealed before
We don’t publish a price list, because every job is different. Instead, your job gets its own clear quote. To get started, ring 0345 464 0079 or send us an email.