Oxfordshire · England
Kingston Stert Sand Mastic
Problem with your window and door surrounds in Kingston Stert? We cut out the old, prepare the joints and apply the right sealant, with a one-year guarantee.
- Draughty sash windows at the surround
- Cracked mastic round a front door frame
- Gaps between timber frames and stone or brick
How we quote for sand mastic
You will get a clear quote before any work starts. It’s based on:
- The number and length of the joints
- The product the joint needs
- Whether the work is at height
- Mould in or behind the old joints
Instead of a standard rate, we look at what your job involves: the amount of work, the old material and the access. You will know the price before we begin.
Helping us quote
The more you tell us, the more accurate the quote. When you get in contact, it helps to mention:
- Any access issues, like height or stairs
- Whether it’s a home or a business
- A few photos by email, if you can
- How many joints, rooms or windows are involved
There’s no standard price list, as no two jobs are quite the same. Instead, your job gets its own clear quote. To arrange one, call 0345 464 0079 or email us.
Sand mastic for homes and businesses in Kingston Stert
Silicone on a period window often looks wrong and is not always the right material. Sand mastic is the traditional choice, and we can replace one with the other. We work on timber door frames, brick reveals and period & listed homes, and people most often call us about modern sealant on a period surround and tired mastic found when preparing windows for paint.
Around Kingston Stert, 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’re covered for a year from the day we finish. If anything is not right with it, phone 0345 464 0079 or email us.
- Location
- Kingston Stert (OX39)
- Wider area
- Oxfordshire
- Guarantee
- 12 months on all our work
- Quotes
- A clear price before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Work for landlords, hotels and businesses
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
We regularly work with letting and managing agents. Tell us the address, the job and how access works and we will quote.
How to look after the new joints
No joint lasts for ever, but care makes a real difference. Our tips:
- Ask the planning authority about consent for listed or conservation-area homes
- Get any rot dealt with first
- Leave the new mastic unpainted
- Avoid patching sand mastic with silicone
Avoid sealing over the mastic with silicone. If you see a crack, ask us to take a look before trying a quick fix.
Sound mastic protects the frame. Once it fails, water can sit against the timber and timber that stays wet can rot.
Kingston Stert homes and the weather
The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. Historic houses like Adwell House (about 2.1 miles south-west) are a reminder that the area around Kingston Stert 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 Church of St Mary, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. For site and facilities teams at buildings such as Aston Rowant Church of England Primary School, larger buildings have plenty of frames, and the mastic around each one ages.
Kingston Stert is about 3 miles south of Thame, in Oxfordshire. Whether you’re in the middle of Kingston Stert or further out, we cover sand mastic for every kind of property, from flats and houses to offices and hotels. We cover 443 towns and villages across Oxfordshire, large and small. For nearby work, see our Oxford page, about 13 miles away.
Jobs for sand mastic in OX39 is quoted and booked the same way as anywhere else. We also cover Sydenham (1 mile north-east), Emmington (1 mile north-east), Chinnor (2 miles east), Towersey (3 miles north) and Thame (3 miles north). We also work in nearby towns such as Oxford (13 miles west), Didcot (14 miles south-west), Abingdon-on-Thames (14 miles west), Henley-on-Thames (12 miles south), Benson (9 miles south-west) and Headington Quarry (11 miles west).
Near you in Kingston Stert
Typical jobs here are in homes near The Crown Inn. For rail, the closest station is Princes Risborough station, about 4.6 miles east. A little further out are Thame Museum (3.5 miles north-west) and Thame Community Hospital (3 miles north). For a walk, there’s Bald Hill and Oakley Hill nature reserve.
More services for Kingston Stert
When to call us in Kingston Stert
Sand mastic slowly weathers. It hardens, cracks and starts to come away from the frame or the masonry.
It’s worth asking for a quote if you see:
- Gaps where the frame meets the masonry
- Old sand mastic that has cracked, crumbled or fallen out
- Gaps round a timber door in stone or brick
- Tired mastic found when preparing windows for paint
Rented homes near Princes Risborough station change hands often, and older sash windows in a rental need their mastic kept sound to keep the weather out.
Comparing quotes
- Which colour the sealant will be
- What the cure time is
- How much experience the applicator has
- Which sealant they’ll use, and why
What sealant work can’t fix
Honest advice matters more to us than a booking, so here’s what sealant cannot fix:
- Rotten sashes, sills or window boxes (a joiner’s job)
- Cracked or broken glass
- Sashes that rattle, stick or won’t open
If you are not sure, just phone 0345 464 0079 or email us and we will give you a straight answer before booking.
Surfaces we seal
- Brick reveals
- Sash and case windows
- Period & listed homes
- Tenement windows
- Stone surrounds
- Timber door frames
How the visit works
We bring everything the job needs with us, so there’s nothing for you to buy. After a quick look at the joints together, we protect the area and start. Most jobs take a few hours per window, depending on the condition of the joints. Somewhere as small as Kingston Stert, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- We start by checking each surround and agreeing the joints to renew.
- The loose and crumbling mastic is raked out and the joint cleaned.
- We pack any deep gaps so the mastic sits at the right depth.
- The mastic is mixed, pressed into the joint by hand and shaped.
- The mastic is finished to sit tidily against the stone or brick.
Before we arrive
- Tell us if parking is tricky
- Mention if the joints have been sealed before
- Where the joints are inside, avoid wetting them before we arrive
Get a quote
To get a quote, phone 0345 464 0079 or email us and tell us where the job is and what the problem looks like. You will have a clear quote before any work starts.
Advice
What the job involves on each surface
Sash and case windows
The mastic round a sash window is on show so we finish it carefully.
Timber door frames
A neat sand mastic joint round a front door suits a period home.
FAQs for Kingston Stert
Can you do sand mastic in Kingston Stert?
Yes. Our work covers London and the South East, and Kingston Stert is part of that. Just phone 0345 464 0079 or send us an email with a few details of the job.
I let a flat near Princes Risborough station. Can you help?
Yes, rental work is part of what we do. Just call 0345 464 0079 or email us and tell us about the property, and we’ll send you a clear quote.
Are you ARBOMaster approved?
Yes. We are an ARBOMaster approved applicator, which is run for the Arbo sealant brand.
What sealant do you use?
Each joint gets the product that suits it. Where it moves, gets wet or faces the weather makes a difference, and we will tell you what we are using.
Can old silicone round a sash window be swapped for sand mastic?
In most cases. We remove the silicone and clean the joint before the sand mastic goes in.
Is it worth trying it myself?
You can, for simple jobs. The key is preparation: remove all the old material and work on a clean, dry joint. We can always put it right if it fails.
Can you match the sealant colour?
Usually, yes. Sealants come in white, clear, grey and other colours for many products, and we agree the colour with you before work begins.
What should I tell you?
Let us know what needs doing and where, with photos by email if possible. If we need more, we’ll ask.