Oxfordshire · England
Sand mastic for sash & case windows in Kidlington, Oxfordshire
Specialist sand mastic for Kidlington: careful preparation, the right product and tidy work. Ask us for a quick quote.
- Weathered mastic on the most exposed windows
- Window mastic to renew ahead of painting
- Gaps between timber frames and stone or brick
DIY versus a professional finish
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.
The biggest DIY mistake is sealing over old sealant. Silicone doesn’t stick to old silicone, so it lifts and traps water and mould underneath. All the old material has to come out first.
Sand mastic in Kidlington, done properly
Silicone on a period window often looks wrong and doesn’t suit the building. Sand mastic is the traditional choice, and we can replace one with the other. Typical jobs include window mastic to renew ahead of painting and gaps between timber frames and stone or brick, across brick reveals, sash and case windows and tenement windows.
In a smaller place like Kidlington, some walls face open ground and catch the full force of the weather, so exposed windows and doors face the weather head on. That’s hard on the mastic around frames and sills.
All of our work is guaranteed for twelve months, and the guarantee is the same wherever you are.
- Location
- Kidlington (OX5)
- Region
- Oxfordshire
- Guarantee
- A year, on every job
- Quotes
- A clear price before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
How the visit works
We work through the job in order: protection first, then preparation, sealing and a tidy-up. Typically it takes anything from a few hours to a full day, depending on how many windows, and the area is left clean. A visit to Kidlington is planned like any other: the time, the access and where to park are agreed in advance. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- We check the window surrounds and agree which joints need renewing.
- Old, loose mastic is raked out and the joint cleaned.
- We pack any deep gaps so the mastic sits at the right depth.
- We mix the sand mastic and apply it by hand, shaping it to the joint.
- We dress the surface so it sits neatly against the masonry.
Preparing for the visit
- Plan for the work area to be out of bounds to pets and children
- Mention any parking rules near the property
- Tell us about any previous sealing or DIY attempts
Get a quote
To get a quote, call 0345 464 0079 or email us with the location and a short description of the problem. You will have a clear quote before work begins.
Related advice
When something else is needed
Sealant is not the answer to every problem, and we will tell you before work begins. It will not solve:
- Broken panes
- Whether work needs listed building consent
- Masonry that needs repairing
If you are not sure, just call 0345 464 0079 or email us and we will give you a straight answer before you book.
Joints and surfaces we work on
- Sash and case windows
- Tenement windows
- Timber door frames
- Brick reveals
- Period & listed homes
- Stone surrounds
Also near Kidlington
What else we do in Kidlington
Frames and glazing around Kidlington
Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. Historic houses like Blenheim Palace (about 3.5 miles north-west) are a reminder that the area around Kidlington has older buildings as well as new. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window.
For an older house near a landmark such as Church of St Mary, the joint between an old wall and a newer frame is generally the first place rain gets in. If you let a flat or house near Oxford Parkway station, any sash windows need sound mastic to keep draughts and rain out. If you look after a building such as St Thomas More Catholic Primary School, its window and door frames need their mastic kept sound, just like a home’s.
Kidlington is about 5 miles north-west of Oxford, in Oxfordshire. Anywhere in OX5, we can carry out sand mastic at your property. We cover 443 towns and villages across Oxfordshire.
Postcode districts we cover here for sand mastic: OX5. Whether your property is on High Street, Sterling Road and Exeter Road or anywhere close by, we can help. Being close to the A4260, Kidlington is easy for our applicators to reach for sand mastic. If you’re just outside Kidlington, we cover Gosford (1 mile south-east), Hampton Poyle (1 mile north-east), Islip (2 miles east), Bletchingdon (2 miles north) and Enslow (3 miles north). Larger places within reach include Oxford (5 miles south-east), Didcot (15 miles south), Bicester (8 miles north-east), Abingdon-on-Thames (10 miles south), Witney (9 miles west) and Carterton (14 miles west).
Local landmarks in Kidlington
We work in homes and buildings around Gosford Hill School and Red Lion pub, among other places. The closest station to Kidlington is Oxford Parkway station, roughly 1.3 miles south. Nearby you’ll also find Oxford Castle (4.9 miles south) and Acland Hospital (4.3 miles south). Open spaces near Kidlington include Hook Meadow and The Trap Grounds.
Surface by surface
Sash and case windows
Most of our sand mastic work is on sash windows. We renew the mastic round each box.
Brick reveals
Sand mastic is also used where timber frames meet brick. It gives a traditional finish.
Why deal with it now?
Filling over old, loose mastic doesn’t last. Raking out and preparing the joint gives it a sound base so the new mastic stays put. Homes in smaller places like Kidlington can face more weather, and failed outside joints let damp into walls. Inside, a split seal lets water into floors and panels just as it would anywhere.
What you pay reflects the work, not a rough estimate. That’s why we ask a few questions first and agree the price before starting.
Why choose Mr Mastic in Kidlington
- Over 20 years’ experience
- Every job guaranteed for a year
- Full insurance on every job
- Sanitary silicone with an anti-fungal additive in wet areas
Take a look at how sealant jobs are priced or customer reviews.
Quotes for sand mastic in Kidlington
You will get a clear quote before work begins. It’s based on:
- How easy the joints are to reach
- Working hours on commercial sites
- The number of rooms or windows
- The type of sealant required
Combining jobs into one visit is generally more efficient than separate visits. We will give you a clear quote for the lot.
What we need to know
To help us quote quickly, let us know:
- Roughly how big the job is
- Where the job is, and your postcode
- A few pictures by email, if you can
- Whether it has been sealed before
Want a quote for sand mastic? Please ring 0345 464 0079 or drop us an email with a few details. You’ll know what we plan to do, and what it will cost, before any work begins.
Common questions in Kidlington
Can you do sand mastic in Kidlington?
Yes. We work across London and the South East, and Kidlington is part of that. Just ring 0345 464 0079 or email us with a few details of the job.
Do you work for landlords with property near Oxford Parkway station?
Yes, we work for landlords and agents. You can call 0345 464 0079 or email us with the address and a few details, and we’ll give you a fixed price before any work starts.
Do you offer different sealant colours?
We help you choose a colour that suits. The product needed can limit the range.
Is there any odour?
There can be a smell while the sealant cures, which fades as it sets. Opening a window helps.
Are you fully insured?
Yes. We’re fully insured.
Are you an approved applicator?
Yes. We hold ARBOMaster approved applicator status.
Which is right for my windows, sand mastic or modern sealant?
For period timber windows in stone or brick, sand mastic is often the better fit. Modern frames normally suit a flexible sealant.
Can old silicone round a sash window be swapped for sand mastic?
Yes. The silicone is cut out and the joint cleaned before the sand mastic goes in.
Keeping the joints in good condition
Joint life depends on how it’s used and looked after. We suggest:
- Ask the planning authority about consent for listed or conservation-area homes
- Ask a joiner to look at soft timber first
- Keep sills and gutters clear so water drains away
- Avoid patching sand mastic with silicone
Leave the new mastic alone while it firms up. It forms a skin fairly soon, but takes longer to harden fully.
Renewing mastic before redecorating saves doing it twice. Paint over cracked mastic only covers it up.